CYLINDER WORKS CYLINDER ONLY 95.00/STD YAM - 422-20003The Cylinder Works 95. 00mm Standard Bore Cylinder for Yamaha is a direct fit engine replacement cylinder built for riders who want a stock spec rebuild without sacrificing longevity, making it the go to Cylinder Works 95mm standard bore cylinder Yamaha replacement on the market. It's designed to drop into your Yamaha engine bay exactly where the original sat, matching a 95. 00mm standard bore diameter so you won't be chasing fitment issues mid build.