Variable Pressure Clutch
Tourer
Joined: May 2009
Posts: 383
Likes: 20
From: Great Britain
Fitted my VPC from AIM over the weekend (no instructions included...)
I opted for the VP84 as my engine only has a stage 1 but slips occasionally when going through 4th/5th. I have a trapped nerve in my hand so clutch pull needs to be a bit easier as well.
Anyway,
I had a little issue when fitting it. You are supposed to be able to fit it through the derby cover and you can IF you put the bottom LH bolt in first and tighten it up. This pulls the whole unit inwards allowing it to "swing" round and then the other 5x holes line up. Its easy once you sort that part out.
Went out for a trial run;
Much less clutch lever pressure needed in all gears up to about 4k revs - above that it gets a little harder but not much - feels very positive and neutral easier to find.
No clutch slip at all - i did not adjust the clutch this time as i wanted to see a direct comparison with just adding the VPC.
Rowle - UK
I opted for the VP84 as my engine only has a stage 1 but slips occasionally when going through 4th/5th. I have a trapped nerve in my hand so clutch pull needs to be a bit easier as well.
Anyway,
I had a little issue when fitting it. You are supposed to be able to fit it through the derby cover and you can IF you put the bottom LH bolt in first and tighten it up. This pulls the whole unit inwards allowing it to "swing" round and then the other 5x holes line up. Its easy once you sort that part out.
Went out for a trial run;
Much less clutch lever pressure needed in all gears up to about 4k revs - above that it gets a little harder but not much - feels very positive and neutral easier to find.
No clutch slip at all - i did not adjust the clutch this time as i wanted to see a direct comparison with just adding the VPC.
Rowle - UK
Road Warrior
Joined: Aug 2006
Posts: 1,575
Likes: 7
From: Wisconsin
Just ordered a VP95LT for my Road Glide. It should be the upgrade I need to support the 107 upgrade happening in April.
It should have no effect on the lever pull force required but give me all the clamping force I need for the 107 upgrade.
It should have no effect on the lever pull force required but give me all the clamping force I need for the 107 upgrade.
Tourer
Joined: May 2009
Posts: 383
Likes: 20
From: Great Britain
New bolts are cap heads - much better than the dome heads that are standard.
I did mine inc oil change in 15 mins.
See my earlier post for a tip on fitting it.
Great modification i think.
Rowle uk
I did mine inc oil change in 15 mins.
See my earlier post for a tip on fitting it.
Great modification i think.
Rowle uk
Road Master
Joined: Jul 2007
Posts: 759
Likes: 7
From: Western KY
Thanks guys, the reason I was asking was when my VPC arrived there wasn't any bolts.
I contacted the seller and received them in short order. Easy enough install, but have not tried it yet due to the snow.
I contacted the seller and received them in short order. Easy enough install, but have not tried it yet due to the snow.
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Tourer
Joined: May 2015
Posts: 293
Likes: 15
From: Vacaville
In reading all this thread, i see a few mentions that to much pressure can break things? Can some one elaborate? What gets broken? Sounds like I am going to need a vpc soon s mine is slipping, and all I have done is the air cleaner, slip ons and a light flash. But have cams in hand and planning on port and polish with larger valves, in the future. If it's slipping now it most certainly will slip with more power added, so I was thinking more pressure = better.
Road Master
Joined: Jul 2010
Posts: 1,042
Likes: 86
From: Centeral Coast, California
In reading all this thread, i see a few mentions that to much pressure can break things? Can some one elaborate? What gets broken? Sounds like I am going to need a vpc soon s mine is slipping, and all I have done is the air cleaner, slip ons and a light flash. But have cams in hand and planning on port and polish with larger valves, in the future. If it's slipping now it most certainly will slip with more power added, so I was thinking more pressure = better.
1. Broken clutch cable in about 3 months
2. Entire clutch lever assembly severely worn, and some pieces broken in about three months; had to replace all of it
None of it was terribly expensive, but it was a terrible PITA. A heavy duty clutch spring is a solution to clutch slip, but it's not the best solution, not without a VPC to go with it, in any case. And I don't think that for most builds both are needed. Some maybe, but not for most.
Last edited by gipper; Feb 18, 2016 at 11:24 AM.