Join Date: Nov 2009
Location: Lander, Wyoming
I'll suggest, Normal.
Mechanical valve tappet clearances are 'best' when you can just hear them. I assume that you adjusted to 'just snug' on the thickest feeler gauge, but not beyond.
The KACR only operates at speeds Below about 800 RPM. So yes one will see a lot of movement of the KACR at kick-start speeds (200-400rpm). They are kind of crudely built.
With the engine running, turn the idle speed Down. One will usually hear a couple of 'klack, klack, klacks' just before the engine dies. That is the KACR re-activating.
One could set valve tappet clearances to minimum specs and do it twice as often, to keep the ticking of the valve train to a minimum.
There is not a "doo-hickey" in the KLR250 engine.
Modify at "YOUR OWN RISK"!
Still riding my 1987 KL650-A1. 85,000+ miles & counting