Join Date: Apr 2007
Location: Bangor, ME USA 04401
Vacuum assisted clutches are a really neat bit of technology, even though I have yet to have the chance to use one they still interest me greatly.
They work by using the engine vacuum created when the throttle is closed to separate the clutch plates, and reduce clutch pull.
Without a slipper or vac clutch you are required to manually disengage the clutch when you are decelerating quickly, (or turning, or going, or eating Mcdonald's) but as a benefit you have more control on the amount of slip you have. This can be both a good thing and a terrible thing. It's kind of like abs vs not, and if you think about it a slipper clutch is a lot like a traction control system. I like not having a slipper clutch because I use that greater control of braking force in the rear to substitute my lack of rear brake use.
I also ride a heavy bike and I have found that reserving some speed late into a corner then using the engine braking to shift the bikes weight as I lower the front into a corner and manually engaging the clutch to steady the suspension after the initial turn in, about 1/5th into the turn gives me a faster turn in and greater control. However this isn't on a track and not at race speeds, at faster speeds it is far too much to control accurately in a turn so I have to be slow on the entrance and faster out to bring the bike back up in the line that I want.
Either way I end up using the clutch to some degree until about 1/4 past the apex on most turns, and I like it.
I just really want a bike with a turbo, because their are those times when you pull up too a stop light next to a cop, and I think a really loud PPTTTSHIIISHHHHHHHH would make his day. =P