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Old 11-23-2012, 12:42 AM
ddowns46 ddowns46 is offline
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Default Custom manual clutch

Hi all, been browsing around for a quite a while. I grew up riding mini bikes, go karts, and gas scooters. I always thought it would be cool to have a manual clutch as opposed to a centrifugal clutch or torque converter. So i designed and prototyped one

This clutch will bolt on to any horizontal shaft engine with a 3/4" shaft. The clutch will be disengaged via the lever arm shown in the pics above. This lever will be either actuated by foot pedal or handlebar lever.

I still haven't done any testing yet because I still need to have the clutch liner installed, but I am fairly confident that the clutch will perform well (given it's the first prototype!).

I think having a manual clutch on a go kart would be advantageous for the following reasons:

1. positive clutch engagement. It will only slip when the driver wants it to slip.
2. decompression braking
3. ability to bump start.
4. burnouts! and wheelies for the minibikers
5. gives kids a chance to learn how to use a clutch before graduating to dirtbikes and cars with manual transmissions.
6. changing engagement speed does not require a special tool and expensive centrifugal clutch.
7. clutch feathering to get up steep hills.
8. potential advantages in go kart and mini bike racing


Let me know what you think! I will be sure to post videos when I've got it up and running.
Attached Thumbnails
minibikeclutch1.jpg   minibikeclutch3.jpg  


Last edited by landuse; 11-23-2012 at 02:57 AM.
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  #2  
Old 11-23-2012, 12:46 AM
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That thing is really neat. A very clean prototype.

I think we would all love some more information on how it works. A video would be great too!

P.S. You should probably get a patent out on that thing. Wouldn't want anyone stealing your idea. (And i would hope no one here wants to).

Oh - to the forum! Glad you finally () decided to join.
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Old 11-23-2012, 12:47 AM
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Dude this is pretty cool! Defiantly wanna see it working.
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Old 11-23-2012, 12:48 AM
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Quote:
Originally Posted by souperman000 View Post
That thing is really neat. A very clean prototype.

I think we would all love some more information on how it works. A video would be great too!

P.S. You should probably get a patent out on that thing. Wouldn't want anyone steling your idea. (And i would hope no one here wants to).

Oh - to the forum! Glad you finally () decided to join.
thats why you don't go to in depth about the inner workings.

Even though i already figured it out. haha
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Old 11-23-2012, 12:50 AM
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thats why you don't go to in depth about the inner workings.
I know but it is such a cool little piece of equipment.
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Old 11-23-2012, 12:52 AM
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Haha, I'm sure that some shop in China is trying to reverse engineer it from the pictures as I type!
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Old 11-23-2012, 02:59 AM
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Nice idea.
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Old 11-23-2012, 04:42 AM
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if you get it working def patent it and start to sell. i would like to buy one
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Old 11-23-2012, 05:15 AM
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once u pantent it u will have to show us the insides
i rekon iv got a good idea how it works but i wont put it up just yet
looks great
hope it works great
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Old 11-23-2012, 05:45 AM
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What are your expectations for heat resistance and wear? If you could actually feather it like you said without wearing it out quickly it would be a god send for karts, let us make our own clutched gearbox's too
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Old 11-23-2012, 07:40 AM
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Nice work!

if you end up making them i'd be up for one with a 1" shaft diameter. Clutch dump burnouts with a GX390 would be fun!
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Old 11-23-2012, 09:44 AM
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Quote:
Originally Posted by B man View Post
Even though i already figured it out. haha
Quote:
Originally Posted by fowler View Post
i rekon iv got a good idea how it works but i wont put it up just yet
looks great
hope it works great
ALthough, I have not figured it out yet. I'm sure I'll be like "ohhhh, that's how it works" when I do find out
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Old 11-23-2012, 10:14 AM
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Does it work similarity to an automotive clutch? I've always thought making one similar would be pretty easy for someone with access to the proper tooling.
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Old 11-23-2012, 11:04 AM
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Excellent. Send me one for beta testing, and I'll have all the test data, conditions and reports to you ASAP! Please?
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Old 11-23-2012, 11:06 AM
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Quote:
Originally Posted by toystory_4wd View Post
Excellent. Send me one for beta testing, and I'll have all the test data, conditions and reports to you ASAP! Please?
Haha, smart!

I would love to see this working! Just awesome!
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Old 11-23-2012, 11:28 AM
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Very freaking cool! Looking forward to a demo.
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Old 11-23-2012, 12:20 PM
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Cool beans man!
Hope they work out well, I might want one... or 2.
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Old 11-23-2012, 04:24 PM
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Quote:
Originally Posted by devino246 View Post
Does it work similarity to an automotive clutch? I've always thought making one similar would be pretty easy for someone with access to the proper tooling.
think inside a modern manual box
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Old 11-23-2012, 04:46 PM
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Quote:
Originally Posted by fowler View Post
think inside a modern manual box
I can't get my head inside there!
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  #20  
Old 11-23-2012, 05:47 PM
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Really clean piece there, nice one.
What would you estimate you could sell these for and still get a good margin?
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