SpreeMadness520 wrote:Well I kinda hit a road block? I would go for a 125cc stroker spree but..I cant find anyone that will cut the cases for the crank. So what is the biggest bore that works with the stock crank? Thanks

49mm aluminum bore/piston on stock crank= 78cc
50mm on a stock crank= 82cc
51mm on a stock crank= 85cc
50mm on a 44.4mm ministroke crank =87cc
51mm on a 44.4mm ministroke crank = 89cc
(cc calculations are rounded off)
Question: Are you building this to race or to drive daily?
can't have your cake and eat it too.