Sign in to follow this  
Followers 0
MMH

Erratic Idle

7 posts in this topic

I have a CRF50 & a CRF70. They both have eratic idles - not terrible, but wanders around more than I like it too. I heard that the likely problem is a plugged pilot. How do I remove the pilot & clean it?

Share this post


Link to post
Share on other sites

Well I read you couldn't remove them but on my grandsons bike that I picked up used I removed it and cleaned it. It's not necessary if you have an air compressor, very small wire, and carb cleaner. I was curious so I removed it. This cleaning didn't help the idle. It would go up, down, and hang just all over the place. I would get it close and it would change. I ended up checking the valve clearance. The intake valve was way to tight. I adjusted it and the bike now runs way better and idles like a champ. He can now take off in third gear where before it struggled in second. You may also want to check your air filters.

Share this post


Link to post
Share on other sites

I had noticed the same thing on my crf70. I had a rpm gauge on it and it bounced up and down. Same problem with starting in second, I think I'll check the valves. This was just the info I was searching for, Thanks.

Share this post


Link to post
Share on other sites

I will check that as well, I just got my son an 02 XR 50 from a friend and the idle would jump around as well, tend to stay high after letting off on throttle. I cleaned the carb, changed the plug, cleaned the filter so I will now check the valve clearance.

Thank you

Share this post


Link to post
Share on other sites

I checked the valves in our 70, and the intake was too tight, It still bounces a bit at idle but not as bad as it used too. I dont notice any difference driving, but Then again the bike wasnt made to haul around an adult. Ill have to ask my son if he noticed if it felt better.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0