250R Won't idle

[AngusJustice]

My 85 honda 250R wont idle. idle and air screws make no difference when adjusted. Anyone got any ideas?

[rdlsz24]

Possibly an air leak

Rob

[AngusJustice]

Where would the air leak be?

[AngusJustice]

I talked to a mechanic friend he said could be the cranks seals? anyway to test those?

[Gearheadtom]

Try a new plug. My 200m, thoe 4-stroke, often won't idle because of a bad plug.

[Saul]

Where would the air leak be?

Cracks or holes in the intake boot?

[ChrisD]

If you had an intake air leak or a base gasket leak, you would be way lean and the engine would scream at idle.

So, your idle is too low I am guessing. The 85 carb is limited so my question is this. You may have to "negotiate" an idle. I would take any excess slack out of the throttle cable. Can you adjust the screw at the top of the carb out to increase the idle? I have not used stock carbs in a long time ago so please forgive me. You probalby have the stock cable and thumb throttle, do you?

2 strokes are funny. I constantly adjust my idle from when the motor is a cold running motor to a warm motor. When the bike is cold at startup, I have to increase the idle, but when the motor is warm, I have to decrease it.

Can you give us more detail?

[Daddio]

I think I'm feeling ill.http://forums.everything2stroke.com/images/smilies/obscene3.gif

[peter250r]

i had the same problem on my 86 250r. my problem was that the air filter had deteriorated so much that bits of it had been sucked into the reed valve.

i got it all out and it fixed the problem.

what kind of state is your filter in?

[AngusJustice]

air filter is in good shape and the idle adjust does nothing and im using a stock cable and thunmb control no slack in the throttle cable

[FastZ28]

Sounds like you got a peice of debris blocking your pilot jet. Pull the pilot jet out and inspect it . You should be able to see thru it, its a very small opening. If not blast it with carb cleaner and compressed air till its clear and put it back in.