Modern Vespa

Hello all, I am planning to buy a new clutch, but undecided on what to pick. I have two choices and want your opinion on them. This is going on a 1985 px150e. That will get 177 kit, exhaust, carb and crank at rebuild time.

1. Newfren sport - four plates cork, 21 tooth 108mm this fits without modifying the clutch cover and case.

2. Sip cosa 2 sport tour plates, 21 tooth, 8 springs 115mm so I need to modify.
Also could someone provide a picture of the area on the case that needs to be removed to run the bigger clutch. I know the covers oil channels need grinding down, and besides the pressure plate what else is needed to go with the 115mm? Thanks in advance

Are you sure you want to stick with a 21t clutch? My stock PX150 with a SIP Road pipe is begging for a taller gear. I bought one of the DRT 23t clutch gears to throw in it. It revs out 1st with the stock gear way to quick.

I get nervous with the clutch setups that use an extra friction plate. Gotta make room for it somewhere. That means the steel plates are thinner and the tabs on the friction disks are thinner as well. ie, more likely to dig into the hub and basket.

I wasted days farting around with an aftermarket Cosa clutch in my P200. It never worked right, always dragged etc. Not sure why it's still in my parts box. I wouldn't wish it on my enemies.

Chuck

How many teeth do you have on your primary drive?

21 is quite low on your setup i assumed.

Try BGM Superstrong. I'm using it without any problem so far.

http://www.scooter-center.com/en/product/BGM8099/Clutch+BGM+Superstrong+CNC+Typ+Cosa2FL+for+primary+drive+wheel+6465+Vespa+PX200+Rally200+23+teeth+for+6465+teeth?meta=

Genuine Cosa clutch from a late PX or a 7 spring from a P200. The number of teeth depends on your choice of 177 kit and your primary drive. I use DRT 23T with a 68T primary with a BGM 177 kit, but it really needs a 65T primary with either 23T or 24T clutch to reach top speed.

I bought the malossi 23/64 kit at sip. I bought a ring to weld to my basket, and some Newfren carbon/resin plates instead of cork. Gonna start there and see how it works.