Built the engine on my 2013 Slim this past winter and it rocks, the bike dynoed at 116/116 SAE. Stock clutch with Barnett heavy spring, there was a bit of slippage evident on the chart and I can feel a bit when I nail the throttle at times.
Gathering parts to change to a 30 tooth front pulley and figured it would be a good time to upgrade the clutch. Looking at just using the Barnett Kevlar kit. Any thoughts or recommendations appreciated.
Thanks

 

Bandit machine and be done with it.

 

Seems odd that you were/are getting slippage at those numbers. I am using a stock clutch pack with an AIM 340lb spring and a vpc92 and I have no issues at higher numbers than that with a heavier bike. Be somewhat wary of bandit sportsman clutch on the newer bikes as bandit recommends only 14oz of primary fluid and that will definitely hurt the compensator over time. I like my aim-vpc over the stock pack and 340 spring, its rated for 150tq and pulls super easy.

 

X2 on the VPC - I run that with a Barnett extra plate clutch & it locks up hard at about 1800 rpm & does not slip. I have enough motor to fishtail at 75 in 5th gear on a 5 speed. -Eastcoast Jim

 

After speaking to a few people locally the problem may be the fluid. I let the parts guy at the dealer talk me into SYN3 when I bought my gasket and fluid. Going to clean all that slippery stuff off when I put things back together and go back to formula+. Maybe that will solve it.

 

Or Bel Ray v-twin primary fluid. I like it a bit better, its a bit thinner and and seems to let the plates/discs grab a bit better and still keep the comp happy. Don't overfill.

 

Might try the Bel Ray, a buddy runs it and gave it good word too. Still fill to stock level....bottom edge of diaphragm spring?

 

On my bike it states 38 oz for a drain and refill will bring it up to the bottom of the clutch basket/ spring. It does. Bel Ray comes in a Liter bottle, 33.8 ounces. I just put the bottle in and call it good. Fill to almost the spring, maybe just before it touches the basket. A touch less is better than a touch too much.