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  #1  
Old 01-20-2013, 11:03 PM
ddowns46 ddowns46 is offline
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Default Manual Clutch for Horizontal Shaft Motor

Anyone interested in a manual clutch for horizontal shaft motors? It would be similar to a slide on centrifugal clutch, but would allow the user to operate the clutch with a cable. This would allow the user to have much quicker starts, feather the clutch around turns, burn-outs, donuts, decompression braking, etc. As far as I know, nothing like this exists...
Thoughts?
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Old 01-20-2013, 11:10 PM
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MASTERBATES MASTERBATES is offline
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this sounds interesting. id like to see this in action on a project. and im sure many more friends one here would like to know more about this
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Old 01-20-2013, 11:47 PM
ddowns46 ddowns46 is offline
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Attached you'll see pictures of one of our first prototypes. The clutch was designed by myself and my brother (both engineers).

Also, here's a couple videos of this thing in action.

http://www.youtube.com/watch?feature...&v=9DXW6k73b5Y

http://www.youtube.com/watch?feature...&v=_E14X_aGrYk
Attached Images
File Type: jpg Manual Clutch Prototype 2.jpg (11.1 KB, 16 views)
File Type: jpg minibikeclutch1.jpg (50.9 KB, 14 views)
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Old 01-21-2013, 09:52 AM
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How about a video with ti being used on an off road buggy like are on this site!? Now that would draw our interest!!!
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Old 01-21-2013, 10:33 AM
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SLESTAK75 SLESTAK75 is offline
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Agreed!
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http://www.youtube.com/watch?v=3hx-hEWl10c
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Old 01-21-2013, 02:22 PM
ddowns46 ddowns46 is offline
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We'll get there, baby steps first!

Just a couple questions:

What size crankshaft is typical on a mini buggy? Do you guys run a standard PTO crank with the four bolt pattern?

Currently, we are about to go into production with our 3/4" #35 chain unit but we have plans to manufacture a 1" and 1-1/8" unit fairly soon. Also, the design allows for the selection of any sprocket size and pitch above the minimum.
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Old 01-21-2013, 02:34 PM
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Most production buggys use some variation of CVT mated to the engine, but I would LOVE to see a 21hp v-twin B&S tearin up the trails in a buggy frame. Oh, the possibilities!!

I would say, as 1", and 1-1/4" clutches are almost non existent, you might find your market there. I already like the idea behind choosing your own sprockets, that is a head ache when looking for cent. clutches now.
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Old 01-21-2013, 04:46 PM
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Oh the madness, the sweet frickin' madness!!!!!!!
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Old 01-21-2013, 06:41 PM
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i likey, i likey
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TM 150 XRX-P&P head,A13cam,opened exhaust,140 main,38 pilot,adj cdi, perf coil,115mm variaitor,12 gm rollers,NCYpulley,2000 rpm springs,racing clutch,taller rear tires,and etc.
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Old 01-22-2013, 11:19 PM
ddowns46 ddowns46 is offline
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Just to keep you guys in the loop, here's a set of renderings for the 3/4" 14 tooth #35 chain production parts. The finish will be black oxide coating, these things will look nice!

http://i.imgur.com/mj4l7Ac.jpg
http://i.imgur.com/4JiMpFQ.jpg
http://i.imgur.com/JkYzWb4.jpg
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Old 10-15-2013, 03:39 PM
ddowns46 ddowns46 is offline
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Hi guys,

I know it's been a long time since I've posted but we've made some great progress since then. Check out our website http://www.downsbrosracing.com For videos and more information!
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Old 10-15-2013, 06:24 PM
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Not bad, I like the vid where he eats it on the mini bike!

I was wondering what happened to you guys, actually almost forgot about your designs.
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Old 10-19-2013, 08:32 PM
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honestly, I don't see where it would help us with our buggies, maybe someone could explain how it would to me.
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Old 10-20-2013, 07:05 AM
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more for the home built using a horizontal shaft engine on a yard kart type of ride ---something metalmech may want to utilize.
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