New for 2010 - Takegawa 138cc bore and stroke kits for the CRF50 XR50 and Monkey bikes taking the CRF engine to all new and unmatched power and performance.

Patented SCUT piston and cylinder technology has increased the available displacement from base CRF 50cc to an amazing 138cc with no case boring required! Redesigned and specially treated all new crankshaft is more fatigue, seizure, and corrosion resistant than standard crankshafts.

Complete 138cc SCUT kits are available with the proven +R Superhead, Twin Spark, and DOHC Takegawa heads included. All kits come with all aluminum, ceramic coated SCUT cylinder, forged aluminum SCUT piston, Takegawa new coated crankshaft, S Series decomp camshaft, and all required parts to install and complete this top of the line build.

• MM-1294 - 138cc SCUT +R Superhead Bore and Stroke Kit
• MM-1295 - 138cc SCUT +R Twin Spark Superhead Bore and Stroke Kit
• MM-1296 - 138cc SCUT DOHC Bore and Stroke Kit