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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Another Newbie Question /cgi-bin/YaBB.pl?num=1211293510 Message started by Rkems on 05/20/08 at 07:25:10 |
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Title: Another Newbie Question Post by Rkems on 05/20/08 at 07:25:10 Hi all, I have an 07 S40 with about 4000 miles now. Completely stock. I know rejetting carb & replacing exhaust, and similar mods can improve bike performance, but I'm fairly happy with the way the bike runs already. Are there any other disadvantages to simply leaving it stock? (shorter engine lifespan, etc.?) Thanks! |
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Title: Re: Another Newbie Question Post by Savage_Rob on 05/20/08 at 07:45:06 About the only disadvantages I can think of are: 1) She's very lean when stock and that means running hotter. 2) You might consider a verslavy (or similarly modded) camchain tensioner for peace of mind to prevent catastrophic separation. Note: Comfort and handling can be improved with simple upgrades to the shocks and seat and the addition of a fork brace. |
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Title: Re: Another Newbie Question Post by T Mack 1 on 05/20/08 at 07:57:30 Disadvantages.... hmmmmm The Lean condition that Suzuki has the bike adjusted to meet the EPA standards for "off the factory floor" requirements will cause the engine to run warmer. You most likely will get a discoloration of the exhaust pipe so it will not look as nice. You will also have to be more vigilant on monitoring your oil because it helps dissipate the heat and will have a slightly shorter life with the heat. Some will argue the a properly tuned carb will be more efficient thus giving even better fuel economy. Counter argument is "What is properly tuned?".... I've been told that the EPA "Lean" is good for "off the factory floor", but it will cause other types of pollutants due to the heat reacting with the other chemicals in the fuel which isn't part if the EPA tests. Also, I've been told that it will cause to bike to change in a few years of riding to be more polluting (not sure why...maybe the heat causing parts to wear faster ???). |
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Title: Re: Another Newbie Question Post by Mr. Hyde on 05/20/08 at 08:44:32 If you want to see what running lean will do to your header pipe take a look at this: http://www.trader.ca/powerpage/details.aspx?vlotid=89381&adid=6978408 And from a bike dealer no less. |
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Title: Re: Another Newbie Question Post by Savage_Rob on 05/20/08 at 10:04:04 I'm not a metallurgist nor an engineer but in my mind increased heat translates to reduced engine lifespan - especially in hotter climates. |
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Title: Re: Another Newbie Question Post by T Mack 1 on 05/20/08 at 10:09:47 7644534442407A774A47250 wrote:
Agreed....and in summer rush hour stop & go traffic..... |
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Title: Re: Another Newbie Question Post by vtail on 05/20/08 at 10:16:18 Yep those high temps are murder on your exhaust valves and exhaust valve seats. Ideally the exhaust temp should be in the 1200 degree range, stock they look like they run in the 1500 to 1600 degree range. Mine header(down)pipe still looks like new with 6500 miles on. Did carb mods right after I got it. ;) |
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Title: Re: Another Newbie Question Post by verslagen1 on 05/20/08 at 10:30:36 477E707866150 wrote:
How about safety? You are nearly invisible out there. If they can not see you, or hear you, then they will touche you. And that is to be avoided at all cost. You don't need pipes that rattle the windows for miles around, but do get one that any cager can hear over their cell phone, while they're shaving and slurping a latte. And get a decent horn, post the stock one on fleabay and get an airhorn that will rattle windows for miles around. My rear brake squeals like a banchee, I've decided that I'm leaving it that way. When I brake I want people to know that I'm braking and if it makes all their hair stand on end so much the better. :o BTW, I am an engineer, heat degrades life by an order of magnitude. Lean air/fuel mixture means hotter exhaust gases. Everything in contact with those gases are hotter. |
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Title: Re: Another Newbie Question Post by Steve M on 05/20/08 at 10:46:59 leave it stock and you could end up like my savage. 19,000 miles and one exhaust valve stem failed and snapped in half. >:( Most definitely due to running too lean / so too hot, (aggravated by an aftermarket exhaust that was fitted before I bought the bike). My replacement engine will have new exhaust valves fitted and run a 155 main jet, plus the idle screw is coming out a turn or two. 8-) |
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Title: Re: Another Newbie Question Post by demin on 05/20/08 at 14:22:48 Just a rejet will help cooling dramatically.If it's good enough for aircraft it should be good for the Savage. |
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Title: Re: Another Newbie Question Post by jomiyo on 05/21/08 at 05:36:43 how would one acquire necessary parts to rejet stock carb on his own... new screws, because i know they are going to gum up on me... larger main and possibly larger idle |
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Title: Re: Another Newbie Question Post by PhotoProf on 05/21/08 at 06:31:52 Logically, it would seem that riding speed should factor into the equation... faster = hotter engine temperature. From the research I have done, mileage suffers significantly as speeds increase (at least in cars). So, if more fuel is being burned per mile, the hotter the engine will also be. I have over 1000 miles on my 07 and pipes look good. |
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Title: Re: Another Newbie Question Post by Steve M on 05/21/08 at 09:13:50 Jomiyo if you go to http://www.alpha-sports.com/suzuki_parts.htm you can get all the parts for LS650 Savage. I live in the UK and even though they are in USA I have bought quite a few parts from them myself. If you want the bigger jets, as in 1986 to 88 model just browse to 1988 lS650 and it has the jets (and all other carb parts listed), later models list the 130 and 145 main jets. I think the later models had a different slide, needle jet and needle as well as the main jet? But if you just fit a bigger main jet and pilot jet then you will get a cooler running engine with a better idle and better mid range. |
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