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Sportster Motorcycle Transmission, Clutch, Primary & Secondary Drive Transmission, Clutch and primary or secondary drive problems, advice, and/or how tos.

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View Poll Results: Stock Spring plate, has it gone bad on you
Solid Mount- (2003 and earlier) Still Good (below 50k) 56 20.22%
Rubber Mount (2004+)- Still Good (below 50k) 94 33.94%
YES -Solid Mount 10,000-20,000 5 1.81%
YES -Solid Mount 20,000-30,000 3 1.08%
YES -Solid Mount 30,000-40,000 5 1.81%
YES -Solid Mount 40,000-50,000 3 1.08%
YES -Solid Mount 50,000 + 3 1.08%
YES -Rubber Mount 10,000-20,000 25 9.03%
YES -Rubber Mount 20,000-30,000 29 10.47%
YES -Rubber Mount 30,000-40,000 11 3.97%
YES -Rubber Mount 40,000-50,000 4 1.44%
YES -Rubber Mount 50,000+ 5 1.81%
No Solid Mount 50,000+ 19 6.86%
No Rubber Mount 50,000+ 15 5.42%
Voters: 277. You may not vote on this poll

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  #301  
Old 15th April 2019
Nibelungen's Avatar
Nibelungen Nibelungen is offline
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Quote:
Originally Posted by rejeanprimeau View Post
Looking at the teeth of the kit in the lower picture, the friction disks are the old style type.
sharp eye...
congrats

i already had done some intel work about that... and had found the same...
then i have forgotten...

by the way it seems that the 37980-19 kit... is suitable only if you upgrade also to the SE twin cam performamce race clutch hub kit PN 37976-08
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Last edited by Nibelungen; 23rd April 2019 at 18:13..
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  #302  
Old 18th April 2019
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r4fthrs r4fthrs is offline
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Quote:
Originally Posted by Nibelungen View Post
the slight squeal is not a cons or a fault in the design...is the price for not having anymore a spring plate...or even a judder spring...that is a clutch for racing... with kevlar inserts...if anything her cons could be a bit less adjustability...but i can live with that (actually i live over 5k revs)...
I replaced my clutch with the Barnett kit with extra plates and used my stock clutch spring and I have never experienced a squeal. Has been about 5 years now and clutch works great. Smooth, positive release and no slippage. I wonder why some experience that issue and others don't?
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  #303  
Old 18th April 2019
Tomcatt Tomcatt is offline
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I went thru this. I have a NOS 2017 XL1200C. As delivered the clutch drug BADLY. With the bike in gear and the clutch pulled in (engine off) it was a major effort to push the bike. Neutral was next to impossble to find. I dumped the primary / transmission oil and filled with Redline 75w90NS and it got a little better. I opened the primary and replaced the grenade plate with 2 OE steels and an OE friction. Put in a 7200B release brg too. Filled it with Redline D6 ATF.
Now the clutch screeched occaisionally. As I've put some miles on it the screech has gone away and the clutch drag has decreased to normal.
No more screech, no more clutch drag, good clutch apply, Redline D6 in the primary / transmission.
Go figure.

Edit: Screech came back. Final solution was to add Red Line Limited-Slip Friction Modifier. That did fix it.
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Last edited by Tomcatt; 1st June 2019 at 02:40.. Reason: more
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  #304  
Old 26th April 2019
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Quote:
Originally Posted by r4fthrs View Post
I replaced my clutch with the Barnett kit with extra plates and used my stock clutch spring and I have never experienced a squeal. Has been about 5 years now and clutch works great. Smooth, positive release and no slippage. I wonder why some experience that issue and others don't?
well for starters both my bikes are not barnetts or any aftermarket solution, its just the stock clutch with the spring plate removed and replaced with 2 (again stock parts, from a donor bike of a friend that 1340'd its engine and put an alto carbonite clutch) steel separators and 1 friction. both squeal (one is an old 883R and other is a newer 1200CX) but only on spirited take-offs and gear shifts

I suppose this setup is the worst offender on the squealing department.

by the way 1 donor clutch = 3 spring plateless bikes and you end up with some extra frictions just in case
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  #305  
Old 31st May 2019
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My 2004 Sporty has 34k on it. I got an Energy One clutch from
Hammer Performance and intend on installing it this weekend.
Been having trouble finding neutral so wouldn’t be surprised
if it’s not looking so good in there. Will update my post after it’s in.
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