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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> 2007 S40 Thinking About Mods /cgi-bin/YaBB.pl?num=1490640164 Message started by R1_Cowboy on 03/27/17 at 11:42:44 |
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Title: 2007 S40 Thinking About Mods Post by R1_Cowboy on 03/27/17 at 11:42:44 Hello everyone my father has an S40 and we are thinking about making some mods to his bike to give it a better top end. So far we have purchased a K&N air filter, we want to change the exhaust and jet the carb. I saw a post from Lancer awhile ago that laid out all the jetting sizes and tuning parameters but I cant find that post any more and we are not sure which HD Muffler we should ask for from the dealer. Can anyone confirm if this bike actually has a rev limiter? This bike spends most of its time on twisties in the mountains of British Columbia. The overall performance of the bike is good on these roads, it just needs a bit more top end. Thanks in advance |
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Title: Re: 2007 S40 Thinking About Mods Post by justin_o_guy2 on 03/27/17 at 11:56:20 Hominy miles? |
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Title: Re: 2007 S40 Thinking About Mods Post by Ruttly on 03/27/17 at 12:09:55 If it has a rev limiter I haven't hit it yet, wiesco piston, ported head , mild cam , crazy carb mods , header , lighter flywheel , I really don't think it has one ! You could gear it up alittle , I think Dave sells the bigger counter shaft pulley ! |
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Title: Re: 2007 S40 Thinking About Mods Post by Dave on 03/27/17 at 12:12:59 There is no usable rev limiter that has been confirmed - but there is really no reason to rev it much over the 6,500 rpm published redline - as it just doesn't make any HP up there. You can easily feel the acceleration drop off as the revs build. The Harley DYNA muffler with the slotted rail is the easiest to adapt. It is also easiest to mount if you use the RYCA angle adapter - or get an angle adapter made. It should be 6 degrees for the DYNA muffler. If you are not going to change the piston or camshaft to make more power - you can still remove the header pipe and trim away some of the "donut" in the exhaust port. This helps the engine breath a bit better - but a performance cam would help even more. Simple gearing changes can help with the over 60mph cruise speed, a 140/90-15 rear tire....and a 25 tooth Kawasaki front pulley also helps (stock is 23 tooth). |
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Title: Re: 2007 S40 Thinking About Mods Post by Gary_in_NJ on 03/27/17 at 12:33:04 [Advance warning - the numbers quoted below are WAGs but they do reflect reality] So a stock S40 makes about 25-26HP Add an exhaust, air cleaner, jet it correctly and you'll open it up to 26-28HP. Investment maybe a few hundred dollars. Get the gearing correct for the type of riding you do, no extra power per se, but the power available will be in an rpm range where you can make the most of it. Once again, the investment is maybe a few hundred dollars. The next step gets complicated. To really open up this engine will require cams, new piston, reworked cylinder and porting and polishing of the head. You'll be making around 35HP at an investment of $2,000 to $3,000 (depending on what you can do and what has to be done). After such a large investment your top speed will increase by 8, maybe 10 mph. For a bike that just isn't much fun to ride above 70-80mph anyway, is it really worth the investment? |
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Title: Re: 2007 S40 Thinking About Mods Post by R1_Cowboy on 03/27/17 at 12:47:49 594640475A5D6C5C6C54464A01330 wrote:
It has 3500 miles on it |
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Title: Re: 2007 S40 Thinking About Mods Post by R1_Cowboy on 03/27/17 at 12:49:54 02393423323E252338303D22510 wrote:
We were just looking at the RYCA adapter and talking about there reverse cone vs the dyna... thanks for the info on the gearing changes we will look in to that! Dad likes the sound of the Dyna exhaust I figure thats the one we will check out :D |
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Title: Re: 2007 S40 Thinking About Mods Post by R1_Cowboy on 03/27/17 at 12:54:30 7A70747E757C78712F292D1D0 wrote:
Worth is completely subjective :) We are looking at a bike that fits very well works well in the environment it's being used in and is light 8-) |
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Title: Re: 2007 S40 Thinking About Mods Post by Gary_in_NJ on 03/27/17 at 13:02:52 I understand. And I also understand that you are looking for more top end. My point is even if you could increase the top end to 155mph for only $100, it doesn't change the character of the bike at 80mph. Anyway, if Dad is gonna be flogging the back roads of BC on an S40 at elevated speeds, get him the Big Brake Kit for fathers day. The stock brake is unsafe at anything beyond parking lot speeds. |
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Title: Re: 2007 S40 Thinking About Mods Post by R1_Cowboy on 03/27/17 at 13:42:35 4842464C474E4A431D1B1F2F0 wrote:
;D ;D ;D |
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Title: Re: 2007 S40 Thinking About Mods Post by smokin_blue on 03/27/17 at 14:47:46 I would counter Gary in NJ comments a little (actually temper them is a better way of putting it.) My suggestion would be to go the technical documents/reference section and in the stickies find the table of contents http://suzukisavage.com/cgi-bin/YaBB.pl?num=1181745927 that has everything you need. Now my suggestion would be to get a Mikuni VM carb, open up the exhaust donut as previously described, and put on the Dyna muffler and rejet. You have now opened up the breathing and done it cheaply. From there it is only a couple hundred bucks to drop in a cam. Highly recommended. At that point see if you have enough. AT this point you are still under $1,000. I think the hi-comp piston is overkill unless you really want to keep pouring the money in for diminishing returns. From there you can change the acceleration / cruising characteristics through gearing changes. As noted Dave is a fan of the belt and talks about pulley changes. I am a fan of sprockets and chains so I would recommend converting and have the ability to set up what ever you want. The conversion is easy and the options then are endless. It is easy to go higher than stock for more relaxed cruising or drop one tooth on the front sprocket and have more acceleration. |
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Title: Re: 2007 S40 Thinking About Mods Post by verslagen1 on 03/27/17 at 14:56:02 Top end is so subjective. My stocker will do 85 going uphill, sooner or later. Beast will hit 95 on the same hill almost as soon as I twist it. Not that I really want to go beyond 80 for very long on either. On the flat the stocker will do the ton, I don't need to try the beast. What will your dad's do now and what does he want it to do? |
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Title: Re: 2007 S40 Thinking About Mods Post by batman on 03/27/17 at 18:13:06 In my opinion riding in the hills doesn't call for to much more horsepower than stock,I would suggest be for dumping tons of money into the bike it may be better to 1( tune the idle screw 2(do the spacer mod.3)test the main jet 4(go to the Dyna muffler,5)buy the K&N slide in air filter. Next I would think about handling ,after market shocks and fork brace , possible brake up grade ,(maybe just organic pads) all could be done for about $300-400 bucks and be a vast improvement on the way the bike runs now .More hp on twisty mountain roads isn't likely to be used, or useful if the bike can't stay on the road. |
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Title: Re: 2007 S40 Thinking About Mods Post by Gary_in_NJ on 03/28/17 at 05:56:58 6876747072754479776E7E1B0 wrote:
Thanks for the offer Blue, but no need to temper what I said because my opinion is quite strong in this regard and has been formed from over 40 years of motorcycling. This bike spends most of its time on twisties in the mountains of British Columbia. The overall performance of the bike is good on these roads, it just needs a bit more top end. "Just needs a bit more top end" is a phrase that just makes my Spidy sense go off. The LS650 is not a sport bike. It's not even a standard or UJM, it's a parts-bin cruiser that uses the lowest spec materials in Suzuki's inventory. The last thing this bike needs is more top end. What it needs is better brakes, better suspension, and then more power. In that order. I've seen too many people that thought that more power = more fun. More power will make me a better rider. More power will make me faster. They typically stop thinking that in the back of the ambulance - if they are conscience for the ride. Add the aforementioned BBK. Read my thread on suspension improvements. That alone will get you "more top end" as the bike can be safely ridden at a faster pace. Speed isn't about power. Speed comes from smoothness, confidence and the ability to anticipate. If this triangle isn't in balance you'll find yourself sliding under, or getting high-sided from, your bike at some point. |
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Title: Re: 2007 S40 Thinking About Mods Post by Dave on 03/28/17 at 06:13:49 I guess I need to know what the OP means by "more top end". In stock form the engine sounds happy up to 60 mph @ 4,000 rpm....beyond that it just sounds like it is working too hard (my personal opinion). With stock gearing at 70 mph the engine is turning 4,676 rpm....and at 75 mph the engine is at 5,000 rpm. When my bike had the stock gearing....I just didn't like riding at sustained speeds much over 65 mph. If they are looking for the ability to get on the highway and keep up with traffic when they need to - then gearing changes may be all that is needed. However....if those highways include long steep uphill grades, the bike may not be able to sustain 70-75 mph with a stock engine and higher gearing. However the spacing between 4th-5th is pretty small, and when you use taller gearing 4th is nearly equivalent to what 5th was before the gearing change was made. If you add HP to the engine and decide to use that extra power...then I agree that chassis and brake upgrades are desirable. I weigh 170 pounds and I could bottom out the rear shocks and their limited travel if I hit a big bump, and the front brake is a bit wimpy compared to what sport bikes or sport touring bikes have....it might be similar to what other cruisers have. |
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Title: Re: 2007 S40 Thinking About Mods Post by philthymike on 03/28/17 at 07:51:19 I have the big bore high compression piston and stage 2 cam along with a Dyna muffler and a larger main jet in the stock carb with original airbox and filter. I also had the carb tuned by somebody who really knows his business with carbs. I am really happy with the powerband of the bike now. The cam alone seems to be the biggest single improvement to the engine performance. But as others said you'll want to do something about the suspension and brakes in addition to these mods. I have better shocks and it's a huge help. I'm saving up for the bigger brake now because it needs it more than ever. |
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Title: Re: 2007 S40 Thinking About Mods Post by old.indian on 03/28/17 at 08:24:52 With the same engine mods as listed in my post http://suzukisavage.com/cgi-bin/YaBB.pl?num=1455307251 I'm getting 37 HP and 39 ft.lbs. of torque ON THE PAVEMENT. BUT my build is a "touring"/ cruiser for the long stretches of high desert I ride (at 60-65 MPH). If your father wants the "Twisties" , I recommend that your efforts be directed on rear shocks, front brake, and probably an 18" rear rim and tire. Dave rides/ lives in the twisty part of the country. I would get his advise on that . FYI: Running the Savage motor, even as much modified as mine, for long stretches of 4,500 -5,000 RPM tends to use oil (mist out the breather) quite rapidly.... The Air cleaner, jetting and muffler mods you describe are an inexpensive and quick way to pick up a quick HP or two. After that each Horse gets more and more expen$ive. |
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Title: Re: 2007 S40 Thinking About Mods Post by Dave on 03/28/17 at 09:48:49 The rear tire doesn't have to be bumped up in size for twisties - there are good 130/90-15 tires that are grippy and handle well. Going to a larger 140/90-15 will slow the handling down a little bit....the stock 140/80-15 size has very poor tire choices. Getting a little longer rear shocks (stock is 10.5") will help with the bumps as the longer rear shocks will have more travel that the 1.5" that the stock shocks provide, and it will steepen up the fork angle a bit. Shocks in the 11.5" - 12" look OK with the stock fender - if you get taller than that it starts to look like a dirt bike in the back. When I am riding the curves in my area of KY - I use very little HP and cruise along at 45 - 50 mph on the straight sections, and try not to slow down too much in the corners. My modified engine makes a good bit more power than a stock engine - but I don't use it much on my local rides. When we go to ride the areas in TN/NC and are in the mountains - I really like the extra power when coming out of the uphill turns! I also don't use high gear of my very tall (double Kawasaki pulley) gearing while in the curves - but when I need to get home in a hurry I can ride over to the 4 lane highway and make good time on the way home......a sustained 75 mph is not a strain as my engine is only turning 4,200 rpm! :) |
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Title: Re: 2007 S40 Thinking About Mods Post by R1_Cowboy on 03/28/17 at 12:37:09 Thanks everyone for your input, just to clarify dad has been riding for ever!! This is not his first rodeo... The goal of the top end improvement is to change the rpm and power range at highway cruising speeds. After reading up on some of the different mods I think we will start with: K&N air filter dyna exhaust with donut modification rejet and tune front fork stiffener rear shocks tach chain conversion test ride and evaluate :) can anyone point me in the right direction for the rear shocks we are thinking 11" or 11 1/2" progressive but not sure where to buy. |
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Title: Re: 2007 S40 Thinking About Mods Post by verslagen1 on 03/28/17 at 12:56:22 We have an extensive collection of tech articles. peruse the index for your interests. See the link below? |
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Title: Re: 2007 S40 Thinking About Mods Post by Dave on 03/28/17 at 12:58:34 Shocks for the Intruder 800 are 11.5", and are reported to work well on the Savage. |
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Title: Re: 2007 S40 Thinking About Mods Post by batman on 03/28/17 at 20:40:56 PhilthyMike,the single biggest change for torque/horsepower, is your larger/higher compression piston,it pulls in a larger volume of F/A mix,and compresses it to a higher degree, increasing Hp(9.5% @ peak torque)and throughout the entire RPM range.The after market cam is very mild, in our bikes and is merely frosting on the cake. |
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Title: Re: 2007 S40 Thinking About Mods Post by batman on 03/28/17 at 21:01:13 R1-cowboy ,I like your list of mods ,except the last one,I believe going to chain drive may be counter productive for the use you intend.the TDI ignition has about 5 degrees of advance which plays out at about 5000 RPM (that's about 80 mph in 5th gear) ,unless you think you'll be going faster in the twisties ,going to a higher ratio with chain drive may hurt your performance. |
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Title: Re: 2007 S40 Thinking About Mods Post by Dave on 03/29/17 at 04:29:09 2B283D2428277D71490 wrote:
I don't believe the goal is performance....the goal is to reduce the rpm at highway speeds so that the engine is not turning 4,342 rpm at 65 mph or 4,676 rpm at 70 mph . The stock engine can handle a modest gearing change fine, and it makes the bike a lot more relaxing to ride on the highway. Several of the forum members have made a gearing change and are happy with the results. The Kawasaki front pulley change makes an 8.7% reduction in rpm at cruise, and owners report the change doesn't make any noticeable "seat of the pants" difference in the acceleration. You could do a similar 9%-10% change using sprockets and get a bike that is nicer to ride when you have to do the 60-70 mph highway speeds. When you make the gearing change - you most likely will use the bottom 4 gears when riding the twisties.....and the taller 5th gear will become the overdrive gear for use over 60 mph. And when you want to see how fast you can go - it may well be that 4th gear will get you the highest top speed. |
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Title: Re: 2007 S40 Thinking About Mods Post by justin_o_guy2 on 03/29/17 at 04:51:38 Recommend a careful test of speedometer accuracy before any changes. The stock setup is usually a bit optimistic. Just going to the 140/90 rear tire got the 2005 real close. The 02 has saddle bags and brackets and won't take the bigger tire. If you're wanting to change things at all, I'd just get the exhaust freed up, tune the carb and go with a 140/90 rear for starters. See how that goes and if you want more, there are things that can be done. Certainly a fork brace to firm up the front end. |
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Title: Re: 2007 S40 Thinking About Mods Post by philthymike on 03/29/17 at 07:49:45 6B687D6468673D31090 wrote:
Thanks for the explanation, I had it in my head that the cam was mostly responsible for the improved powerband. As for the shocks I'm really happy with the 2nd hand 11" progressive 412's I'm running. Overall handling is much improved and on the highway I'm not airborn over every nasty bump anymore. |
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Title: Re: 2007 S40 Thinking About Mods Post by Dave on 03/29/17 at 07:56:44 The Wiseco piston upgrade is nice and I love mine - it requires a significant investment in time and money. The other mods can be done with relatively little work - the piston upgrade requires the engine to come out of the frame for installation. You then need to buy a piston, have your cylinder bored...buy a head and base gasket, and the cost adds up pretty quickly. However.....it really does provide a noticeable change in the personality the engine. |
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Title: Re: 2007 S40 Thinking About Mods Post by Gary_in_NJ on 03/29/17 at 08:29:05 I thought that the head and cylinder could be removed without removal of the engine. I seem to remember reading in the FSM that in order to remove the engine that the head has to be removed. When I was doing the conversion of my bike I tried in vein to remove the engine while it was in tact so I could paint the frame. In the end I just painted around it (I was doing more damage trying to remove the engine). |
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Title: Re: 2007 S40 Thinking About Mods Post by Dave on 03/29/17 at 09:57:48 6F65616B60696D643A3C38080 wrote:
The cylinder head cap can be removed with the engine in the frame....there is one bolt that makes it a bit fiddly - but it can be done. The cylinder head cannot be removed with the engine in the frame - as you can't lift the head high enough to get clear the cylinder studs before the head hits the top frame tube. A few folks have suggested that you could remove the cylinder studs after you take the nuts/washers off the top - however I doubt you can get good enough access to the studs to double nut them in any way that would successfully allow them to be removed.....there is a very small amount of stud sticking up above the head. One member did take the motor mounts off, and then tip his engine sideways in the frame to allow the head/cylinder to be taken off. |
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Title: Re: 2007 S40 Thinking About Mods Post by LANCER on 03/29/17 at 11:15:45 Yep, the engine can be removed if all the engine mounts are removed, the belt/chain disconnected, and a few other things, and the engine tilted forward and to the right side. However, after going to all that trouble you might as well pull it the rest of the way out and put it on the bench. It is much easier to work on that way. |
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Title: Re: 2007 S40 Thinking About Mods Post by batman on 03/29/17 at 14:54:53 My old 95 will do 90 mph with just a Dyna ,spacer mod and carb tuning,and a140/90/15 tire. I'm not readyto spend the money it takes to go 10 mph faster,and if you think a chain conversion is saveing you money on fuel that's wrong ,for any added miles mpg is offset buy the higher price of the high octane fuel you'll need to burn and if your doing under 60mph your in 4th gear passing up the reduction you'd have in 5th .If you can't stand the higher vibs ,you need to buy a bike with more cylinders. |
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Title: Re: 2007 S40 Thinking About Mods Post by Dave on 03/30/17 at 04:31:06 57544158545B010D350 wrote:
The Savage has 5 degrees of advance below 2,000 rpm.....then the advance increases as the rpm rises.....up to about 30 degrees total advance. This means that as the rpm increases, the ignition advances to provide the spark at the proper time. It is not computerized with knock and temperature sensors like a modern fuel injected engine - but the technology is about equal to the CV carb in sophistication. You can cruse at 3,500 or 4,000 rpm quite nicely....the engine doesn't suffer in any way, as the engine is designed to run well at any rpm between idle and redline. We have 2 sources for the ignition advance curve. One is the Suzuki Shop Manual: 7D4A4A435B474641482F0 wrote:
Another member used a signal generator and oscilloscope to figure out what the advance curve was. He admitted his equipment was a bit old and there could be some inaccuracy in his results - but he found that the advance kicked in after 2,000 rpm, and that it advanced pretty quickly up between 2,000 - 5,000.....and then leveled out. His results are pretty much in agreement with what the Suzuki Shop Manual says - however it does not provide actual values for the amount of the advance: 6F7C6967737B6F7C7A731D0 wrote:
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Title: Re: 2007 S40 Thinking About Mods Post by Dave on 03/30/17 at 05:15:01 2D2E3B222E217B774F0 wrote:
Batman: You and I sure are at odds over this gearing issue. It is not about getting a higher top speed or faster acceleration. The goal is to be able to reduce the engine rpm a little bit when cruising on the highway. It is a change that works very well and many of the members on the forum have changed their gearing (either by the Kawasaki pulley conversion or by going to a chain and sprockets)...and they are happy with the results as it makes the Savage better suited to their riding needs. It would have been nice if Suzuki made the ratio between 4th and 5th gear a little bit wider and we wouldn't have to consider the gearing change - unfortunately they didn't.....and changing the final drive ratio and rear tire diameter is the fastest/easiest/cheapest way to get it done. Making a gearing change of 8-10% isn't a drastic change and it only drops the engine rpm a few hundred rpm - but that small reduction in rpm is enough to make the ride more peaceful and help to reduce the oil loss/consumption that occurs when the engine is run for sustained periods over 4,000 rpm. The engine doesn't overheat as a result of the lower rpm - in fact when I made the change my engine temperature dropped 20 degrees when I tried a sustained 70 mph test run on a 90 degree summer day. The members with stock engines don't have to switch to premium fuel as a result of the gearing change....the 8:5:1 compression ratio runs fine on regular fuel with our without a gearing change. When in the lower gears the bike pretty much rides just like they used to.....the rpm that provided 35mph with the old gearing will now be 38 mph, the old 45 mph will now be 49 mph....the 12 mph speed in 1st gear though the parking lot that used to require 2,113 rpm will now be 1,945 rpm. I believe that R1_Cowboy will accomplish exactly what he wants with a gearing change......a bike that is more relaxed at highway speeds. |
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Title: Re: 2007 S40 Thinking About Mods Post by batman on 03/30/17 at 11:24:44 Dave ,I was all wet about the timing (Brain fart)but RC's post was about more performance on twisty mountain roads ,not the super slab.we all should be able to agree that the mods he listed would vastly improve the way the bike runs over stock,except the higher gear change I would think that the closer ratio of the stock bike would better serve him in the twisties ,he said nothing about highway riding in his post. |
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Title: Re: 2007 S40 Thinking About Mods Post by justin_o_guy2 on 03/30/17 at 11:32:35 I just did the front pulley. It's different. I keep it in second a bit longer. And third, in later, into fourth later. But the bike will Do everything it did before. There's nothing to force anyone to change gears so soon that it can't pull. |
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Title: Re: 2007 S40 Thinking About Mods Post by Dave on 03/30/17 at 11:48:59 47445148444B111D250 wrote:
Absolutely......the stock gearing is the way to go if you are going to run around on curvy mountain roads.. That is likely the reason you and I weren't thinking the same, as I felt he was satisfied withe the performance in the mountains - but was looking for a bit better manners on the highway. The first post was confusing about what he was after. Later on he did some clarification that I interpret as being a gearing change to make the bike better suited on those rides where they got out on the open highway. 466E676A6564666A0B0 wrote:
Several of us have done gearing changes to allow better manners on the highway - and yet the lower gears still provide plenty of thrills in the mountains and curves. In fact the performance in the twisties might be a bit better, as you don't need to shift as often. Serowbot tried the Kawasaki pulley, and didn't like it for his riding as it changed all the shift points away from what he was used to. MMRanch likes his for long trips - but his CMA group rides in parades and the taller first gear gets him going faster than the other fellows. There are 3 of us (me, MMRanch and badwolf) that have done the double Kawasaki conversion....and this is a really big change in gearing (12.15%) - and it does make for a very nice cruising speed at the expense of acceleration......5th gear does become the gear you use for speeds over 60, and the bike runs out of power to pull that gear around 85mph - if you want to go faster you have to shift to 4th and get the rpm up. The change in gearing that falls in the 8% range really does make the Savage a better "all around" bike. |
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Title: Re: 2007 S40 Thinking About Mods Post by batman on 03/30/17 at 11:56:38 JOG but a stock bike will accelerate faster. |
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Title: Re: 2007 S40 Thinking About Mods Post by Gary_in_NJ on 03/30/17 at 12:49:53 Math time: The primary drive of the LS650 is 1.8100 and 5th gear of a stock LS650 has a gear ratio of 0.8846. With my 18/52 sprockets (2.889 ratio) and 130/70-18 tire, the final drive ratio is 4.6256. This results in the following speeds at the shown rpms: 30 mph = 1,854 40 mph = 2,473 50 mph = 3,091 60 mph = 3,709 70 mph = 4,327 80 mph = 4,945 This compares to the OEM tire (140/80-15) and stock secondary gearing (23/68): 30 mph = 2,005 40 mph = 2,674 50 mph = 3,342 60 mph = 4,010 70 mph = 4,679 80 mph = 5,347 This is a 300-400 rpm difference at the higher freeway speeds. That difference is felt via reduced vibration. Even with the more relaxed gearing, my bike will accelerate faster because of the 60-70 pound weight reduction - and because I'm at the controls :) |
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Title: Re: 2007 S40 Thinking About Mods Post by batman on 03/30/17 at 14:25:17 Looks like If your doing 60 I can slow to 55 an feel the same relaxed vibration? |
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Title: Re: 2007 S40 Thinking About Mods Post by justin_o_guy2 on 03/30/17 at 15:48:48 Just don't do it.. |
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Title: Re: 2007 S40 Thinking About Mods Post by Gary_in_NJ on 03/31/17 at 13:23:09 3F3C29303C3369655D0 wrote:
Slow down 5 mph? No one has ever done that. |
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Title: Re: 2007 S40 Thinking About Mods Post by batman on 03/31/17 at 18:06:27 I wouldn't feel the need to .I did always wonder if anyone who went to bigger piston had ever tried to measure the difference in weight between them and a stock piston?It seems certain that no one ever made an adjustment to the counterbalance shaft if there is a difference,maybe these motors have more vibration. |
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Title: Re: 2007 S40 Thinking About Mods Post by smokin_blue on 03/31/17 at 20:26:16 If your goal is to make the bike a better cruiser (lower rpms and maybe more fuel tank size) than maybe give my thread on my wife's bike a read. This was my attempt to build what I thought would be a better S40 for putting on more than the 20 mile Saturday boulevard run. http://suzukisavage.com/cgi-bin/YaBB.pl?num=1453341892 |
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Title: Re: 2007 S40 Thinking About Mods Post by zipidachimp on 03/31/17 at 23:16:58 R1 Cowboy: Hi, where are you, I'm in Surrey. Did the mountains last year in a civic, this year on a bike. Cheers! 8-) |
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Title: Re: 2007 S40 Thinking About Mods Post by Dave on 04/01/17 at 03:12:03 5053465F535C060A320 wrote:
I have weighed the piston, and the difference is very small.....the forged Wiseco is machined differently than the stock piston - so they can cut the weight down even though it is a larger piston. I had those weights written down on a sticky note stuck to my bulletin board at work - but I moved to a different office and I threw it away when I moved. At steady speeds the Wiseco doesn't make any more vibration - under hard acceleration I can feel the power pulses are stronger......and the compression braking is stronger. |
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Title: Re: 2007 S40 Thinking About Mods Post by batman on 04/01/17 at 07:34:15 Thanks Dave,good to know that the weight isn't a problem. |
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Title: Re: 2007 S40 Thinking About Mods Post by LANCER on 04/02/17 at 03:46:20 The weight difference between a stock piston and a Wiseco is only a few grams. I've not noticed any adverse issues at all when making the swap. Even 101mm piston is still within a few grams from the stock piston, though if the cylinder is bored to accept it the bottom of the cylinder is paper thin, and likely to self distruct. The cylinder wall at the bottom would be just under 1mm think. |
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Title: Re: 2007 S40 Thinking About Mods Post by Ruttly on 04/02/17 at 21:44:25 Wow , 101mm piston!!! Who makes that ? Do tell. |
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