Finally an affordable race head for the CRF50 CRF70 from a quality manufacturer! The brand new R-Stage EM 88cc version up kit is a cost effective solution to increasing your S-Stage kit performance with a high flow race head. 26mm/22.5mm valves, redesigned combustion chamber and the ability to add in any of the R series performance decomp cams make this an absolute must for anyone with an 88cc S-Stage kit. This kit includes the EM head gaskets, and new piston kit with valve reliefs large enough to handle the new large valve head. Cast aluminum piston is molybdenum coated for durability and increased break in performance.

Note: Sport camshaft from your existing S-stage kit will work with this head  and is not included with this kit

• accepts R-10D R-15D and R-20D camshafts sold seperately
  
• MFG rated power - up to 11.5HP depending on cam choice, setup and conditions