HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
northernryder

compression

5 posts in this topic

Hello. i ran into a weird situation yesterday and i was wandering if anyone else has seen the same thing or has any suggestions. I was just doing some rutine maintenance and had the spark plug out. I put it back in and was going to start it when i notice that it was kicking over fairly freely without the decompression lever pulled (it was not stuck either-it looked normal from the outside). i was even able to kick it over with using my hands (definately a problem). i kicked it over about 20 -30 times, and the compression started to come back to what seems to be normal, then she fired up and ran normal? what the heck is going on? The only thing i can think of is that maybe some dirt got in thrue the spark plug hole and held a valve open or something. Matt.

Share this post


Link to post
Share on other sites

Matt,

Your problem has been seen before by at least 2 other TT'ers. It may be directly linked to your compression release.

Both other guys compression came back as well.

Share this post


Link to post
Share on other sites

i've had it as well and so have so many others. don't panic!

basically if they decide not to start and you kick them over long enough they seem to lose compression. my answer was to leave it alone for about 3 days as well as fresh fuel and plug burnt off on the gas cooker.

the bike started up and when i stopped it and did the compression kick it was solid again. it can't be anything but the rings and i feel it must be something to do with fuel wash on one face of the bore allowing the rings to sit off the cylinder wall on that side allowing the fuel charge by.

Taffy

Share this post


Link to post
Share on other sites

I agree with Taffy, most people have said they needed to pull the hot start to get it running, that is a definate sign of flooding, I think that it doesn't take alot of fuel to wash the oil off the cylinder wall.(Short stroke makes this a big issue). My WR would do that from time to time. After I got it running the compression would return. Don't worry about it.

Dave

Share this post


Link to post
Share on other sites

Matt, If there is no compression at the kick starter then there is a mechanical problem.

pull the valve cover and see if the valve bucket is staying down(or if it has way more clearance than normal)on the compression release side. The bucket will mushroom over slightly and cause it to "STICK" in the shim bucket bore. sometimes turning the motor over frees it temporarily BUT!!! you must remove the bucket and chamfer the top edge! because the problem will reappear and could bend that valve or worse if it hangs down deep enough, besides the damage it is doing to the bucket bore. PT

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