I need to replace the cr's piston. The cilinder isn't modified except the ports edges are smoothed. The piston is from a Suzuki. The top has been machined to shorten it. The shop that did the tuning does not exist anymore, so I can't ask them for a new one or ask if a stock piston will work or not. The suzuki piston doesn't have the window in the skirt the stock honda piston does. So does anybody know if this is known tuning method? And what piston will also work. Currently the bike is almost only topend wich comes in really hard, maybe the window in the stock piston will give it some more low end? Any other tips are apriciated. I've tried to find threads on this, but failed to find any.