Hi Steve, First thing that jumps out is, did you check to make sure the R65 output spline mates with your /7(?) driveshaft? Just checking.
As for shifting clutchless, it's a different game than with cars. Motorcycle transmissions have no synchronizers. They use dog clutches, basically large mating bosses and slots on the sides of the gears that can take huge amounts of abuse. They are also inherently more crunchy, clunky, notchy, whatever you want to call them. They work well on many bikes because there are at least five speeds, making less of a jump between ratios, the flywheel effect on most bikes is minimal, the gears are small to reduce impact forces, etc. Much of this doesn't apply to big twins like BMWs. My 4 speed /5 had a very "agricultural" feel to it. I've heard they got better with later models, but they're still big beefy drivetrains. I would guess that upshifts will be no problem, though you might think you're breaking something every time you shift until you get the hang of it. Downshifts could be iffy. If it was me I'd make a coupler that uses the spring cushion center part of the clutch disc. Otherwise when you downshift you will be instantaneously accelerating the motor to a higher speed. As I recall you're using a small motor, so you're going to want to use the trans during normal riding. You might want to make something quick to start riding, but don't design yourself out of the ability to shift on the fly. Chris On Thu, Mar 6, 2008 at 10:44 AM, SteveS <[EMAIL PROTECTED]> wrote: > I'm getting an R65 tranny which has 5 speeds. I'm still undecided about > a motor. I think I'm going to put the tranny in with my current motor. > That will let me try that motor with several gear ratios and actually be > able to run it at some different speeds and slopes. With that I ought to > be able to figure out what size motor it would take to run without the > tranny. I just don't want to spend $1000 or so on a motor that isn't > suited, so I'm going kinda slow and detailed.
