2011 Yamaha YW50 Zuma Reed Valve Systems
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- Moto Tassinari®VForce 3 Reed Valve SystemYamaha YW50 Zuma 2011, VForce 3 Reed Valve System by Moto Tassinari®. The VForce reed valve system by Moto Tassinari has been the reed valve system of choice by anyone serious about two-stroke engine performance for the last 10+ years....Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$135.53