after break-in i was getting 11.5 to 12min of runtime. now after 6 gallons or so its now runnin 9 to 10 min a tank. i have changed the front barring and played with the tuning on my carb. i loaned the motor to a friend for a race. i am thinking he may have ran my motor hot. it started loosing run time after he used it. down to 7 minutes or so per tank. i pulled the button off and the o ring was stuck i cleaned the button and put it all back together. its now picked back up to the 9 or so minutes runtime.

do yall think i should get another head button for it?

thanks