I recently put Hot Cams, ESR CDI and a JE piston on my YFZ but it will not start now unless i push it off it runs better than ever but when i go to a race i have to jumpstart it off! Some have said too much compression so i needed a bigger battery so i got one and that didn't help still have to jump it off! Any advice out there please race is coming up soon!!!!!!!!!!!!

 

A battery wouldnt help you might need a more heavy duty starter. I would just put the kick start kit on instead, save a lot of money and some wieght that way.

 

Hey thanks for the advice your right a kick starter is what i need hopefully that will take care of my problem!