High idle ???

Discussion in 'General Questions' started by Neufcruz, Apr 30, 2016.

  1. Neufcruz

    Neufcruz Member

    bike runs fine. Starts fine etc... Now, after I'm riding it and let off throttle, it stays at a higher idle than normal. After 10-20 seconds, it then settles down to normal idle. What would possibly cause this? Intake leak?
    Thanks in advance

  2. Hello Moto!

    Hello Moto! Active Member

    Sounds like it
  3. 45u

    45u Active Member

    Could all so be a leak elsewhere as well.
  4. It may be the slide or cable hanging up for the throttle.
  5. Hello Moto!

    Hello Moto! Active Member

    Anything new to report? Did you figure it out?
  6. Neufcruz

    Neufcruz Member

    No. Unfortunately I have been a little busy and out of town. I ride a few times and still the same. After riding it, and I let off throttle, it stays at ahighnufke for a little while(30secs) or do and then comes down.
  7. HeadSmess

    HeadSmess Well-Known Member

    intake leak and or idle mix too lean.

    the fact that it eventually settles down says its too lean, not an air leak. try lifting needle, if its the NT carb, cant do much else. never tried filing the base of the slide. that is an option but do read a few pages on carb tuning FIRST just so you understand what im talking about ;)

    and, it could simply be a sticky slide/cable. slide should SNAP back down when throttle released.
  8. jatgm1

    jatgm1 Member

    i had a similar issue but it just kept idling really high. turned out to be a leaking exhaust, blown gasket. but my throttle stuck at first and it did something like that. i just put a few drops of gear oil into the carb, then screwed the throttle cable thing back in.
  9. Neufcruz

    Neufcruz Member

    I have the Dellorto clone so no needle adjustment. When you say idle to lean. do I just turn up the idle screw?
    I can pull filter and take a look at slide to see if snaps back on release I guess.

  10. Neufcruz

    Neufcruz Member

    Is there a way to tell a leak without just redoing it all. When I installed the pipe originally, I pretty much gooped high temp gasket maker all around the exhaust manifold/gasket.

  11. jatgm1

    jatgm1 Member

    well you can put soapy water on it, but itll probably burn off b4 u can see if it bubbles if you run it. i guess put soapy water on it and have someone spin the tire when the clutch is engaged but with the killswitch held down to see if it makes bubbles? i say just redo it. ik its a pain, but its worth knowing its done properly. and when you add gasket sealant/maker, you cant just add it and then tighten it, i tried than and had issues, so instead i added it and left space between the exhaust pipe and the engine, then after an hour tightened it a little, then 15 minutes tightened it a little more, and so on and so forth until it was tight, that way the silicone stuff hardens when theres more of it between the exhaust and the engine and then you squeeze it tight. also, make sure the exhaust and the engine parts that your putting together are as flat as possible. also, you should probably get some kind of actual gasket to put in between the gasket goop. im no mechanic, but im yet to have leaks again. in fact the nuts rattled off the exhaust on one side and i thought it mightve been leaking, but when i took all the bolts off i noticed it was firmly in place and not leaking. if you know that its not the exhaust thats leaking though, make sure its not the intake, manifold, or the connection between the carb and the engine, or in between the float bowl and the carb. i basically just sealed the crap out of everything in one fell swoop to make sure i didnt have to deal with problems when i did it. its way easier to just completely re do everything and not have problems then to nitpick over which gasket is leaking. you could also just replace the carb with a better one, which i was considering before i resealed everything, to eliminate that factor.
  12. Neufcruz

    Neufcruz Member


    Will get new gaskets, and redo to at best eliminate that. Then go from there.