07 150RB start/idling problems

[Levi95]

There are probably dozens of threads about this but I cant seem to find one with my exact problem. Last weekend I took my 07 CRF150RB out riding in the desert with my buddy and it was running great! Then I went to start it on Thursday and it was really difficult to start even with the choke on. I let it run for about 3 minutes with the choke on to get it warmed up, took the choke off and it just died. I continued to have the problem, start with choke on, dies when i take the choke off. I managed to keep it running a little bit longer by revving it, but when i did that it popped really bad. I tried adjusting the air/fuel mixture screw but no luck. I'm running 135 main and a 45 leak jet. If anyone can help me out, it would be greatly appreciated!

[tenaja]

sounds like you got sand in your pilot.

[Keith72]

sounds like you got sand in your pilot.

+1 check to make sure you pilot jet is clear. And check your hot start plunger to make sure its not stuck open.

[Levi95]

Thanks guys! My dad took all the tools out of town for the weekend so it looks like i have to wait a few days to pop open the carb.

[walent215]

valves...clearance has probably zeroed out and they need an adjustment....was having same problems with my sons...we shimmed them and now it runs and starts alot better...i ordered a new top end and intake valves and will probably just replace everything together once the intake clearances start to move again...

[Levi95]

I'm really hoping its not the valves, I guess we'll see though.

[Keith72]

valves...clearance has probably zeroed out and they need an adjustment....was having same problems with my sons...we shimmed them and now it runs and starts alot better...i ordered a new top end and intake valves and will probably just replace everything together once the intake clearances start to move again...

I would say valves too but he says it starts but as soon as he turns off the choke it dies. And the popping sounds like a lean condition.

[mxracermx]

Intake valves!

[HRCNICK11]

Start with the carb mine does the same when the pilot is clogged I have been draining my carb after each ride. If I leave gas in the carb for more than a week or two it is a pain to start and needs the pilot cleaned.

[realfun1]

My sons bike has a hanging idle issue. I think it's the pilot. Can you remove it without pulling the carb?

[walent215]

yes...just loosen the the carb,twist it outward a bit and take the 17 mm drain off the bottom of the carb and you can change it out no problemm.