Cylinder and Piston Kit 447 Type Big-bore 750cc (9:1) [new design]
Big Fin Cylinder Block 750cc.80mm
castpistons-, pins, clips, and matching riken piston ring sets. this is a copy of the OEM Yamaha 750 kit pistons.ever made for the dirttrack homoligation.only with the latest modern thin piston rings.
High compression 9:1.
Kit Fits: 1974-84 447 XS/TX 650 Engines.
Check the conrod number! only for the 447 conrods!
order gaskets separated ! you need a 750 head and base gasket!
This cylinder is made for the latest type of Tensioner set, same as our HT-1704 set.
Better cooling and good looks of our Big Fin cylinder.