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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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  #11  
Old 8th January 2020
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Originally Posted by Kbetts View Post
A measurement at the clutch cable attachment point in addition to a measure at the handlebar lever might be useful. Lubrication of the cable will often make a large difference in friction/stiction felt at the handlebar.
I noticed my pull was lighter with the magnum clutch cable I use. Its a never lube cable. Lubing it will ruin it beyond repair.
When I went to the E1 with 15% spring I was expecting a harder pull but noticed no difference.
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  #12  
Old 8th January 2020
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Hope im notr hijacking thread,
But will a after mkt clutch such as Barnet be easy to pull??
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  #13  
Old 8th January 2020
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I dont know about easier but I doubt it will be harder unless you go with a stiff spring.
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  #14  
Old 9th January 2020
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Yes a Barnett clutch will be much lighter even though it is stronger. Can reccomend them
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  #15  
Old 9th January 2020
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Yes a Barnett clutch will be much lighter even though it is stronger. Can reccomend them
What Barnett clutch are you referring to ?
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  #16  
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Quote:
Originally Posted by 60Gunner View Post
I noticed my pull was lighter with the magnum clutch cable I use. Its a never lube cable. Lubing it will ruin it beyond repair.
When I went to the E1 with 15% spring I was expecting a harder pull but noticed no difference.
A clutch lever offers mechanical advantage. The distance the end of the lever travels in ratio to the distance the clutch arm travels is one ratio, the distance the clutch arm travels in relationship to the distance the clutch travels is another. The total force of the clutch spring is divided and then divided again.

Where you place your hand on the lever can have a significant effect on the force needed to move the spring.

The only additional forces are friction and stiction of the cable that can be added to the force required to overcome the spring at the handlebar.

I could have that all wrong as I didn't stay at a Holiday Inn Express last night in addition to some lingering fumes from bondo glass.

I wasn't aware of a no-lube cable being available but it would be interesting to measure the force of it vs the force required for a well maintained/lubed cable.

EDIT: Forgot to mention that I think the force is non-linear. Not sure though. I feels like a compound bow..... getting easier the further it travels. It may just be friction/stiction of the clutch plates . Any measurements might take travel distance into account.

Last edited by Kbetts; 9th January 2020 at 16:06.. Reason: add comment
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  #17  
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Barnett and Magnum cables are teflon lined and "can" be lubed
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  #18  
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Quote:
Originally Posted by rocketmangb View Post
Barnett and Magnum cables are teflon lined and "can" be lubed
I've heard of them being ruined and replaced because of lubing. Something about a reaction with the teflon. Maybe it's partly what they were lubed with. Idk. I'm not going to find out.
The throttle cables are different.

It was dryslide that ruined a few according to this.

https://www.hdforums.com/forum/touri...ch-cables.html

Last edited by 60Gunner; 9th January 2020 at 18:03..
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I don't know now as it was 2 years ago & I sold my bike in October. I had new pressure plate, spring, plates & cable. My bike was in for repair after a spill jammed it in gear & I had the clutch put in at the same time.
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