Is this a bad idea ???

Transmission, clutch, chains and belts
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54panman
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Is this a bad idea ???

#1

Post by 54panman » Mon May 12, 2008 10:14 pm

hey yall... saw a shovel this weekend that was running a throttle twist grip for his clutch.... custom cable i would assume! but is this safe or does it seem like a bad idea??? i have a few extra plastic assem. like this and was thinking about trying it.... other then the custom cable the only down fall i see it the the clucth has a lot of pressure and these cable housings are made of plastic!!! any input
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51Hog
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#2

Post by 51Hog » Mon May 12, 2008 11:25 pm

It is a matter of personal preference. I think there will be a learning curve on both installing and making it work properly, and learning to use it. The latter could be costly.

fourthgear
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#3

Post by fourthgear » Tue May 13, 2008 2:42 am

Wouldn't there be a lot of pressure on that small cable , even with a mouse trap. Now a diaphragm clutch , maybe not .

54panman
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#4

Post by 54panman » Tue May 13, 2008 3:03 am

that was kinda my thought!!!!!!!! it looked like the same set up i have... 5 finger, 3" open, mouse trap elim... i just thought it my be to much presurre for that little tiny slug on the cable end as well as the plastic assembly on the twist grip!

Cotten
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#5

Post by Cotten » Tue May 13, 2008 12:51 pm

Many years ago I considered a similar set-up for actuating a starter solenoid eliminator on one of my '65s.

The first thing that became apparent was that the mechanism had to operate when the grip was twisted forward, not backward. Twisting backward, or toward the rider, is the natural direction that the g-forces of operation encourage. That's why advance and throttle controls operate that way.
If your clutch operated by twisting toward you, it would be very hard to hang on without re-dis-engaging it.

So a stock advance control using 'music' wire would work for a clutch, if you reverse its direction with a later spiral.

....Cotten

Guest

#6

Post by Guest » Tue May 13, 2008 10:53 pm

cotten what do you mean by:::

"stock advance control" & " using 'music' wire would work for a clutch"

Cotten
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#7

Post by Cotten » Wed May 14, 2008 12:15 am

Guest!

By "stock", I mean original design.
"Music wire" also refers to the original design of wire control.
Beware of mild steel wire that easily kinks and bends.

....Cotten

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#8

Post by FlatHeadSix » Wed May 14, 2008 5:01 am

Cotten wrote:"Music wire" also refers to the original design of wire control.
Beware of mild steel wire that easily kinks and bends.

....Cotten
or stretches and breaks! another name for music wire is piano wire or guitar string, good stuff. You can tow a locomotive with it and it will flex forever before it work hardens and breaks.

mike

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#9

Post by FlatHeadSix » Wed May 14, 2008 5:13 am

and I would also have to agree with Cotten that an OEM spiral with a plunger and roller in a steel slot would have a much better chance of operating a clutch than the AMF era plastic sleeve twist grip.

jmho

mike

DuoGlide62
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#10

Post by DuoGlide62 » Wed May 14, 2008 2:44 pm

The idea sounds good but the plastic parts are woefully inferior for this idea. Russell Mitchel at Exile cycles has a kit for late model clutches but it'd take major re-engineering to work on a shovel.

http://www.exilecycles.com/index.php?section=37

TWIST CLUTCH KIT
We offer a Left Twistgrip Assembly that is identical to the Internal Throttle Assembly, but with a reversed spiral for use on the left side of the bars. This can be used to pull a cable for many custom applications, but we frequently use it to activate the clutch. Additional parts are necessary to reduce the effort required at the grip, so we developed our complete Twist Clutch Assembly.


This kit comprises the Left Twistgrip Assembly plus a cut-to-length cable, clutch activator arm pulley and a cable anchor.

DETAILED SPECS & PRICES

DuoGlide62
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#11

Post by DuoGlide62 » Wed May 14, 2008 2:53 pm

it'd take major re-engineering to work on a shovel.
(or a pan )

Panacea
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#12

Post by Panacea » Wed May 14, 2008 9:57 pm

54 panman, I guess I don't see any advantage in changing over to a twist grip, besides, picture what you would look like useing it as you go thru the gears......

kevsett
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#13

Post by kevsett » Fri May 16, 2008 9:13 pm

I don't see it as a mechanical or style advantage.

After watching the TV biker build shows where particpants and "builders" work so hard to make RUB bikes look cool I'll keep my stock Pan with foot clutch. It's cool without any effort. American Chopper does the "that looks cool, doesn't it?" thing way too much.

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