2019 Small-Doo AMX

What was your intended objective when you started the build?

As light as possible, especially the minimum possible weight on the skis. With the longest caterpillar. Ambiently strong but not built for speed.

What motivated you to start your project?

Make a much lighter snowmobile that performs well in the woods at low speeds.

What was the most unique and creative thing you did to the sled?

Tubular aluminum chassis, carbon fiber panel, completely transformed Honda GX type utility engine, reverse gear with modified planetary inverter. Front suapension has very long travel, height and angle of the front suspension adjustable with a simple button on the handlebars.

What are you most proud of?

This ability in deep snow without the need to go fast

Videos

https://www.youtube.com/watch?v=9gnIxCv6AFk&t=360s

https://www.youtube.com/watch?v=FofuchHDC7s&t=68s

https://www.youtube.com/watch?v=IeSBL3xvgeI

One Comment

anonymous says:

April 29, 2026 at 6:51 am

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Submitted by: Benoit F

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Specifics

Classification: Wild

Make, Model & Year: 2019 Small-Doo AMX

Time spent: 5 months

Money spent: 10,000

Engine: Built from competition parts for GX390 engine, and reworked. 460cc, 1 cylinder, 43HP at 5500RPM, 47 ft lb at 4400RPM

Intake: TM36 carburetor

Exhaust: Home made compact Exhaust

Drivetrain: Comet Duster, #520 xring chain, no chain case, modified planetary inverter, Conquer 174” x15” x2.8” track

Tunnel/Chassis Modifications: Home made tubular aluminium chassis. Fiber carbon sheet

Suspension: Home made rear uncoupled suspension, ait shock absorber. Home made A ARM front suspension, Quick adjustment of suspension height from left to right or right to left, with a button on the handlebars.

Brakes: Hydraulique bicycle disc braque

Finish – Paint: Powder coating

Accessories: Led light, lithium ion battery, sled hitch