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
darmino

Timing question

3 posts in this topic

How does the cdi Know when the engine is on the compression stroke and not the exhaust stroke when it fires the spark plug, it only fires every other revoltion right?. The reason I'm asking is bacause I have to reasemble my engine after some transmission work and when it comes to installing the cam's should I set them to compression or exhaust, both setting will be correct as long as the piston is at TPD but when will the ignition fire. There must be something that I don't understand. Please help!!

Share this post


Link to post
Share on other sites

actually, it doesn't matter. the ignition fires the spark plug at TDC no matter if it's a compression stroke or an exhaust stroke. mark summed it up nicely in this thread:

http://www.thumpertalk.com/forum/showflat.php?Cat=0&Board=UBB10&Number=144791

also, you may want to check out

http://www.thumperfaq.com/cam_timing.htm#Scratch

jim aka the wrooster

'01 wr250f

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