Low compression, hard to start: Related?


1 reply to this topic
  • franktom

Posted September 24, 2005 - 06:37 AM

#1

Well this is my first posting. I've been browsing TT ever since I got my bike one year ago. I think this is a great site and have learned tons. Thanks to all of you! On to the problem...

The bike is a well worn (cosmetically) 92 XR600R. I believe it is stock except for a SuperTrapp exhaust and Uni air filter. When I got the bike it was spitting oil out of the exhaust - literally. I put in a new (.25mm over Honda) piston and had the cylinder rebored to match. That took care of the oil spitting problem. While I had the top end off, I lapped the valve seats because the were somewhat pitted.

After that I'm having a lot of trouble getting the bike started. When I do get it started, it runs really bad a low rpms (I have to continually rev it to keep it started). When I take it out for a test ride it runs rough and "surges" under constant throttle. I took the bike to a local Honda shop and they cleaned the carb and verified the jetting but that didn't do a thing (at least they didn't charge me for the "work").

Here's what I've done to try and figure this out:
- Changed out the gas (worth a try)
- Spark has tested good
- Timing has been triple verified
- Valve adjustment also triple verified
- Air filter is clean
- Plug is new and properly gapped

Any suggestions would be greatly appreciated. I see how passionate you all are about this bike but I have just had some really bad luck with it...Make me a believer!!!

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

Posted September 24, 2005 - 06:39 AM

#2

Sorry...I forgot to say that the only thing the Honda shop could tell me was that the compression was low (about 100 psi). Could this be at the root of my problem?





Related Content

Forums
Photo

Wiseco 101MM Spark Knock Low Engine Temps by imandrewparks


Dirt Bike   Make / Model Specific   Honda   XR600/650
  • 9 replies
Reviews

Honda XR650L 2016 by Chris.GVS


Honda XR650L 2016
  • - - - - -
  • 0 reviews
Wiki
Want to add a kickstart to your XR650L?  Here's how - last post by clc3251

Want to add a kickstart to your XR650L? Here's how


Articles
  • 1 reply
Forums
Photo

Post Apocalypse, ThumperTalk style! by Justin Pearson


Dirt Bike   General Dirt Bike Forums   General Dirt Bike Discussion
  • Hot  35 replies
Forums
Photo

XR650L super moto wheels by greggkklee


Dirt Bike   Make / Model Specific   Honda   XR600/650
  • Hot  29 replies
 
x

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.

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.