380 mountain mini

Sheetmetalfab

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$150



Strip and chop.





Narrow.



30" ski stance







Conduit bender with a "sleeve" over the 1/2" alum pipe.





Ez ryde knockoff rear arm mounting slots.





Taper



Groove



Hex broach to turn drivers that fit 1" hex shaft into 1 1/4 hex.

Used 7 tooth drivers are way cheaper than wahl bros.
 

Sheetmetalfab

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Well the first reason I did aluminum was because it's cheap.
The second was because it's going to be a eight-year-old boy riding it.
And it notches so easy with a end mill.
No paint or powder coating required. ( fan cooled so no melting snow to stick)
And welding alum is fun! :)

Going to use cromoly to build the skid.

I have an IQR front end I was going to Cut narrower and use but then I wieghed it compared to trailing arms and it was 7# more. :(
Decided to just go the easy route and keep the bulkhead and engine cradle.
 
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LoudHandle

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Theres areally a hundred ways to do every thing! Good job! Not sure the aluminum tube tunnel is stout enough but I'd like to find out for sure!

As for aluminum not being stout enough; I've built a few full mod Hillclimb sleds with 3/4" x 0.0625" wall 6061-T6 Aluminum square tube and as long as you take into account the direction and vector the forces that will be applied to it and triangulate accordingly. It will survive whatever you throw at it. I did run a small strip of thicker 1/8" plate where the Tison style M-10's mounted. And 1/8" wall rectangular tube for the rigid engine mounts. The only time I tweaked one of them (still ridable and did not notice the tweak until days later) was when CC Skidoo rebuilt the rear shock for me and put in some water contaminated oil, the shock locked in the air while jumping a catwalk at the Alyeska Hillclimb during competition. For a daily rider, I'd bump it to 0.080" wall aluminum, but I've progressed to CF wherever possible now.

Keep posting up the progress, it is always nice to see what others are doing, sometimes it gets me thinking and I change my approach to something.
 
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volcano buster

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Interesting concept.

I'm not familiar with that motor. Can it be pumped in power as the pilot gains mass over time? What are the plans for enclosing the engine?
 

Sheetmetalfab

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I do have some spare pro rmk panels and hood.
Might have to make them fit.

A 500 fan will bolt right in when/if the time comes.
I have 3 boys so it will just get passed down for awhile.

Already lining up a 98 700 rmk to build similar for when they get bigger.
 

VTMTcowboy

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Incredibly talented fabrication on that tunnel and bulkhead! Very impressive.
 
Jun 23, 2004
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Black Diamond, WA
That's going to be awesome!
My poor disadvantaged 8 yr old has to slog around on a ski doo 380 with only a 136x16 long track and narrowed Rev skis. Lol
Can't wait to see the finished product.
 
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