whats the best piston stock bore for mx racing

[florentino]

whats the best piston for a stock bore or should i go stock please help i am doing a motor for a girl shes on a low buget.

[jonboy]

I would say JE has proven themselves for me. I havent heard of many issues with them compared to wiesco and namura.

[nighthawk99]

Im running a 95.5mm JE piston in my z, I love it.