Coupling SERIES PRO HiT by Dr. Pulley for Vespa ET2/​ET4/​LX/​LXV/​S/​Primavera/​Sprint 50ccm 2T/​4T

The HiT coupling by Dr. Pulley from the SERIE PRO series rounds off the high-end range of clutches. The HiT clutch enables a high contact pressure not only through the centrifugal force, but mainly through the torque of the engine. It consists of two basic parts that can be twisted into one another: thanks to a sophisticated sliding or wedge system, the jaws are pressed against the inside of the bell by an extra force (in addition to the normal centrifugal force, as is the case with ordinary clutches). The stronger the engine (or the stronger the resistance against which the engine has to fight), the harder the sliding wedges press the clutch shoes against the friction surface of the clutch basket. The power loss in the clutch is reduced.

Other clutches start to slip at certain rpms or speeds, the HiT clutch does not. The everyday pilot benefits from more power on hills and when overtaking. The sporty driver will appreciate the increase in performance in the upper speed range.

3-shoe racing clutch, adjustable with 2 different spring kits for the shoes and the base plate, different spring strengths included, large pads. Up to 30% higher contact pressure, slip-free power transmission, less frictional heat, better acceleration. Adjustment tips and installation instructions included in the scope of delivery.

The adjustment is made using 2 spring systems. The first still controls the position of the starting speed at which the clutch should engage. The second springs, which are unique here, regulate the aggressiveness of the adhesion through the wedge system. For the high-end range, we recommend installing the two hardest spring types.

INFO: New clutch nut, clutch holding tools, quick cleaner, reinforced clutch basket.