300EX bore

[big bad beny]

what is the CC size on a 60 over piston on a 300EX

[HondaR]

0.50 is 286 so probly 287 go with 76mm that would be like 300cc 11.1comp

[2muchquad]

i believe .080 over is the 76mm piston...im pretty sure anyway

[HondaR]

2.00 - 76MM

[300ex_rider1121]

what would .60 over be on a 300 my cuz has .60 over

[HondaR]

.060 = 75.5mm bore(293cc) 18hp stock stroke

[Eddiesanders250]

so a 300 stock is 18 hp?

[HondaR]

sorry i meant with the 75.5 bore .060 over ..and the stock stroke..(65.5) you have 293cc...which is 18hp... stock is 17hp 74bore 65.5 stoke