A bit of clutch slippage at 3000rpm
Just got the bike back today. Had some Woods TW-777 cams installed, decked heads .030, cleanup of port, and an evolution industries 30T compensator sprocket. Ended up with 95hp and 105tq. Pulls very hard once you get up to 3000rpm. Also, the increase in rpm from the sprocket makes it a bit smoother cruising at 60-70. In 6th at 60 the bike pulls to 80 faster than it used to in 4th.

 

Did it feel like it was missing any power between 2000 ?and 3000 rpm

 

Not Really, the compensator sprocket lets you get away with a little less bottom end tq

 

Big O what are your RPMS at 80 mph

 

I'm gonna make an educated guess from the provided info from the manufacturer of the sprocket.

3250RPM / 70MPH * 80MPH =~ 3715RPM

Here's the specs from Evolution Industries, should give you somewhat of an idea. (my bike doesn't have a tach unfortunately)

Raises RPM to achieve maximum performance eliminating lugging of motor.
Changes stock 1.352 gear ratio to 1.5333 gear ratio.
- 4th gear 70 MPH @ 3620 RPM to New 4th gear 70 MPH @ 4500 RPMs.
- 5th gear 70 MPH @ 3042 RPM to New 5th gear 70 MPH @ about 3750 RPMs.
- 6th gear 70 MPH @ 2570 RPM to New 6th gear 70 MPH @ about 3250 RPMs.

 

Thanks

 

Nice increase over stock.
Now a 107" set at 10.4 cr, and headworK.......
Scott

 

Thanks,

Bike now has a 107", Headwork, 50mm ported throttle body, 999-6 cam, set at 11.3cr.

Numbers are 116hp and 121tq.

Was hoping for more with that high of a compression ratio...

 

Was this a 107 FM kit? Also what pipe and what gear was the dyno pull in?

 

No my stock cylinders were bored and headwork was done by my builder's guy. (I think its called Dirt Track Designs)

Pipe is a D&D Fatcat and I'm not sure what gear the pull was done in.

I wasn't sure if the 30T Comp Sprocket had an effect or not...