Yes, playing with the clutch will help in improving the bike's
acceleration. But do remember that the clutch plate will wear out
faster becos of the friction 
In SPs, the power will kick in at higher RPM. I guess the same also
goes for other 2 strokers (TZM, KRR), although they might have
broader power range. Try to shift gear at around 7000-8000 RPM. You
should get enuff acceleration, and no longer need to play with the
clutch.
My problem is a bit different, it's the 1st gear that's troubling
me. It feels quite heavy when the bike starts to move, for example
after a traffic light. Takes a while to increase the RPM from 1500
to 3500, then it will accelerate normally. Anybody has the same
experience?
Yes. 1st I thought it's only my bike. But since you have the
same prob, I guess it's common in SPs.
Just to add on, front brake will always be more powerful than rear
brake. It has larger disc (double front discs for big bikes), and
sometimes more powerful calipers. But bear in mind that your leg is
much more powerful than your hand. So the power implied to the
brakes should equal each other. But somehow the rear brake in SP
feels just like a drum brake 
Try to drop the gear at around 5000-6000 RPM, and release the
clutch immediately. The RPM will shoot up, and you'll feel
something is holding back the bike. That's engine brake. It's
useful when you have lousy brakes, or when you're riding fast and
need to de-accelerate quickly.
Gear ratio also plays a part. Dropping from 6 to 5 at 6000 RPM
won't give you significant engine brake, but try to drop from 3 to
2 at 6000, and your bike will jerk
Based on my experience, just closing the throttle won't give you
enuff engine brake if you're riding a 2-stroker. You still have to
drop the gear. For a 4-stroker, closing the throttle will give you
some engine brake, and some more when you drop the gear.
[This message has been edited by SnailRider (edited 11 February
2002).]
