Clutches?

if i wanted a lightweight clutch kit would I be going mad?

wondering how much of a weight savings there would be and which clutch kit would be best for mostly street use?

I know that the stock one is perfectly fine, and I don't need to replace mine any time soon. I'm just curious because I like to know these things.

I see a STM Evoluzione Alloy clutch group here that replaces the 6 OEM helicoil springs for a 90mm Evoluzione diaphragm spring....what are the specific benefits to doing this? Any negatives?

Also, what's the difference between the 12 tooth and a 48 tooth? One for the sbks and one for the rest of em? Any info would be appreciated!

Also, on the slave cylinders....I see an option here for a 28mm and a 30mm, what's the difference and what bike gets which size?

Just installed a yoyodyne lightweight kit on the s4, you definitely wouldn't be mad if you got one. Very nice. Cost about $600 for the kit and $150 for the aluminum plates. I highly recommend it or really any other lightweight clutch kit. Both the basket and hub are much, much lighter then stock. Another plus for the yoyo kit is that the springs and columns barely stick out from the pressure plate.


click for bigger pic