This is the largest bore kit available that does not require boring your engine cases for additional cylinder sleeve clearance. New aluminum cylinder, high-performance BBR MX camshaft with lightweight piston and gaskets are included in this complete and ready to go kit. Aluminum cylinder with plated aluminum sleeve.
Gasket kit including cylinder head, cylinder base and ignition cover gaskets. BBR Big Bore Kit - 88cc 411-HXR-7001.