Originally Posted by
downunder23
hi guys just wondering if you can tell me if the ninja jx .21 parts will fit into an os vspec crankcase?
Yes. it should be fine. I would use the carb washer that sits in the case of the VSpec. The JX21 case doesn't use the carb seal washer, but the VSpec case is machined to use it and a sealing o-ring recessed into the carb throat is there also.