Ive wanted to rejet my bike, i have read the mod page for this on the website, the only difference is that i have KandN airfilter, everything else is stock. I dont want to install new jets and realise my bike runs badly.
I have reasonable experiance with carbs and should be easy to do, but was also wondering what sort of improvement would i expect to see with the performance of the bike? I.e. top end acceleration, speed, etc.
I have little funds for exhaust systems so i wont be upgrading the bike, i just want to get the best performance as cheaply as possible, hence why im rejetting. Anyone with relative experiance, help would be greatly appreciated.
if you have a US bike, then it's recomended that you rejjet with a 40 pilot jet...if you don't want to get a pod K&N and put on a high flow exhaust pipe then rejjet with 127.5 main and 40 pilot jets
if you plan on puting a K&N pod and high flow pipe then rejjet with biger main (i have a 150) and 40 pilot jet...
you will feel the difference in acceleration and your bike will warmup a lot faster
Depends on which model you have and from which market. EG, the 2001 onwards for Australia are very different from the same year models in the USA.
For general advice re CV carbs on high-revving engines (yes, believe it or don't the GS qualifies as high-revving in their book :dunno: ) try //www.factorypro.com. You might find it difficult to tune well if you have opened up the inlet (eg with the K&N) but don't also open up the outlet. It is possible, though. See previous posts and Pantablo's site. With the mild changes you are talking about within you budget, don't expect noticeable improvements in performance. You can improve the midrange fairly easily but topend is harder. You also stand to lose out in the economy stakes. Alot of tuning the carbs is "suck it and see" so be prepared to get very good at getting the carbs off and on again (I can do it in about 15 minutes!). Good luck.
If its K&N in the airbox well then 127.5/40/1 washer/3 turns like GRU said will work with stock pipe on a 89-00 US bike. The other countries have 40 pilots anyway so you can omit that. K&N pods... well people haven't gotten the bike to run perfectly with pods and stock pipe so I'd stay away from that. It should rev a bit quicker than stock, and lose that annoying stumble at low revs is you jet it. You may pick up a little more top end... but pipe does that a lot better than the K&N in airbox... BTW that airbox is another party pooper.... lousy for air flow K&N or not.
Cool.
Srinath.