Higher RPM clutch springs without upgraded contra spring?

[benhonda]

I recently tried putting a 2000 rpm spring kit on a 50cc bike

I got the springs on without much issue but then couldn't get the belt on the rear pulley and installed on the bike.

I took it apart and put it back together a couple of times to make sure I had it right, and noticed that the

upgraded contra spring was tight on the base, I think this was making it harder to open the pulley and get the belt on.

So I have tried running just the clutch springs and used the stock contra spring.

But I don't fully understand what the contra spring does or why you would need to change it along with the

clutch springs.

is there any adverse effect to running higher rpm clutch springs with the stock contra spring?

[lupo76]

You dont need to change a contra spring along with clutch springs.

Contra spring will be upgraded, if the belt is slipping while accelerating.

Clutch springs are upgraded, to let the clutch engage at higher rpm. Also you have to adjust your roller wheights then.

[jeff84]

only adverse effect I can see is its possible that your cvt may begin to "shift" before your clutch engages making your engine work harder to get going.  think starting in 2nd or 3rd gear instead of first.   you will hear the engine rev high then bog down momentarily when starting from a stop and your acceleration will suffer until the bog is overcome.

wont hurt anything though