Question about 1991 Yamaha XJ 600
I installed a jet kit and now the bike will idle, once I touch the throttle, the bike will rev up to about 3000 to 3500 rpms for about 8-10 seconds. If I put a load on the motor, the idle returns back to normal. The problem seems to worsen and the bike get hotter...
The bike runs fine other than it is a little on the weak side until ou hit about 2500 rpms then it really smooths out...
Thanks for any suggestions...
You have an air leak(s) between the carb an the cylinder. The rubber seals and fiber gaskets are 19 years old and have become hard. Disturbing the carb has caused the old hard rubber to crack and let extra air into the mix. Fix the air leaks and the problem goes away. I have seen some guys smear silicon seal on the inside & outside of rubber manifolds. Often, 15 seconds or so in the microwave will make the rubber instantly soft again but only for 10 minutes or so. Just long enough to re-mount and clamp down. Obviously, new parts would fix the problem You can try Babbit's. Generally, if you can find a part anywhere, Babbit's is where it will be.
Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock. www.babbittsonline.com/pages/parts/viewbybrandand/parts.aspx
Go to this site and you can download a free PDF service manual.
www.carlsalter.com/motorcycle-manuals.asp Most all of the manuals are in English but some are not. There is no way to be sure without doing the download. You can always delete it if in a foreign language.
Can I get a Very Helpful rating for this answer? Thanks!
Posted on Jun 27, 2009
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Posted on Jan 02, 2017
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