I had a hard starting issue with my son's quad so I took it to the dealer to have them check it out for me...they said it had low compression (about 75 lbs) said that that was too low and needed a top end rebuild...Long story short, i did the rebuild and got it all back together and still has 75lbs compression---Am I missing something here? Any help would be appreciated. Thanks, Robert

P.S. It still won't run even though it has spark and fuel...