• M&D  Zenoah Cast 254 engine features
   
• Improved cylinder design with 4 transfer ports 
   
• High-rpm lightened single ring piston design
   
• New combustion chamber shape,
   
• Integral Sleeve for piston stability at high rpm
   
• M&D designs Zero Drag crank seals
   
• Big-bore Walbro WT-257 carburetor
   
• Engine comes broken in, with dynamometer graph showing HP/Torque vs. RPM

M&D Cast 254