How to Diagnose Clutch Slipping

[ggRAT]

Is my clutch slipping at high RPMs or could it be something else?
Here's a graph from my Veypor VR2 of two runs overlaid. Notice the eratic RPM curve at high RPMs.

You can rule out the modified igniter, because I got similar results with a Procom igniter.

Thanks,
GREG

 

[buckstoy]

If I'm reading the graph right, i dont think your slipping, I would think your RPM's would increase sharply but it looks like your dipping down.

 

[mikenva]

If the clutch slips on these bikes it will do it at arund 5000rpm in 5th gear when you roll on it.RPMS will go up then fall back down.When i first did my motor I had barrnet clutch with there green springs it would slip like that in high gear roll on.I had to go to the red springs to cure it .

 

[bdavanza]

You will know the clutch is slipping because rpms will spike without corresponding acceleration.