The 901/901-TM Pro Tuner kit is a fully adjustable weight kit for the 900 ACE Turbo with pDrive primary clutch.

Designed as a high quality billet steel flyweight set to help satisfy the demand from performance shops, racers, and those clutch tuners who modify the ECU programming or add extra Horsepower and need extra weight added to the flyweights. This kit is designed to allow the use of more weight.