Erratic Idle

6 replies to this topic
  • MMH

Posted 06 August 2009 - 01:09 PM


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?

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • john01

Posted 07 August 2009 - 08:31 AM


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.

  • thumper dad

Posted 07 August 2009 - 05:09 PM


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.

  • john01

Posted 07 August 2009 - 08:29 PM


You are very welcome. It was driving me nuts and my grandson.

  • warrick75

Posted 12 August 2009 - 07:08 PM


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

  • thumper dad

Posted 13 August 2009 - 04:52 AM


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.

  • john01

Posted 15 August 2009 - 06:51 AM


Good deal.

Related Content


Honda CRF50F 2012 by ThumperTalk

Honda CRF50F 2012
  • 0 reviews

Honda CRF70F 2006 by ThumperTalk

Honda CRF70F 2006
  • 1 review
  • Last review by OES03
  • On 09 April 2014

Honda CRF50F 2005 by ThumperTalk

Honda CRF50F 2005
  • 1 review
  • Last review by DANO
  • On 21 April 2013

crf 50 oversized carburetor by anger806

Dirt Bike   Make / Model Specific   Honda   XR/CRF 50/70/110
  • 3 replies

Honda CRF50F 2011 by ThumperTalk

Honda CRF50F 2011
  • 0 reviews

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

Register Close
If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.