Replace clutch plates and spring??
Thread Starter
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Cruiser
Joined: Sep 2011
Posts: 101
Likes: 9
From: Truckee
Replace clutch plates and spring??
Rebuilt my 1990 FXRS with 10.5 pistons & .0040 over, S&S 520 cam, and had heads ported/polished with valve job. Plan on using existing Python I staggered exhaust with Mikuni 42MM. (may upgrade exhaust and go with bigger Mikuni down the road).
I'm putting together primary now and took apart clutch pack for inspection. All parts look great. Metal plates show no sign of blueing; with no warpage. Friction plates exceed factory specs of .661, with no scarring, and have appear to have plenty of meat left. Stock spring appears to show no signs of wear.
I'm inclined to put the stock pieces back together and run it 'as is.'
Given my upgraded engine, does anyone have opinions if this is a bad idea?
Or is it best be prudent and replace all with a 15%+ spring?
I'm putting together primary now and took apart clutch pack for inspection. All parts look great. Metal plates show no sign of blueing; with no warpage. Friction plates exceed factory specs of .661, with no scarring, and have appear to have plenty of meat left. Stock spring appears to show no signs of wear.
I'm inclined to put the stock pieces back together and run it 'as is.'
Given my upgraded engine, does anyone have opinions if this is a bad idea?
Or is it best be prudent and replace all with a 15%+ spring?
Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
At 30k mi my clutch was giving me problems shifting, spring plate ate up the clutch hub. Hub cost about 3 bills. Extra plate shifted better and hooked up much better. No brainer to drop in the extra plate.
Thread Starter
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Cruiser
Joined: Sep 2011
Posts: 101
Likes: 9
From: Truckee
Ok, given the condition of existing steel/friction plates, can I just buy two more steel plates and one more friction plate? Or do I need to buy a whole kit, to replace all steel/friction plates?
Seasoned HDF Member
Joined: Aug 2008
Posts: 5,080
Likes: 2,155
From: Ohio
Ya, it happened to me, those rivots will come apart and can barely get it to go in gear.
Had good luck with a Energy One clutch kit behind 100 hp, Barnett and several others make a good clutch kit
https://www.energyoneclutches.com/home.php?cat=15
Had good luck with a Energy One clutch kit behind 100 hp, Barnett and several others make a good clutch kit
https://www.energyoneclutches.com/home.php?cat=15
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Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
I ran my Glide with a S&S 107" engine and stock plates for quite a while, just used a stronger spring. I have since swapped to a set of +1 kevlar plates from Barnett.
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Stellar HDF Member
Joined: Sep 2011
Posts: 3,125
Likes: 1,754
From: In The Woods, PA
I used the HD kit that eliminates the spring plate, its the same one used in police models and 110 inch bikes. Tough clutch pull and reduced friction zone though. I may try one of the Barnett clutch cables.