300ex bore

[Trxman300]

ok i was thinking about boring my 300ex out .080 over. that is 80cc's right?

how much is the average price to get my head bored? do i need to do any other work if i go this many cc's? i was also thinking about doing a .040 or .060 bore. let me know what you think!

[Dylan227]

.80 over is not 80cc. with a stock crank it will take your 281 piston to about a 290 tops 2 mm over is only a dead on 300.