View Poll Results: What clutch spring are you running?
Voters: 34. You may not vote on this poll
clutch spring
Thread Starter
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Outstanding HDF Member
Joined: Aug 2011
Posts: 2,325
Likes: 7
From: SE Illinois
clutch spring
Just curious about who's running the stock cluth spring & who's changed theirs out for the SE clutch spring or something else.
My tuner recommended keeping the stock spring with the numbers my bike is making (86hp/96tq) & said the SE spring wasn't necessary until you get to 95+hp or 105+ tq or so.
At what point or what numbers do you benefit from changing to the SE clutch spring or another clutch spring?
Please post what clutch spring you're running and your bike's numbers for reference. Wondering & thinking this might be something I'll do in the future.
Thanks in advance for any input or thoughts on this.
My tuner recommended keeping the stock spring with the numbers my bike is making (86hp/96tq) & said the SE spring wasn't necessary until you get to 95+hp or 105+ tq or so.
At what point or what numbers do you benefit from changing to the SE clutch spring or another clutch spring?
Please post what clutch spring you're running and your bike's numbers for reference. Wondering & thinking this might be something I'll do in the future.
Thanks in advance for any input or thoughts on this.
Extreme HDF Member
Joined: Sep 2006
Posts: 10,114
Likes: 29
From: Vancouver B.C. Canada
I have SE spring, it grabs instantly compare to stock clutch spring. I didn't realize how bad the stock clutch slipped until I installed the SE spring. However, It is 30% harder to disengage, you got to install a ez clutch to compensate. I have the cheap Burly ez clutch lever installed, cost $34 on top of the SE clutch. Trust me, the SE clutch and 30T pulley are the best investments I've had.
Tourer
Joined: Nov 2011
Posts: 421
Likes: 4
From: Alabama
Barnett HeavyDuty spring here. My ride's an '04 Dyna with stock tc88. Swapped the worn-out OEM clutch for an Energy One replacement, and it slipped like crazy in 5th with the original spring (never slipped with OEM spring/clutch). So invested $34 in a Barnett HD spring rather than $150 in a second new clutch. Seems to have worked, no more slipping, but now I have to spend an hour each evening doing lt forearm exercises. 
Not exactly the way I had it planned.
Not exactly the way I had it planned.
i have the barnett Heavy duty clutch spring in now. i dunno why everyoen seems to think you need to be popeye to use it though. i dont notice any heavier pull with it over stock still only need to use 2 fingers for full engagement/disengagment. loving it though as theres no slipping anymore
Advanced
Joined: Dec 2008
Posts: 80
Likes: 0
Been doing the same research. Just ordered #37871-98 (newer #37871-98A) suppose to be a happy medium between stock and the SE.
Here's what I found:
37951-98 Nothing
37871-98A Yellow dot
37807-03 CVO Yellow dot / Pink dot
37871-04 Yellow dot / Yellow Stripe
37882-06 Redish Brown Square / Yellow dot
SE 380 lbs
98 330 lbs
04 300 lbs
06 300 lbs
Year Models P/N
99 99 - * ALL 37871-98
01 01 - * ALL 37871-98A
03 ALL 37871-98A
04 ALL 37871-04
06 37882-06
Here's what I found:
37951-98 Nothing
37871-98A Yellow dot
37807-03 CVO Yellow dot / Pink dot
37871-04 Yellow dot / Yellow Stripe
37882-06 Redish Brown Square / Yellow dot
SE 380 lbs
98 330 lbs
04 300 lbs
06 300 lbs
Year Models P/N
99 99 - * ALL 37871-98
01 01 - * ALL 37871-98A
03 ALL 37871-98A
04 ALL 37871-04
06 37882-06
Last edited by BlueBobber07; Mar 26, 2013 at 05:57 PM.
Road Master
Joined: Aug 2012
Posts: 854
Likes: 20
From: CT
Agree. Just do it, you will be much happier. Loved my se spring, made the stock clutch hold up to 100ft lbs and serious abuse for 40k and was still mint. Unfortunately it won't hold up to the new combo. I don't think its hard to pull at all, I two finger it all the time. It gives the clutch a lot more feel and snap rather than the stock mush.
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Road Warrior
Joined: May 2012
Posts: 1,570
Likes: 117
From: Southeast NC
been doin it in mx bikes forever. its the first think i do before i ride or race it. The factory puts a weak spring in at the factory because when u sit on the bike on the showroom floor they want u to pull in an easy and buttery smooth clutch lever. its a selling point and thats it. But you most definitively are not putting every ounce of power to the ground. I will put a h.d. spring in my fat bob this summer. i could feel it slipping from day 1.
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