i have 1999 whizzer 100 miles it started acting up runs well for first 5 min then falls on it's face checked fuel, spark, carb gasket, fuel cap, removed fuel line from petcock good flow. removed baffle from exhaust and it barely runs when it was new i could pull the baffle and it had power. removed head to check valves and seats can't see any problems read about seats will they be soo loose i can move them or just when they are hot? i also put 120 psi air into the head with valves closed no leaking from intake or exhaust, took a compression test lower than 20 pounds, wondered about compression relief does it cause issues sticking open ?