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Zongshen CB250-F 74mm Big Bore Kit
74mm ZONGSHEN CB250-F BIG BORE KIT WITH 16mm WRIST PIN. IT IS THE BUYERS RESPONSIBILITY TO MAKE SURE THIS ITEM FITS THEIR APPLICATION.
THIS KIT IS FOR THE CB250-F ENGINE AND ITS VARIANTS. Stock CB250-F is 72mm bore x 61.5mm stroke for 250.4cc, this kit increases displacement from to 74mm bore x 61.5mm stroke for 264.5cc. Kit comes as pictured - 74mm cylinder sleeve, 74mm piston, piston rings, circlips, 16mm wrist pin, exhaust and head gaskets. This kit will increase hp but more so you will notice a substaintial gain in bottom-end torque, this depends greatly on the other mods you have, you can expect more power increase with the more mods you have i. Performance carb, exhaust, cam etc.
If your bike does not have a 16mm wrist pin, this kit will not fit!