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Old 12-20-2007, 08:29 AM   #16
dorkpunch OP
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Didnt even think of taking video... I'll have to work on that. Heres some more info on the how-to some of you have requested.

Parts required:

2- U-bolts
1- Old Ski (preferably with a good wear bar)
1ft- Angle iron
10ft?- Chain
1- Bolt and nylock nut

The ski is just an old ski off of a snowmobile- I think it came off a '70s ski-doo or a john deere liquafire. Mighta just come from the scrap yard. I removed the leaf springs leaving basically a flat ski. Went down to the hardware store and bought 2 u-bolts complete with nuts and metal straps that would fit over the tire. Cut the angle iron to fit over the back part of the u-bolt, line up where you want the wheel to sit on the ski, and weld the angle iron over the bolt like so:



I cut slots in the angle iron so it would be longer. I was worried about not having enough contact where the welds were because of the trough in the shape of the ski.



I still need to trim some of the threads off of my u-bolts, but I can get the ski on in about 5 minutes.
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Old 12-20-2007, 08:33 AM   #17
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Couple more pics:





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Old 12-20-2007, 10:06 AM   #18
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Cool. Nice job. Even if it sort of sucks it looks fun.

That is desperation inspiring invention!!
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Old 12-20-2007, 12:46 PM   #19
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Okay, so you're not totally retarded, just mildly insane. Methinks the cops up here would not want to go near the paper work that thing would gererate! I so have to try that!
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Old 01-03-2008, 03:59 PM   #20
Waspswatter
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I had this exact same idea last week, a fellow SMjunkie led me to this thread.

Dorkpunch, what is the handling like? Does it countersteer just like normal? Is the ski able turn without sliding out? Now, how about some videos?

I give this thread 5 stars

(edit) My first post!
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Old 01-03-2008, 05:18 PM   #21
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dude you are one sick individual! I love it
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Old 01-03-2008, 05:36 PM   #22
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Quote:
Originally Posted by dorkpunch
the front brake works great in that situation. I've been meaning to put a bungee cord from the ski loop to the triple clamps but i've never had a problem with it on this bike or when I had it on my XL, OR the version I had on my mountain bike.
The bungee is a great idea, but do it man. The result of a spin of the ski is catastrophic!

I install ski's on aircraft, the limit cables are priceless. Reason? When the ski leave the ground the forward bungee pulls the nose up and the tail becomes the first part to contact the ground. The forward cable (along with the bungee) limits the nose from digging in, and the tail from allowing berms into the frame of the craft/bike.

Limit cables...use them!
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Old 01-04-2008, 05:43 AM   #23
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I don't think the ski would grab anything for steering purposes on the street, Unless I'm wrong, you will need some snow or ice for it to work.


Also. Why not zip tie the front brake under pressure, that will hold the ski in place.
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Old 01-04-2008, 08:25 AM   #24
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You cant just zip tie the front brake on. The ski needs to be able to move freely up and down while your moving, ESPECIALLY when your turning. If you have the bike on a flat surface, lean it over a bit, and turn the handlebars while watching the ski, the ski tip actually comes "up". the ski is still flat on the ground, but the wheel will turn as the handle bars turn. Clear as mud? If you were to lock the brake on, basically the back of the ski would be coming off of the ground any time you tried to turn. Plus, it would lawn dart into any obstacle you hit- like the pic of me going over the snow pile, the ski followed the contour of the hill instead of stabbing it.

As far a handling goes: Yes, you need snow. It works best in between 1-6" of snow. Riding in hardpack and ice is a real handful but do-able. It would probably be a non-issue if I had a better wear bar underneath the ski that actually had the skags (thats what we always called em, not sure what the real term is- the sharp carbide parts on the wear bar). The problem with ice/hardpack is the ski is hard to turn and therefore its hard to keep your balance- OR the ski is to easy to turn and will slide out. Thats also what happens when you hit pavement...

When your in snow though, its pretty much impossible to get the front end to slide out. Its really a trip to ride, the front just sticks, the back end slides out and you kinda steer with the throttle by how far you let the back hang out. Havent ridden it a ton on the KTM but we put several hours on the exact same ski when it was attached to my XL350, and it would plow through deep (ie-up to the tank feet on the handlebars deep) snow, just not fast.
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Old 01-04-2008, 05:19 PM   #25
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Interesting post from a most flinty citizen
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Old 01-04-2008, 05:21 PM   #26
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Quote:
Originally Posted by Gusgus
The bungee is a great idea, but do it man. The result of a spin of the ski is catastrophic!

I install ski's on aircraft, the limit cables are priceless. Reason? When the ski leave the ground the forward bungee pulls the nose up and the tail becomes the first part to contact the ground. The forward cable (along with the bungee) limits the nose from digging in, and the tail from allowing berms into the frame of the craft/bike.

Limit cables...use them!
This advice will keep you out of the hospital!
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Old 03-03-2013, 01:08 PM   #27
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Here's my version! (inspired by yours)

http://www.supermotojunkie.com/showt...=1#post1546763
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Old 03-03-2013, 08:13 PM   #28
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Awesome! Ain't it fun to slide the back end out like that!? Thanks for sharing. Need to get mine back out someday, but *thankfully* the snow is disappearing quick around here!
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