[litenup]

im having trouble with my bike not running. while playing around with it i noticed i got a bit of fuel being blown back towards the airbox(currently removed). so i checked the valves settings. while playing around with this a bit, i noticed that on the non compression stroke at tdc, both valves are open a bit. so i set it to the smallest clearance i could get and turned it over to tdc compression stroke. tons of play in it. id have to use a few leaves to fill the gap. is this normal? any elaboration on the subject would be great.



jason

 

[jasonh]

You need to set the clearance on the compression stroke at TDC to ensure that no valves are open.

 

[litenup]

oh i know that, after playing around with it looking at the difference in clearance, i set them back to the proper settings. it just means that when at tdc on the non compression stroke the springs are compressed a bit. i was wondering if by chance anyone else had noticed this, or if something is wrong with my valves.

 

[jasonh]

Ok, I see what you're getting at. It's normal. That's why we have to set them on the compression stroke, because on the other strokes the valves are moving.