Change in RPM?

[vmax3]

I have a 78 Exciter that I am slowly building into a modified vintage drag sled. I have twin GPX pipes on and twin 36mm Carbs. I have not done any clutching yet.
The sled only turns up 7000 RPM, maybe a little more. Is there a way to increase the top RPM by clutching or compression??

The bottom end power increase and response is pretty awesome, but dies off fairly quickly.

Thanks

 

[snopro]

to increase your top end rpm, you need to run lighter clutch weights in your primary clutch.