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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Acceleration breaks up at 4,000 rpm /cgi-bin/YaBB.pl?num=1605231159 Message started by niceast on 11/12/20 at 17:32:39 |
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Title: Acceleration breaks up at 4,000 rpm Post by niceast on 11/12/20 at 17:32:39 bike is a 2001 Suzuki ls650 15,000 miles. 2 cans of carb cleaner through passage ways. used carburetor rebuilt kit Ebay item #312770968210 main jet listed is 130 pilot jet listed is 70 results after install 1}current bike runs 2}start right up without choke. (pulling out choke increases rpm from 1300 to 1800) 3}air mixture screw turned all the way in does not effect the idle. 4}air mixture screw 3 turns out increases rpm my main concern 5}motorcycle does not acceleration "well" after 4,000 rpm details: bike revs fine from idle to 5000 in neutral, first, and second, however in third, fourth, and fifth the acceleration at 4,000 breaks up and the motorcycle has trouble passing through 4000 to 5000. Example: fourth gear>3,000>WOT>rev fine to 4,000>rev breaks up falling and climb between 4,400 and 4,000 (for 2 seconds or 1/8 mile)> rev past trouble rpm range> 4,500 to 5,000 normal. background: I've tried all needle clip positions middle, bottom, and top with no changes to bad acceleration at 4,000 rpm. I've adjusted float level to spec 27mm to 29mm from carburetor body (without pushing in float needle trigger) I tried research what are signs of rich or lean condition. but haven't learned much. This is my first post. Help. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by DragBikeMike on 11/12/20 at 18:05:21 I suggest you STOP. Gather up all the parts you removed. Keep the stuff you removed separate from the new stuff you put in. The jet sizes you quote are not consistent with the stock carburetor jet sizes. The stock carburetor does not have needle clip positions, there is only one groove. Tell us what kind of carburetor you are working on? Stock? Mikuni VM? Other? Take photos, lots of photos. Post them so we can see. Tell us why you are working on the carburetor. Did it run OK before you started working on it? Be patient. Go slow. Do only one thing at a time. You can do this. We will help. 8-) |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by niceast on 11/12/20 at 19:58:35 Sure thing, Quick background: Got motorcycle few months ago (not running). Owner said it sat for 6+ years. Its stock. First time owning motorcycle and working on carburetors. I've been using the forums for techanical references the past few months and was able to get the ls650 back on the road, thanks for keeping the forums online. I wouldn't have been able to learn about the suzuki ls650 s40 so quickly without this website. mainly through the technical references, thank you for organization and the content. I did some minor work, new battery, lube maintenance recommended joints, new spark plugs, new head gasket and head plug (without removing the engine), retighten all bolts that I could stick a socket on. First carburetor disassembly: Removing the bowl I found black gum-tar-like residue, continued to complete the disassembly and blast 2 cans of 16oz carb cleaner through all the ports. Reassembled using an aftermarket carb rebuild kit. It came with an adjustable needle which I set to stock height. The motorcycle fired right up. Super about bring life to a motorcycle that sat for over half a decade. Since my ownership I have been running the bike under 4,000 rpm for 200 miles and no issues. currently: the float level was set to 27mm still had 4,000-4,300 no-acceleration, adjusted to 28.5mm today will test again when the sun comes out the aftermarket main jet looks-like it has the same bore as stock main jet, This past week I've been slowing pushing the bike to higher rev range and found acceleration trouble at 4,000~4,500 rpm. I have videos and picture of all my work. let me know what you want to see. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by verslagen1 on 11/12/20 at 20:27:34 What country are you in? jet sizes say canada or EU you said the pilot was a 70, and turning it all the in didn't do anything. I think it's too large. specs say it should be a 47.5. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by LANCER on 11/13/20 at 08:16:21 687B6C6D727F797B702F1E0 wrote:
...... He also said when turning the pilot screw out to 3 turns the rpm increased which suggests going larger on the pilot. His carb definitely has some “emotional issues” that need to be worked out. A carb sitting for 6 years with gas in it will have a lot of hard and gooey rubbery deposits, and often more than carb spray/air is needed; sometimes you have to revert to the carb tool wires and then redo spraying/air. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by DragBikeMike on 11/14/20 at 11:11:01 "I have videos and picture of all my work. let me know what you want to see." Upload the vids to your YouTube account and post the links here. Post some photos using the "choose file" button. Try and select photos that show the majority of the carb internals. Then as we look over your photos if we see something of concern we can ask for more detailed views of that particular component. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by niceast on 11/14/20 at 18:12:11 North America less than 1,000 feet elevation. I believe the aftermarket jets are the same sizes as stock just different brands marked different numbers. I'll rip the carburetor off and do another cleaning of all ports with some cans of carb cleaner. update: ran 120 miles round trip. marked throttle grip at closed, 1/8, 1/4, 1/2, and WOT. cruised at 50-53mph normal, burned through some oil (was filled at max, end trip showed minimum level), mpg measured normal, float level adjustment didn't make any affects, couldn't accelerate past 4,000 rpm again. symptoms, cruising 50 mph at 3,900 just below 1/2 throttle. wanted to cruise at 60 mph, As soon as I got at or above 1/2 throttle (4,000 rpm) the bike would sputter and backfire. adjustable needle positing is at top clip aka leanest position. rpm would fluctuated, down and up, causing me to be pushed forward and backwards on the bike and also sputters from the exhaust. i'll try to add some photos and videos next update. last question: is it possible to adjust foot pedals? I want to ride with boots and can't reach the shifter or rear brake because of the limited ankle flexibility from stiff boots. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by ohiomoto on 11/14/20 at 18:48:48 1) What petcock are you using? 2) Have you checked that the diaphragm and slide are working properly? 3) Starting with stock jetting will keep you from chasing your tail and should work reasonably well. If it doesn't then jetting is not your problem. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by niceast on 11/14/20 at 21:06:46 raptor petcock (i did notice the outlet barb brass fitting is smaller then stock petcock, also adding a inline fuel filter cramped/semi-kinked the fuel line) new to carbs, how do I check if slide is working properly? just adjusted clip to lowest position, richest, resemble the needle plate so that the two holes are clear and set air fuel screw to two turns. testing tomorrow. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by verslagen1 on 11/14/20 at 23:19:08 that smaller barb is going to limit the gas flow at full throttle. hence, accel breaks up at 4000. the fuel filter is not helping either and unnecessary. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by ohiomoto on 11/15/20 at 08:40:01 5E595355514344300 wrote:
That is probably a Chinese knockoff and what varslagen1 said could be true. 5E595355514344300 wrote:
Make sure the slide clean and the black coating isn't worn off. Make sure the diaphragm is properly seated in the top of the carb. If you remove the airbox and run the bike, you should see the slide moving with the throttle changes. Plenty of what people think are "jetting issues" could be caused by sticky slides. I replaced mine...best $120 I've ever spent on my bike. 5E595355514344300 wrote:
This is where you have this ALL WRONG. You fix performance issues by finding the cause of the problem, not jetting. Jetting is for tuning only. The bike will run properly with the stock jets, start there. 1.) You are using eBay after market jets...WRONG. You'll never know if the problem is the jetts you're using or something else. Clean and/or replace the stock jets and put them back in. This will eliminate that as a potential problem. (And make sure you don't mix up the fuel jets in the bottom of the carb with the air jets on the top of the carb.) 2.) You might have issues fuel delivery to the carb. Use a genuine Raptor petcock from Yamaha. Ditch the inline fuel filter. The petcock already servers that purpose. 3) Make sure the slide functions properly. 4) The people on here are very helpful. DragBikeMike and LANCER both pointed out the jets you are using are not the correct jets for this bike. These are two are carb experts. If you choose to not follow good advise, we won't waste our time guessing what's wrong with your bike. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by justin_o_guy2 on 11/15/20 at 09:16:18 Full stop.. Put a Genuine Yamaha Petcock on. Ditch your inline filter. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by LANCER on 11/15/20 at 09:41:49 Is your 3-clip position needle a stock unit from an 80’s model CV carb or did it come with the kit you bought on eBay ? If it came with your kit I would remove it and use what was in the carb when you got it. If it’s from an 80’s CV carb then put the clip in the center groove. If it originally had a single groove needle then put it back in. You need genuine Mikuni jets to know for sure what we are working with. If you have them or can easily get them then use a #50 pilot and #152.5 main and set your pilot screw at 1.5 turns OUT. If not, I have them. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by niceast on 11/15/20 at 17:44:56 Hi new update: the aftermarket jets are same a stock just different numbers. the lowest needle jet position (richest) + clear air hole in needle jet plate was positive. The motorcycle was smooth up to 60mph/4,4000 rpm.Where then it began to sputter/break-up/spit again. weird that bike revs fine to 5,000 rpm smoothly from lower gears, first and second. I do remember running starter fluid through the carb for 2 seconds when i first got the bike just to hear it run. Which might have cause some gum-tar-like fluid to enter deeper into the carb. I did disassemble and clean the carb afterwards. which you can see in the before after photos below. http://https://i.imgur.com/nPO30fal.jpg http://https://i.imgur.com/FpGPss0l.jpg http://https://i.imgur.com/1trT5kpl.jpeg http://https://i.imgur.com/f8f30bel.jpeg http://https://i.imgur.com/s59RUKKl.jpeg next steps: 1) I will remove the boot between the carb and airbox and check the slide function during operation. 2) another carb cleaning. thank you again for joining the conversation. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by LANCER on 11/16/20 at 06:38:52 That is as nasty a carburetor as I have ever seen, and I have seen a few. It’s got to be in the top 3-4. If you have not run carb tool wires through every little/tiny passageway in your carb body then stop and do so before doing anything else. I had a carb sit for 1 year and I needed to use the carb tool during cleaning. It’s essentially the same as a welders tool used to clean the jets on gas welding torches. How did you determine that the no-name jets were the exact size of the Mikuni’s ? Is the jet needle stock or not ? |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by LANCER on 11/16/20 at 06:43:11 Did you get the part number off the needle jet ? It could be helpful. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by Gary_in_NJ on 11/16/20 at 08:16:20 niceast, If you still have the original carb, I would consider using it over this one. This carb needs a few days in an ultrasonic cleaner. It may need a few trips into the ultrasonic bath with high pressure air and pipe cleaners in the passages. That's being hopeful, because these photos show an unusable carb. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by DragBikeMike on 11/16/20 at 13:31:07 My oh my, that is one gooey lookin mixer. Thanks for the photos. Now we know what we are dealing with. My compliments on how clean you have managed to get it. Tell us more about how you are cleaning, what brand of cleaner, etc. Although this problem is not consistent with your complaint, it is still a problem and needs to be corrected. Your enrichment jet is plugged. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by DragBikeMike on 11/16/20 at 13:32:18 I can't tell from your photo but the enrichment air bleeds are probably plugged too. That would be these holes. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by DragBikeMike on 11/16/20 at 13:34:15 And I suspect the well for the enricher jet (the well is located in the float bowl) is also probably fouled. There is a tiny passage that connects the well to the bowl. Well circled in red, passage circled in yellow. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by DragBikeMike on 11/16/20 at 13:39:38 The small emulsion holes in your needle jet are easily fouled. They should be checked. These 8 holes control part throttle air emulsion. If they are plugged, you will have an overly rich mixture at throttle openings above idle. Check these holes. While the needle jet is out, clean the cavity where the needle jet resides in the carb body and blow through the air bleed passage to make sure its clear. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by DragBikeMike on 11/16/20 at 13:41:09 The passage in question runs from the main air bleed at the carb opening to the hole where the needle jet resides. This shows the main air bleed. Make sure its not plugged up. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by DragBikeMike on 11/16/20 at 13:45:31 I believe someone mentioned your two pilot air bleeds. They are located in the top of your carburetor, beneath the rubber diaphragm. Sometimes the larger one gets mixed up with the main jet in the float bowl. Check to make sure that the jet shown on the left is a #230, and the jet shown on the right is a #45. Your problem as described is consistent with the #230 jet being mixed up with the main jet. It is also consistent with a main jet that is grossly too large or too small, or a bogus jet that flows way too much or too little. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by DragBikeMike on 11/16/20 at 13:49:03 Our friends from the Southern Hemisphere have reported a problem that could cause exactly what you describe (engine signs off about 4500 to 5000 rpm). Seems the Suzuki factory delivered their motorcycles with a plastic stop in the slide assembly. That stop limits slide travel. Why would anyone want to do that? |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by DragBikeMike on 11/16/20 at 13:50:19 Since you are in North America it seems unlikely, but if you have a white plastic contraption like this, take it out. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by DragBikeMike on 11/16/20 at 13:53:51 Although there are many passages running through the carburetor, very few are submerged in fuel when the bike is at rest. If you have plugged up passages in the carburetor, they will most likely be below the fuel level. So anything above the float bowl gasket stands a good chance of being clear, and anything below the float bowl gasket stands a good chance of being plugged up. A number of folks have mentioned that you should be using OEM jets. I agree. Ditch the eBay stuff and use only OEM jets, needles, etc. You just don't know what you are dealing with when you install that eBay stuff. Jets are precision orifices. There's more to them than just a hole. The angle of entry/exit and sharpness of the interface control the flow through the orifice. Put in the OEM stuff so you can rule out the aftermarket blues. It's easy to find the genuine Mikuni main jet and pilot jet (no emulsion holes in the pilot jet). The needle jet is a special stainless steel item. It doesn't wear out and you should be able to clean it up. If your needle jet looks like brass, it's bogus. Get the genuine OEM Suzuki part. For 1988 thru 95, it's a 766M X-8, for the later models it's a 766M X-7. Same for the slide needle. The needle is special. You won't find it at Jets-R-Us or Sudco. Buy a genuine OEM Suzuki needle. For 1988 thru 95, it's a 5C16, for later models it's a 5C39. I personally like Babbitt's Suzuki Parts House, and my local Suzuki dealer is a pretty straight shooter too. Good luck, Mike |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by niceast on 11/26/20 at 10:07:36 update: [1] slide functions is normal [2] cleaned enrichment post (maybe still gummed, where does it lead to?) [3] float is set to 27.5mm [4] plugged vacuum port After cleaning the carburetor, the problem has gotten worse the rpm start to break up even early near 3,800. Just to mention, air temperature have cooled since the past tuning test. I have a question, where does the enrichment post lead to? self answered: the hole next to the post, following the channel. I tried running the bike with the choke out and it responded better. http://https://i.imgur.com/oLLVwUil.jpg http://https://i.imgur.com/mLLS0dql.jpg http://https://i.imgur.com/cpCqyk8l.jpg http://https://i.imgur.com/eps5bTql.jpg http://https://i.imgur.com/Fg9iU95l.jpg |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by niceast on 11/26/20 at 12:26:07 Reviewing situation Idle to half throttle operation is normal. Problem occurs at half throttle or greater: Therefore I followed the main air and jet circuits. Couldn’t not find any major conclusions. Though after looking at the Transient Enrichment Valve (air cut off diaphragm) notice small tears and rips on one side. I believe it may have been my fault when I first did a carb cleaning I didn’t disassemble that part of the carb before spraying carb cleaner which can cause rubber material to expand and stiffen. I have to repair or replace and update the thread with my findings. In the mean time anyone else want to share their experiences with bad or damaged air cut off valve? http://https://i.imgur.com/l6pPNVbl.jpg http://https://i.imgur.com/K3mWbXgl.jpg http://https://i.imgur.com/BB5or3Ul.jpg |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by ckahleer on 11/27/20 at 14:35:42 Since you have the carburetor off the bike, check slide function with a shop vac. You should be able to see slide go up and down smoothly as you open and close the throttle plate. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by niceast on 11/27/20 at 16:08:15 Update Took the stock main jet and drilled out to 3/64” response was much better more smooth. Still has one rough spot. I forgot to mention I am running a nufoam air filter. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by Dave on 11/28/20 at 03:46:28 The thing you are calling ab "air cut off valve" is actually called the TEV (Throttle Enrichment Valve). The purpose of this valve is to provide more fuel flow when the throttle is closed while decelerating or as you are accelerating and shifting gears and a high vacuum is created - the valve is supposed to reduce the lean condition that causes the popping/banging exhaust noise in the muffler (backfiring). It there are holes in the diaphragm it could allow fuel to enter the carb and create an overly rich condition. The part is available from Suzuki and is pretty darn expensive. https://www.ebay.com/itm/Suzuki-GV1200-GV700-VS1400-VS800-LS650-Carburetor-Diaphragm-13480-05A10/201420454058?epid=1111861667&hash=item2ee59838aa:g:dgkAAOSwu4BV6GoD There are aftermarket ones that are half the cost. https://www.ebay.com/itm/Suzuki-LS650-Savage-Boulevard-S40-K-L-Carburetor-Air-Cut-off-Valve-Kit-0104-029/372478150764?hash=item56b96d886c:g:7T8AAOSwcu5USq2Y How many turns out is you idle fuel mixture screw? The photo you posted shows the screw slot nearly flush with the carb body - it should be recessed far into the hole....as there used to be a brass plug blocking the access. The screw should never be turned out more than 3 full turns, as the tapered needle is no longer functioning if you have to turn it out that far. If you need to go more than 3 turns out to get a good smooth idle - you either need a larger pilot jet or you have a problem elsewhere in your carb. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by DragBikeMike on 11/28/20 at 10:40:21 Niceast you seem to be having fun. Keep at it and you will prevail. I know it's hard to follow all the advice you receive here on the forum, but you really should do your best. One suggestion that has been offered over & over is to ditch those aftermarket components. On 11/15 you posted: “the aftermarket jets are same a stock just different numbers.” On 11/27 you posted: ” Took the stock main jet and drilled out to 3/64” response was much better more smooth.” The OEM Mikuni main jets come in .025 millimeter increments. That would be .00098”. The stock main jet is a #145. That’s 1.45mm, or .057”. You drilled your main jet with a 3/64” drill (.047”), which I assume means that it started out somewhat smaller than .047”. In comparison, a #120 Mikuni main jet is 1.2 mm or .047”. As you can see (if you actually removed metal when you drilled out your jet) the jet had to have been smaller that .047”. That means it was smaller than a #120 Mikuni main jet. A #120 Mikuni main jet is ten-sizes smaller than a #145 (120, 122.5, 125, 127.5, 130, 132.5, 135, 137.5, 140, 142.5, 145). Drilling main jets doesn’t work well. They are precise orifices, they come in .00098” increments, and the entry and exit tapers are critical to the flow through the jet. Get the correct Mikuni jets, not aftermarket junk. Genuine Mikuni jets only. On 11/16 I posted a picture of the OEM needle jet and suggested you check the emulsion holes for obstructions. Did you verify that you have the correct stainless-steel needle jet? Are the small emulsion holes clean? On 11/26 you posted a picture that implies your slide does not open completely. Go back and look at the picture I posted on 11/16. It shows side by side pictures of slides. The one on the left looks like yours. It’s not opening all the way. The one on the right shows how it should be. Which one do you have? The holes you show in your TEV diaphragm are certainly a concern. They will result in a manifold vacuum leak. Air will be pulled from the pilot air jets (in the dome of the carburetor) through the diaphragm, and then into the vacuum port. It will cause poor idle and you will have to compensate by backing out your mixture screw and/or installing an oversize pilot jet. Note Dave's prior comment about how far your mixture screw is turned out. You must replace the diaphragm. On 11/27 you posted: “I forgot to mention I am running a nufoam air filter.” Foam pod filters are a known problem. Is your “nufoam” filter a pod filter or is it a direct replacement for the stock filter element? A pod filter clamps to the carburetor, a direct replacement filter gets installed in the stock airbox. Pod filters can cover up the air vent for the carburetor dome. If that vent gets covered up or partially obstructed, it will prevent the slide from lifting properly. This is the vent opening in question. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by niceast on 12/03/20 at 18:26:51 Quick update, thanks for all the replies, I am having fun restoring the bike to its former glory. Gutted the oem air filter using the bracket to install the Nufoam. Idle screw is aftermarket, it’s further out for easier adjustment. At 1.25 turns out Yes the slide does function all the way up and down. I just took a quick picture. Emulsion are clear http://https://i.imgur.com/oLLVwUil.jpg Tev diaphragm is working. Idle is normal. Also have replacement as needed. Thank you for the detail description of the jets sizes. Knowing my choices as either oem replacement or diy. I accept and choose to DIY by drilling 1/16” or 0.0625”. The bike now runs better. If stock #145 is 1.45mm in theory this would be a #158.75 main jet. http://https://i.imgur.com/UwOwMNul.jpg Problem solved Original topic: No acceleration passed 4,000 rpm Bike would sputter +/- 200 rpm, could not increase speed pass 55mph Solution Drilled main jet to 1/16” Bike feels like its running normal. Currently the air temperature are 50 Fahrenheit and air is super dense. Not running stock air filter. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by ohiomoto on 12/03/20 at 19:09:39 Please don't take this as being negative, but something isn't right. Needing a main jet that large to get over 60 mph??? It just doesn't add up. (If I had to guess it would be because the needle isn't OE and is probably also much larger than stock.) For reference my bike will do an easy 75-80mph (but not much after that) on a 147.5 main. Or it may be a 145 main? I don't remember exactly anymore, but I know I'm running a little leaner than most on here. It had a 155 main in there when I bought it and it was a turd. My point is that you should be able to get 90-95% full performance from stock jetting. If you can't do that then you only have a solution for the symptom and not the problem. But if you are happy with what you have now, then more power to you! :) |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by niceast on 12/16/20 at 19:14:43 Final summary: Problem: Unable to accelerate/cruise pass 60mph North America Below 1,000 feet sea level Symptoms: Rpm not passing 4000rpm Rode like it was running out of gas at 4000rpm/60mph (pushes forward>stops acceleration> falls back> loop) Test conducted: Clean carburetor (no difference) Check slide function (no difference) Check adjustable needle height (no difference) New petrol (no difference) Actions: Drilled main jet 1/16” Result: All functions as normal My background: Mechanical engineering masters and undergraduate. Justification: Motorcycle was designed before 1986. A time before FEA and advance computer calculations. No where near today’s capabilities. Precision of motorcycle efficiency were hand calculated. So I can sleep easy, drilling the main jet orifices. If you wish to challenge please present 4-5 page research paper on a study of fluid dynamics and aerodynamics + 10 scholarly references/journals/articles that predate 1986. Must show your own work and using FEA software for your original examples. Late work not accepted. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by ckahleer on 12/16/20 at 21:24:53 I had an 81 Honda CB650 that ran at low speeds fine, but at highway speed was too rich and would foul plugs. I rebuilt carburetors several times, went through many electrical possibilities, but found the only thing that corrected the problem was to prop the airbox cover open. It worked fine that way, so that's how I rode it. I do not believe I corrected an airbox issue the 80's Japanese engineers got wrong. I compensated for a problem I was not able to find. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by ohiomoto on 12/17/20 at 17:05:29 3A3D3731352720540 wrote:
--------------------- Well...you just went from needing help to an expert in a hurry (and you're still wrong ;D). But it's working for you so carry on. :) |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by Gary_in_NJ on 12/17/20 at 17:34:28 5552585E5A484F3B0 wrote:
Great. Another abrasive know it all expert. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by ohiomoto on 12/17/20 at 17:56:55 Nah, I see some sarcasm. It's all good. No need to get angry. :) |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by niceast on 12/24/20 at 17:57:40 717B7F757E77737A242226160 wrote:
Great. Another abrasive know it all expert.[/quote] your right Gary. I need to be more humble. I know nothing. closed thread, please no addition progress regarding topic is being discuss, other than disagreed opinions of wether to diy-fix or buy-off-shelf parts. |
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Title: Re: Acceleration breaks up at 4,000 rpm Post by Slowlane on 01/02/21 at 17:28:12 Could not get over 53 mph until I cleaned this http://[img]https://i.postimg.cc/59wJW97v/The-culprit-4-a.jpg (https://postimg.cc/4nNqzGTN)[/img] |
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