Motoforce Racing now also offers spring seats with ball bearings, which minimizes the twisting effect of the torque springs. The Twist Control absorbs torsional forces and frictional losses are reduced.

Please note that using this seat will increase spring preload, which makes it necessary to adjust the variator. Please only use heat resistant lubricating grease!

ATTENTION: Only for 107mm torque driver units!!! Minarelli engines (Aprilia, Yamaha, etc.) have been using new clutches since 1998. Please check whether your original clutch has 2 shoes (d=105mm) or 3 shoes (d=107mm). You can also measure the interior diameter of the clutch bell, which should be 107mm for this spring seat!