GSF user 'vnb1T': ?Works great! Very easy to assemble. The clutch separates cleanly straight away, with no messing about : 3.00 RMS with a SIP primary repair kit and an original PIAGGIO outer basket, XL 2 4-plate clutch.
Annoying motor damage due to broken rear springs or worn out primary kits is now a thing of the past. The new SIP Primary Repair Kit is a must for every small frame over 10 hp and should be part of every motor renovation. The cover is CNC milled, gas nitrified and has a threaded spacer. Clutch sided rear shocks are held in check with a lasered cover made of highly durable CK 75. 4 top quality hexagonal screws, scaled 10.9, guarantee screw safety.
The SIP Primary Repair Kit uses screws as opposed to being simply riveted like the original, making installation a breeze.
Info: after installation, check play of primary/repair kit to casing, primary bearing placement, to clutch basket and pressure plate. Use LOCTITE for absolute screw security.
Conclusion: Best price/performance ratio. Say goodbye to ruined gears due to primary spring damage.
SIP-TIP: don't forget primary bearing, woodruff key and clutch nut.