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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> white spacer and jetting /cgi-bin/YaBB.pl?num=1103735383 Message started by mike on 12/22/04 at 09:09:43 |
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Title: white spacer and jetting Post by mike on 12/22/04 at 09:09:43 First I want to say thanks to everyone who has answered my many posts in the last few days. I am new to the board and I really appreciate all of your help. I am new to the Savage as well but I have a lot of experience with Vespas and other small engines. I just purchased a 2001 savage and I am getting ready to install a straight pipe (dont try to talk me out of it because I have made up my mind). The straight pipe would be most similar to the MAC slip on. I have read post after post and it seems that there are 3 carb modifications that I can make: 1. drill out the plug and adjust the slow idle screw 2. remove the white spacer on the needle jet 3. change the main jet to 150, 152.5, or 155 From what I have read, it makes complete sense to dril out the plug and adjust the slow idle screw, as afterall it is adjustable and easy to change. My real question is, if you change the main jet to say a 155, then should you remove or modify the spacer. It seems here that most people do one or the other. I dont mind doing both, but It would be a real help to hear it from someone that has already had success or failure with it. Thanks so much for everyones help mike C |
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Title: Re: white spacer and jetting Post by tekxtc on 12/22/04 at 09:56:24 Good question. I am planning to do things similar to yours to my bike over the winter. This one I missed. Lets see what people weigh in. Autif |
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Title: Re: white spacer and jetting Post by Mr 650 on 12/22/04 at 10:37:11 mike wrote:
. I assume you have a good set of tools if you have wrenched on the scooters. Here's what I would do. 1st, Go get a 155 jet. Next, Pull the float bowl off the carb. Loosen the clamp on the intake rubber and twist the carb to the side you are working from if you must. Kick the bottom of the carb left and remover the left 2 screws then kick it right and do the right 2 screws. You may wind up removing the carb and letting it hang. Swap the 145 main jet for a 155. I would start w/ the 155 1st. Replace the crummy phillips head screws w/ allens. Ride it. If you test this in cold weather it may be rich come summer and a 152.5 my work better. If it is still too lean then I would file the white nylon spacer 1st before removing it completely. Let me know if the 155 is 'fat', I have a spare 152 I posted some pictures and all the dimensions awhile back. I have a Supertrapp w/ competition open end reverse megaphone and my next move is to swap the 157.5 for a 155. Greg and I both seemed too think the 157 is rich. I was hoping to prevent blueing. I have posted my experience building up a NOS carb last summer here. BTW; My Supertrapp is bluing (golding?) even w/ the fat jet in it, but the metallic-ceramic coated head pipe was fine. I pulled the batterylast week and she is parked 'til springtime as it is not insured December thru Feb. (Progressive) |
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Title: Re: white spacer and jetting Post by MIKE on 12/22/04 at 11:01:27 thanks tons, that is what I was hoping for. I think the jetting will do it but it is always nice to get a second opinion. As for the chrome, I could care less about blueing. I am going to paint my whole exhaust flat black with high temp paint. I love blacked out bikes like the Night train. I will post my pics and results for sure. thanks Mike |
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Title: Re: white spacer and jetting Post by Savage_Rob on 12/22/04 at 11:17:53 Essentially I agree with the above posting by Mr 650. I did not need to twist the carb at all though I may have been lucky. I accessed the float bowl screws with an offset phillips driver and was able to access the top set easily with the gas tank off. When reassembling, I replaced all 8 with stainless allen screws for future ease. |
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Title: Re: white spacer and jetting Post by rkutzner on 12/22/04 at 15:09:16 You should do BOTH mods. The main jet does not even start flowing fuel until 3/4 throttle and up. The idle mixture screw mainly effects up to 1/4 throttle. The needle adjustment (spacer mod) effects 1/4 to 3/4 throttle. This will cover the whole rpm range. Do a 1/2 spacer (if you take out the whole thing some here have said it actually dumps fuel at idle). Actually, there are alot of other little jets and things in there, but these minor changes get you 95% of the way there and don't seem to effect the other circuits and are a good stopping point in my opinion. I'll be finishing up these mods myself tommorrow and can let you know Monday how she runs ! I'm doing the 152.5 main by the way, seems a popular main with the Supertrapp crowd so I'll be ready for it by spring ! Mr 650, if you are still bluing, I doubt it has anything to do with the main, how often are you at 3/4 and up throttle? It's the needle setting that is probably giving you this since that is where you are when you cruise the most.....unless you are plowing along at 80+ everywhere you go......hehehe.......... ;D |
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Title: Re: white spacer and jetting Post by Nightrain on 12/22/04 at 15:52:17 thats good advise. If you could post your results that would be fantastic. I have been researching this subject all day and I think that you are correct. I found this link that is very helpful. http://www.dansmc.com/carbs2.htm |
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Title: Re: white spacer and jetting Post by Nightrain on 12/22/04 at 16:16:42 While were on the subject: 1. Does anyone know if one has to remove the tank or carb to do the white spacer trick or can one simply do the swivel trick? 2. Anyone have a picture of what it looks like inside the bore? Thanks Again Mike C |
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Title: Re: white spacer and jetting Post by rkutzner on 12/22/04 at 17:46:48 There's good carb pics on the technical section of this forum. As far as swiveling the carb, on my S40 at least it can be done after the top of the carb is removed but it scratches the frame paint. Without the top off it looks like it would be hard. But I was doing my valve lash maintenance so the tank is off anyways. I'd try and swivel it like the above directions but if you can't the tank is easy enough. Once you do the tank once, you'll find it's a 10 minute job: Remove seat remove rear bolts holding tank unhook feul line and prime line from petcock on tank unscrew speedo cable pull back tank slightly to get at the one electrical connection and unhook it pull tank off, back and to the left you also might have another hose to disconnect to get to the top of the carb, can't remember why I disconnected it but you'll see This is for the 05 S40, your results may vary but I doubt by much :) |
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Title: Re: white spacer and jetting Post by Ed L. on 12/22/04 at 18:49:22 You will be amazed at the change in with your bike with the mods. I rejetted to a 152.5 main. dropped in a K+M high flow stock type air filter, pulled the white spacer and replaced it with 2 #4 washers and installed a sportster muffler. My '02 runs like a different bike with a lot more power. It's well worth it |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 12/23/04 at 00:36:48 Ed L. Let me know how your Savage runs up top with the mods You have done, thanks. Clive W :D |
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Title: Re: white spacer and jetting Post by rkutzner on 12/23/04 at 04:16:05 Ed L, Can you give me the specifics on the Sportster muffler upgrade. I might consider it considering they are everywhere and dirt cheap until I can save for a Supertrapp. Rich |
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Title: Re: white spacer and jetting Post by Savage_Rob on 12/23/04 at 07:49:06 I can say mine's like a whole different bike too. I have the MAC muffler, the stock type K&N air filter, a 155 main jet, and a Dynojet needle set at the 5th notch from the end with the white spacer installed (though I don't recommend buying the DJ kit because of the expense; you can get the same effect by thinning/replacing/eliminating the white spacer). |
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Title: Re: white spacer and jetting Post by Nightrain on 12/23/04 at 10:12:04 One last question and I think that I will be on my way. Do I need a new gasket set before I attempt to removed the space and replcace the jets? Or are they rubber and re-usable. Peace! Mike |
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Title: Re: white spacer and jetting Post by Savage_Rob on 12/23/04 at 13:21:21 No gaskets needed for this. |
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Title: Re: white spacer and jetting Post by rkutzner on 12/23/04 at 13:29:39 Got mine together and in the garage it sounds better already...and no 'puhhhhh' when I shut her down. Unfortunately I have to wait a day or two to hit the road because it is raining cats and dogs here in MD and is to get cold this weekend. Next week is calling for highs in the 40s, though...I'll be out !!! Will let you know how it feels ! |
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Title: Re: white spacer and jetting Post by Ed L. on 12/23/04 at 15:49:17 rkutzner, the sportster muffler was pretty easy, I pulled the entire exhaust off the bike, took it apart and dropped the exhaust and sportster muffler off at a local muffler shop. I had them make an adapter that is 1 3/4"OD at one end for the sportster muffler to slip over and 1 3/4"ID at the other end to fit over the stock pipe. I also had a 10 degree bend put in the adapter to match the way the stock muffler inlet is. The adapter is only about 8 inches long and gives the same length overall. I was using the stock heat shield but it didn't look right so I just picked up a straight 10" long shield that covers the adapter and clamps. The stock muffler mounting location can be used, just get a piece of flat stock and drill the holes to match the stock mount. I was even able to use the original rubber mounts for the new muffler. If you are interested in a sportster muffler let me know, I have an extra in good shape I'll let you have for $10.00 plus shipping. I'll even include the directions I printed up from Bert's site. Let me know if you are interested in the muffler, we'll get hooked up. |
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Title: Re: white spacer and jetting Post by rkutzner on 12/24/04 at 15:21:42 Thanks for the offer, I'll think about it. I really want a Supertrapp, though, because I ride anywhere from the teens to the mid 90s and the Supertrapp will allow me to 'tune' for the seasons. I DID GET OUT TODAY ! The 152.5 main and 1/2 spacer ran very strong at 30 degrees (F) ! I suspect it may be a hair rich come summer since this seems to be the jetting of many of you with an aftermarket muffler....but for winter it seems to be right on. No more running with the choke half open. And I tried resetting the idle mixture screw, but it ended up at 1.5 turns out just like summer. It went to 2 before the idle started going back down, but I see no reason to mess with it during the seasons so I put the plug back in. |
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Title: Re: white spacer and jetting Post by Ed L. on 12/24/04 at 15:30:06 No problem, didn't think about the adjustability of a Super Trapp and how you can fine tune for the weather. Start saving you loose change, you'll have enough by spring. |
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Title: Re: white spacer and jetting Post by rkutzner on 12/24/04 at 15:34:55 Surprised someone is on here Christmas Eve..MERRY CHRISTMAS !!! |
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Title: Re: white spacer and jetting Post by Mr 650 on 12/26/04 at 10:42:48 MIKE wrote:
Paint won't stick to the chrome very well, it will flake off in short order, then it will get lumpy if you don't sand it before repair. I like the metallic-ceramic coating I have now. It comes in black. |
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Title: Re: white spacer and jetting Post by Lancer on 12/27/04 at 09:35:31 Dudes, do not forget the pilot system of the carb. It's primary function in the carb is to take care of the idle-1/4 throttle range. You should really change the pilot jet ...even on a stock bike, but especially on one that has had any mod's done to it. If you replace the stock exhaust you definitely need to go at least one size larger on the pilot...then adjust the pilot adj screw...but no more that 3 turns out. If you go more than 3 turns out then you need to up another size on the pilot jet, and readjust the screw. Then of course adj the idle speed. This is done seperately from the main jet of course, but they all end up working together for one smooth transition from idle to full throttle......if done correctly. MERRY CHRISTMAS AND HAPPY NEW YEAR |
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Title: Re: white spacer and jetting Post by Mr 650 on 12/27/04 at 09:48:41 What numbers have you tried? |
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Title: Re: white spacer and jetting Post by lancer27 on 01/07/05 at 08:00:42 When I had the stock carb (modified a bit) on the bike I was using a pilot jet that was one size larger than stock. The bike seemed to like this size, 55 I believe, and the pilot adjustment screw was backed out about 1 3/4 turns. The bike has a performance cam from Webcams, one over size bore with the silicone-carbide treatment on the cylinder, and a Performance Design muffler. |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/07/05 at 08:22:35 What are the cam timings with the webcams cam, thanks. Clive W :D |
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Title: Re: white spacer and jetting Post by lancer27 on 01/09/05 at 05:48:21 I am away from home at present but will look up the spec's when I return this week sometime. Just off the top of my head I think that the lift was increased from .250 to .264, and the duration was increased a total of 27 deg more than stock. I will follow up with the exact numbers. |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/10/05 at 00:14:39 Hey Lancer Your webcams interest me, 16% more time area, should really wake the Savage up along with your carb. The sticking point we have come up against before when tuning the savage is the exhaust port. My KLX has nice ports but a bit on the small side, the savage inlet is ok but the exhaust is bad, let me know how you get on with it, might beat the KLX, thanks. Clive W :D |
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Title: Re: white spacer and jetting Post by lancer27 on 01/10/05 at 06:13:59 When talking with Webcam techs about the lift/duration they offered about TEN assorted combo's to choose from, and I decided on one that was pretty much in the middle of road. I like power, but it has to be usable too. The result was a noticeable improvement all through the rpm range. I was very pleased with the result. When combined with the Edelbrock flatslide carb and the Performance Design muffler the Savage FEELS MUCH BETTER........he likes it......... And, it only cost a bit over $100. I sent them my cam/gear and they returned it the next week. A pretty fair trade, all considered. Ya'll have a great day. I have a train to catch.....going home after playing with grandbabies this month. |
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Title: Re: white spacer and jetting Post by lancer27 on 01/10/05 at 06:23:12 PS....I have not tinkered with the head yet....plan to do a little porting in the next few months though. I did get a gasket set for the top end before Christmas and noticed that it was a multi-layer set....when assembly after the head work I was thinking of using only part of the set to raise compressing a bit. What do you think? I do not remember the exact numbers right now, but when I got the gaskets I measured them...individually and together...and figured that I could raise the comp ratio about 1 point if I used just part of the gasket set. We will see. ALL ABOARD! Gotta go, the train awaits. |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/10/05 at 08:42:15 Hey lancer27 Please let me know how things go with the head tinkering, a photo or two would be good if You don't mind shareing. Clive W :D |
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Title: Re: white spacer and jetting Post by lancer27 on 01/11/05 at 21:19:07 Ah, home sweet home. I wanted to pass along the exact numbers on the cam that WEBCAMS ground for me. MAX LIFT DURATION @ .050 lift Stock: .254 In/.244 Ex 224 deg Perf: .264 In/.264 Ex 239 deg WEBCAMS offered 10 different cam profiles to choose from...7 had more lift but not as much duration...this one I chose was right in the middle of the "midrange torque" group. It has worked out quite well. Their website is www.webcamiinc.com., and the phone is 909-369-5144...1815 Massachusetts Ave, Riverside, CA 92507 USA. |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/12/05 at 04:01:39 Thanks a lot lancer, I like high lift cams. Clive W :D |
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Title: Re: white spacer and jetting Post by Kropatchek on 01/12/05 at 06:21:37 klx650sm2002 wrote:
Just to remind you: more than 1/4 of the diameter of the valve is useless. :o Better get the valves open quickly eg steeper angle. The valves stay open longer and the cylinder is filled more. Greetz Kropatchek ;D |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/13/05 at 00:26:45 The cams lancer is talking about are not lifting more than a 1/4 of valve diameter anyway. I was talking relatively. Clive W :D |
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Title: Re: white spacer and jetting Post by lancer27 on 01/13/05 at 22:32:25 The highest lift that was offered was .275", and that had a duration of only 229 deg at .050" lift. The tech guy I talked to prior to the work being done kept talking about the RAMP of the lobe...I think....it has been awhile...he did not want to make too steep of a ramp...something about not being too steep of a slope. Anyway, based on what he said at the time, I decided to go with the more moderate numbers and it has worked very well. |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/14/05 at 00:17:41 The other option for more performance is bigger valves, this is where the KLX scores with 37mm in 32mm ex and the savage has 33mm in and 28mm ex. with valve area being proportional to diameter squared that is 25.7% more inlet and 30.6% more exhaust area.I don't have the lift figures for the standard cams but the duration is about 224 degrees @.050in lift. Clive W :D |
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Title: Re: white spacer and jetting Post by lancer27 on 01/14/05 at 08:57:28 A significant difference indeed. Is there room on the Savage head for valves of that size? I am not knowledgeable enough about the specific deminsions of the Savage head to know. It would be nice though. |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/15/05 at 01:06:24 With the above numbers I made the assumption that valve lift increased in proportion with the valve diameter. Clive W :D |
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Title: Re: white spacer and jetting Post by Greg_650 on 01/15/05 at 08:20:42 Whoa...I tuned in a little bit late on this one. You had the stock cam reground? They also reworked the cam gear? Plus you have an over bore too? This is too cool. Maybe I missed it...did you post the link to webcams? Sounds like my next project is coming up... |
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Title: Re: white spacer and jetting Post by lancer27 on 01/15/05 at 19:29:45 The cam was reground by WEBCAMS out of Riverside, California. They can be found at www.webcaminc.com. The cam gear was sent along just to aid them in the cam work. I had it done almost two years ago. I experienced a massive oil loss on the freeway one fine Sunday afternoon. The result was actually fairly mild. The piston and cylinder were damaged and needed replacement, and not knowing of the 97 mm jug at Weisco at the time, I went with one size over from Suzuki. The head, including the cam, and the bottom end were fine...I run synthetic oil and believe that helped minimize damage. I have a great insurance company...they totaled the bike at $4600, and I bought it back from them for 25% of the settlement...A GOOD DEAL FOR ME! So, when it came time to put it back together I sent the cam off for the regrind, sent the new piston and the damaged cylinder to BORETECH for the rebore and silicone-carbide treatment, searched out and bought several mufflers (currently have Performance Design)and carbs (using Edelbrock flatslide) for try-outs, picked up a nice windshield from Dennis-Kirks ebay store, and a few other odds and ends. All in all, of the $2500 in cash I ended up with from the insurance, it cost me about $1500 to put it back together again. It is not a screamer but it does run pretty strong. I am kind of heavy handed on the throttle but the bike seems to be happy with my riding habits. It just keeps on ticking. When accelerating I shift from 3rd to 4th at just before 80 mph. I have a tach but it is a cheap one and gets pretty jumpy by 6000. The bike will turn 6500-7000 through 4th...on occasion it will go up to the 8000 range...not sure why...I think the engine has a rev limiter that fails to function some times...DOES ANYONE KNOW IF THERE IS A REV LIMITER? Anyway, 5th gear tops at just over 6500 +/- at about 105 mph. My next project is to fix the suspension. I have a set of Ceriani forks to put on...hopefully everything will fit properly...I am kind of tired of fabricating. Then the rear shocks will be replaced with some that actually provide some range of motion. I do not get to ride a lot...assorted physical things...but love to when I am able. By the way, this Savage was a Father's Day gift from my son a few years back...GOOD BOY!! |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/16/05 at 02:20:58 The red line on my KLX (83mm stroke) is 7500, the same piston speed on the savage (94mm stroke) gives 6500 which I thought it was limited to but aparently not. Lancer what header i.d. are You using, and what length? Thanks Clive W :D |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/16/05 at 02:44:33 Hey Lancer As You know I run a Keihin FCR41,have You tried any other than the Edelbrock? Thanks Clive W :D |
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Title: Re: white spacer and jetting Post by Greg_650 on 01/16/05 at 06:11:29 lancer27 wrote:
Others have mentioned a rev limiter on the Savage, and since some other bikes have then it is sort of assumed the Savage does too. However in all the tech stuff in the manual, there is no mention of such that I have found. Maybe since the stock Savage is basically under powered that Suzuki just figured that it would run out of air before self destructing anyway. |
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Title: Re: white spacer and jetting Post by lancer27 on 01/16/05 at 10:12:36 Like you, I have not seen anything in writing in the tech stuff that specifically identify's a rev limiter...that was why I included the question in my earlier post. It sure feels like one is there though. I wonder if the ignition system could be a bit weak (afterall, Suzuki didn't exactly put the best of parts into the Savage) and it just is not up to the additional power of a modified engine???? What do you think? Could that be the weak link? Anyway..... I still have the stock header for now. I am hoping to test some others in a few months. I do not have an inclosed shop/garage to work in so am at the mercy of the weather for car/motorcycle work. I am in South Carolina so by March-April I should be good to go. I want to build 3 headers with 1.5", 1.625", and 1.75" ID for the test. I will also include in the setup a connector on each of them so I can add various lengths to the header...probably for 30", 33", and 36" lengths. I would like, IF POSSIBLE, to make a reverse cone megaphone to try on it....to include a removable baffle for the pipe, just before the megaphone. The Goldstar I had back when, had a reverse meg and I loved the sound of that thing....just beautiful when it was running hard. In the carb area, I have tried both the flat and round slide Edelbrock, 38mm each, 36mm and 38mm Mikuni VM round slide, and various stages of the stock CV Mikuni. As stated, the Edelbrock flatslide is on it now and runs very good. The Edelbrock round slide was really good too, in some ways better than the flatslide. However, stupid me, I let it go in a sale to a Harley guy. Oh well!! The Mikuni VM round slides are quite good also, nearly identical to the Edelbrock round slide. (I think Edelbrock designed theirs after the Mikuni, but did a little bit better job of it) The stock CV responds fairly well to upgrades and will give good performance but lacks the crisp throttle response of the round and flatslides. The nature of the CV system is just slow...the lag time of the vacum operated throttle valve. It all comes down to how you like to ride. For easy cruising the CV is fine, but if you like to blast around a little then you can appreciate the round and flatslides quicker response. It is quite noticeable. Ya'll have a good day. |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/17/05 at 06:10:41 The coil on the KLX is weak above 40bhp so I use an iridium plug to nurse it. The header I use on KLX is 36" long(works best around 6500 and 3250)and 41.25mm(1.624")I.D., roughly the same as the carb. imho the pipe must be the same I.D. as the carb or bigger, not smaller.So I agree with the dimensions You are wanting to test. Clive W :D |
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Title: Re: white spacer and jetting Post by Greg_650 on 01/20/05 at 16:45:45 I still think that the Savage is just under engineered with regard to cam shaft, carb, compression, ignition, etc. and it just runs out of steam at about 6500 RPMs without needing a limiter. Simple physics is the limiter. It just can't suck and blow any more that it does. That can be a good thing too, which is why the engine is so bullet proof and has lasted so many years. It's kinda like my Malibu engine. 3.1 V6, low horsepower and torgue, but I have 212K on it with no noises, no smoke and no leaks. |
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Title: Re: white spacer and jetting Post by sluggo on 01/20/05 at 17:04:34 Greg_650 wrote:
a simpler example could not have been made. ; :) K.I.S.S. enginering at it's finest. |
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Title: Re: white spacer and jetting Post by Greg_650 on 01/21/05 at 12:32:59 I did kinda have fun with that one, didn't I? :o Actually, I think the Savage is built with about the simplicity of a Brigg & Straton. After all how many lawnmowers do you throw away when nothing is wrong with the engine anyway. Which makes me wonder about modifications to the stock engine....like does an overbore piston weigh the same as stock? Does the increased compression affect the engine balance? What happens if you squeeze more rpms out of it? What happens to the "strength of materials" in a modified Savage engine? |
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Title: Re: white spacer and jetting Post by sluggo on 01/21/05 at 13:11:42 those questions and more are why i did the appearance mods first. i put 98,000 miles on my last thumper with no mods whatsoever. i would love to get those kinda miles with this one. i'll just do the simple carb exhuast stuff. |
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Title: Re: white spacer and jetting Post by Savage_Rob on 01/21/05 at 13:52:17 Yup, yup. I've heard the Savage referred to as the VW of motorcycles and I can't think of a more apt description. |
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Title: Re: white spacer and jetting Post by sluggo on 01/21/05 at 16:54:38 Savage_Rob wrote:
so you must have heard me talking somewhere. i used the same to explain my gn 400.l |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/23/05 at 01:36:35 With KLX I keep to the std. red line, 7500 (=6500 on the Savage), I tune the pipe for 6500, 36" (=5500 and 43" n the Savage), and if I need to go inside the engine I'll up the compression to 10.5, is 9.5, the C3 model is 10.5 anyway. If you are going for a big bore piston try and keep the weight close to std. to keep the vibes close to std. also. Clive W :D |
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Title: Re: white spacer and jetting Post by lancer27 on 01/23/05 at 05:33:51 Dude, you keep listing the header length in inches vs. the rpm at which max power is made...is this rule of thumb affected by the ID of the header pipe used? If so, what are the changes...ie, for a 1 3/8 vs 1 1/2 vs 1 5/8 vs 1 3/4 ID? Is there a chart posted somewhere that addresses this issue? Thanks |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/23/05 at 07:06:57 RPM vs. length (open pipe) 3000 = 78" 3500 = 67" 4000 = 59" 4500 = 52" 5000 = 47" 5500 = 43" 6000 = 39" 6500 = 36" Where lengths are too long to fit half them. Clive W :D |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/23/05 at 07:33:34 Still need to sort out that exhaust port. Clive W :D |
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Title: Re: white spacer and jetting Post by lancer on 01/23/05 at 08:10:52 So does the pipe ID affect those numbers or are they applicable to all diameters? |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/23/05 at 08:32:45 The pipe i.d. should be the same size or bigger than the carb i.d. So with the std. carb is 40mm, the nearest tube size is 1.75"o.d. giving 41.3mm i.d. 41.3 - 40 = 1.3mm. 1.3*32 (the correction factor) = 41.6mm. This means that the pipe length you have chosen to give the revs you want must be lengthend by 41.6mm. 1mm more diameter needs 32mm more length. Clive W :D |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/23/05 at 23:15:12 I am guilty of being over accurate at times, so a mm or so on diameter and +/- an inch ish on length is probably no big deal on the Savage with it's tame cams. Clive W :D |
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Title: Re: white spacer and jetting Post by klx650sm2002 on 01/25/05 at 01:39:18 I've been measuring my std. carb, 40mm CV, and if you take the area of the butterfly spindle off the carb area you will have the equivalent area of a 37mm slide carb (my formula is based on slide carbs) So all you guys with std. carbs should run 38mm (1.5") i.d. and the lengths shown above for what rpm's you want +32mm (1.25"). Clive W :D |
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