84' 250R Need Help

[Mack]

Hey guys,

Have an 84'R that seems to run fine until nice and warm. Once warmed up, whenever I bring it down to an idle it wants to rev really high. I was thinking it may be running lean so I took the carb apart only to find the guy I bought it from had a 120 main jet in it when the spec calls for a 130. I changed it and now have the 1/2 to wot power I was missing but it still wants to rev way higher than it should when I idle down. I have good compression maybe even a little high considering my gauge is 100% accurate 180psi consistently. All intake boots are tightened snug, exhaust flange to pipe is sealed with rtv, new plug ( with great spark) , fresh 32:1 mix, clean filter and carb, and idle and air fuel mix dialed in after a couple minutes of warming up. This problem doesn't happen til I've ran it for 5 or 10 minutes but stays consistent. any insight would be greatly appreciated. wanna get it dialed in before I go balls to the wall. also, there is no oil in the dry side of the case so at least that crank seal is good.

[dustrunner]

sounds like an intake leak to me .. if you start it will it run without the choke on ? i would spray carb cleaner on the intake boot when running to se if that reves it up = LEAK ? GOOD LUCK AND WELCOME

[HondaRidr]

It sounds like a air leak or your pilot jet is too small (or plugged).

[Mack]

It runs fine with the choke off. my pilot is the stock size and I've cleaned it with carb cleaner and blew it out with the compressor.