103" and clutches

[Flat Dog]

Has anyone else noticed that the power xfer on a 103" is not what it really should be...that the snap is just not there? I know going to the SE spring on my setup would help a little, but it seems like the stock clutch on the Ultra is just soft. Anyone else have this experience, or am I losing the rest of my 4 marbles?

[tireater]

I have VPC's on both my bikes...Easy pull and no slip...With energy one discs...No slip here ! ...

[mtnmotorrider]

John:  I put a SE clutch spring and Energy One 10 disk kevlar friction/steel set in my 103 and it holds great.  No slippage showing on the dyno at 107 FPT.  Clutch handle pull is just a little bit more than stock, but no problem at all.  Toyal price:  about $150.

[Flat Dog]

Does this get you that tire chirp/burnout on demand kind of power transfer?

[Tattoo]

The VPC works real nice.

[Flat Dog]

Yep-had one on my Heritage..got it from AIM.

[HV]

I installed them on all the Jims 120s I built... VPC is unbeatable !

Got all mine from our own HIPPO ... 

[Faast Ed]

I kept the VPC from my last bike and installed it on my 08 before putting more than five miles on it.

Never noticed anything soft about it when stock, nor after building the motor.
(Oops! have the pre 03 spring in there too). Was a Hippo recommended combo.
Solid bite with the ultralite pull. I'll never run anything else.

[StreetKing]

Could someone please explain the VPC set up.  Thanks

[rigidthumper]

www.aim-tamachi.com

[Flat Dog]

StreetKing-more or less the principle is the higher the revs, the higher the torque transfer. 2500+ RPM and your torque transfer climbs.

[mtnmotorrider]

I don't do burnouts, but I have lifted the front tire with this set up, and I'm sure it would smoke the tire too.  I try to take it easy on the stock crank set and nor sissor the pin.

[Arrowsmit]

SE spring, E-1 extra plate kit, & VPC...it'll hold!

VicW.

[09fltr]

What does vpc stand for?

[StreetKing]

VPC stands for Variable Pressure Clutch. Go up a few threads and use the web address rigidthumper gave. Looks like a plan.

[rigidthumper]

I've used 'em for anything from stockers looking for easier lever pull ( I know,???, but it's the customers $) to 140HP+ big motors and they work well every time. I have an 03 spring and VP92T on my "08. Works great!
Robin

[simondyna]

I run a Rivera Engineering/Primo Pro-Clutch in my 124".

Cant speak highly enough of it. It works.

[tdrglide]

SE spring, E-1 extra plate kit, & VPC...it'll hold!

VicW.

Thats what I run