So I'm helping my buddy with his blaster and it's been a nightmare. Rebuilt the motor put new crank bearing weisco crank seals and honed topend with weisco piston. Started great and ran great took it out 3 times has probably 10 hours on it then went to take it out yesterday and it was a biotch to start. Probably 10 kicks finally got it started went to ride sounds like crap and kept bogging down no power. Changed the spark plug checked compression it's at about 110psi and getting spark and fuel. I'm running 40:1 gas mix any suggestions what could be the problem?