Question about 1980 Yamaha XJ 650

1 Answer

My 650 will rev really high when started or not start at all

Some times it will start and others it won't. When I can get it started it will rev really high (5-6000). Any idea?

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Hi, Jared and the usual suspects are:
1. Throttle cables improperly adjusted or pinched.
2. Idle adjusting screw needs to be backed off.
3. Intake system air leak.
4. Fast idle choke ramp is not releasing.
5. Broken throttle return spring.
6. Damaged diaphragm or slide.
7. Faulty MAP, TPS, ATS, O2, VSS sensors or wiring/connector
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Yamaha XJ650 Idle Problem
1982 Maxim xj650 idle issues
Yamaha XJ750 Owners Workshop Manual
OEM parts for Yamaha
http://www.carlsalter.com/pdfs/Yamaha_XJ600SK_Owners_Manual.pdf

Posted on Jun 20, 2016

4 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 10 Answers

SOURCE: my dt 125 is not quite right, revs are stupidly high & carb leaks

your needle valve in the carb will probly have a little stone in and it is allowing to much fuel to go into the carb causing it to overflow

Posted on Jun 14, 2009

  • 15 Answers

SOURCE: bike will start &idle & rev but when

its either fuel or air, check the air box under the seat, clean the filter, then check the fuel filter. If this doesnt work I would say you have dirt in your carb main jet.

Posted on Aug 01, 2009

thunderalley
  • 432 Answers

SOURCE: radian revs really high and shoots gas out of airbox

manifold leaking. check carb to head gaskets and any vacuum lines that it has

Posted on Oct 03, 2009

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