Thread: How to test valve clearance on a 1973 ST90?

I took off the rocker arm covers but it is impossible to fit a feeler gauge down there to get in between the cam and the rocker arm, how the heck do you do it?

Honda makes a gauge that will go in there. It was $3 at the shop. You might try using a 1/4" wide feeler gauge and flexing it a little. It worked for me.