My HIT clutch for my MP3 500 was sent today. Documents were went to me with the notification.

According to Paul, the "HiT251701 can fit any Piaggio group's 400/500 CVT scooter or ATV." One of the documents was the following:

Test steps of HiT clutch and Sliding Roller Weight
The pillow spring/clutch spring installed in the HiT & its clutch-in rpm is showes as in the Clutch-in data Table as enclosed.
To compare the performance of SR & HiT clutch with the STOCK ONE ,it's better to test the parts as following steps:

1. SR vs stock round roller-------under the STOCK CLUTCH ,replacing the stock
roller with the SR , comparing different weight of each SR you have to see which one is better to the vehicle.

2. HiT clutch vs stock clutch------choosing one SR & installing the HiT clutch as it comes out the package ( ie, no need to change the springs ) to see how is the
performance.

a) HiT clutch is ok --- means the vehicle is smooth and powerful at taking-off and the capability of overtaking & hillclimbing is excellent.

b) vibration at take-off but the re-acceleration is powerful--- means the clutch
engagement is too strong or the vehicle is too weak to drive the
solid engaged HiT clutch/clutch outer from the standstill. Please
replace the clutch spring with harder one or replace the pillow
spring with the harder one or replace both spring with harder one.

c) no vibration at take-off and re-acceleration is poor too--- means the v-belt might be slip (ie.the clamp force of V-belt is too weak, you'll find the surface temp. of variator is much higher than that of clutch outer. ) It's better to use heavier SRand torque spring washer to clamp the v-belt tighter.

d) if you want to try different pillow spring or clutch spring to see different
performance at different combinations of Pillow/ Clutch springs. Please see the
HiT instruction enclosed in the package. And always choosing the clutch spring
first for the correct engaged rpm and then select the pillow springs.
If you have any problem about the parts,please contact us via
e-mail: unionltd@ms14.hinet.net.

IF ANYONE DESIRES THE OTHER DOCUMENTS send me a personal message with your email and I will send them. There is one Word and another Acrobat.