143cc Race Head V2, Big Bore Kit, and Mikuni VM 26mm Carburetor Performance Kit: New Zongchen (ZS) Race Head with Billet TB Cover Set - 28mm intake and 23mm exhaust valves (25mm intake ports and 21mm exhaust port). Larger valves and ports for significantly increased performance over the stock head. Light weight high compression domed 60mm piston kit. Now includes a cam with more lift and duration, and light weight cam sprocket. Mikuni VM26 606 series carb, with 3 different jets - stock is 190 - extra jets are 155, 165, & 175. This kit also includes an all aluminum ceramic coated cylinder. This cylinder is lighter than a steel sleeved aluminum cylinder, reduces friction (increasing power). Our head gasket kit also includes a head o-ring set and exhaust gasket so you don't have to re-use your old ones.These are high quality parts and require no machining to the cases or other modifications - bolt on and go!
This kit is special order - allow 7-10 days.
Specify year when ordering.