Anyone have an idea what it should be? My son's 250 started ticking VERY loud yesterday morning so I pull the valve cover off. There was WAY too much clearance between the valve and the rocker arm adjustment screw. I set it so it "felt" like the intake, obviously didn't screw it down tight. It ran fine all morning, no more noise until later, and I found it had way too much clearance again. I cleaned the screw, the locking nut, and the threads in the rocker arm with carb cleaner, and locktited it. I don't know if it was backing off or what.

The weather here sucks today so I guess we'll see how it goes tomorrow.

 

Apparently the LockTite is what it needed. It ran today with no problems. I traded my son my Hawkeye for the 250 for awhile. The 250 is a BLAST to ride.