Use of the new â€œHPV Rollerâ€ secondary clutch that debuted on the 2005 Mach Z is expanded for 2006 to all X models (except the 550X) and the Summit Highmark. The state-of-the-art roller-type clutch delivers an improvement in upshifting and backshifting performance and consistency, with crisp, smooth acceleration and higher top-end speed as well. It is also specifically designed to work hand-in-hand with Rotax Electronic Reverse.
This new secondary is a roller-type with three large rollers fixed to the inner sheave. It eliminates free play in extreme backshifting situations for smoother and quieter operation. A double-helix cam (encapsulated roller) is designed to engage the RER in just five degrees of rotation â€“ a huge improvement over the HPV secondary, reducing the â€œclunkâ€ from the secondary when using RER. The HPV Rollerâ€™s reduced cam force and friction also enables the belt to run cooler, for longer belt life. Roller life also exceeds that of the slider cam buttons.