Tags: Puch Clutch, HK Racing
Reviewer: Sune A.
If you're looking for a clutch for more torque than you might consider the HK Racing Clutch. They're not cheap but it's said to be the best clutch for racer, terrain or road rides. But are they plug and play and does it really deliver what's said? Sune tested it out for us.
When the day arrived that Sune received his package from Puchshop.de, it was a real pleasure to open it and see that clutch was made in excellent quality with proper finishing. Setting the RPM is incredibly easy thanks to a very clear and understandable manual. Sune first setted the clutch to maximum RPM and putted the clutch in oil for about 24hours.
| Adjustment per weight | Engagement RPM | Difference RPM |
|---|---|---|
| Adjustment without extra weight | 7500 | 0 |
| Bolt 1 Added | 7200 | -300 |
| Bolt 2 Added | 6900 | -600 |
| Bolt 1 & 2 Added | 6800 | -700 |
| Plate 0.8mm & Bolt 1 Added | 6500 | -1000 |
| Plate 1mm & Bolt 1 Added | 6300 | -1200 |
| Plate 1.5mm & Bolt 1 Added | 6100 | -1400 |
| Plate 0.8mm & Bolt 2 Added | 6200 | -1300 |
| Plate 2mm & Bolt 2 Added | 6000 | -1500 |
| Plate 1.5mm & Bolt 2 Added | 5800 | -1700 |
| Plate 1.5mm & Bolt 1 & 2 Added | 5600 | -1900 |
After putting the clutch in oil for 24hours, it was time for the first test run and the first run was insane. It took RMP before it grabbed the clutch bowl which was a complete different experience.
The torque it had was insane. But the adjustment was not ok yet. Sune could feel that it got too high in RPM so the clutch was further adjusted down in RPM. Probably because of the high RPM the iron in the oil clutch jerked loose and pushed the locking ring off. Sune then adjusted the HK Racing Clutch to 5600RPM and fitted the clutch bowl with new shims and a new locking ring (with Loctite locking glue). Now it was time for test run number 2.
The third test run was again a completely different experience. His Maxi now ran amazing and went really fast from 0-100 km/h. It does needs some adjustment, but once you get it right it’s an absolute ugrande. Sune recommends to switch to the HK Racing Clutch because the insane torque and the sweet engine sound. His score for HK Racing Clutch is 10/10.
Sune's gives the HK Racing Clutch: 10/10
Gilardoni 47mm.
Manifold: stage6 high flow stage6 spacer 10mm.
Reed valve: stage6 vforce 3 Carburetor: 24mm stage6 black
edition pwk.
Exhaust: simonini
Ignition: mvt innerrotor 12v
Clutch: hk race 5600rpm
Gear: 15/36
Last time he measured, it had a topspeed of 116 km/h. But this was before installing the MVT Inner Rotor and HK Racing Clutch. He will let a professional company measure the topspeed later.
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