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
![rock :rock:](./images/smilies/rock.gif)
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.