TSP Billet Cylinder Head Yamaha YZ125/X High Compression mojodrive The closure system features contra-closure

The closure system features contra-closure

The top plate is hard anodized black and finished with a laser engraved Assault Industries logo

Works with OEM or RackBoss 2

2009 Honda Rancher 420 2x4

Make Model Year YAMAHA WR250F 01-13 YAMAHA YZ250F 01-06

TSP Billet Cylinder Head Yamaha YZ125/X High Compression mojodrive The closure system features contra-closureAll TSP heads and inserts now include a complete head gasket kit including inner and out cylinder o rings and head bolt crush washers. Everything you need to install your new TSP head or insert with all new o rings and seals. The TSP cylinder head for the Yamaha YZ 125 is higher compression than the stock head but still safe for 91 octane pump fuel with appropriate jetting. It offers improved bottom mid range power over the stock head and is best