Snowmobile Engine in a Dirt Bike

Discussion in 'Some Assembly Required' started by ScottyWarpNine, Aug 22, 2018.

  1. ScottyWarpNine

    ScottyWarpNine Where's the trail?

    Joined:
    Aug 15, 2015
    Oddometer:
    133
    Location:
    NE Ohio
    I'm putting a snowmobile engine in a dirt bike. 290cc, 2-stroke, 2 cylinder, Kohler.

    [​IMG]

    Frame is a 1984 Honda XR200R.

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    The secondary variator pulley and a countershaft with the front sprocket is gonna go right there.

    [​IMG]

    I'm looking for a project name. I'm thinking "Red Snow" or "Satan's Sled"

    Discuss.
    #1
  2. 9Realms

    9Realms Drawn in by the complex plot

    Joined:
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    Central Mn
    You'll poke your eye out!

    I mean, it's going to go like hell, and be a danger to children, the environment and small animals.

    COOL :clap
    #2
  3. NorthernTraveler

    NorthernTraveler Long time Adventurer

    Joined:
    Jan 1, 2009
    Oddometer:
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    Location:
    The Big Mitten
    My ARMY recon motorcycle in 1977 was a Rokon RT-II.
    It had a Sachs 340cc single snowmobile engine with the belt/clutch setup.
    Pulled out of the bottom end and just kept going. Faster than hell. 80 or so.
    Good luck!

    PS - I have an 84 XR200 chassis around here.... made to engine mounts to use the standard 2 valve engine - the 4 valve was POS!
    #3
  4. Tanshanomi

    Tanshanomi Your Favorite Uncle

    Joined:
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    I have toyed with the same idea for years. Mounting the driven pulley will take some serious frame fabrication. Bravo to you for taking on the challenge!
    #4
  5. XR4EVER

    XR4EVER 919 excuses to ride!

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    Post Falls, ID
    :lurk
    #5
  6. Luke

    Luke GPoET&P

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    2nded. That's a great name for this.

    :lurk
    #6
  7. MacNoob

    MacNoob piney fresh

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    The mosquito-y Center of Canada
    :lurk
    #7
  8. fast1075

    fast1075 Fasterizer

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    popcorn gif.gif
    #8
  9. Fast Idle

    Fast Idle Since the Sixties

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    That will be a fun project! Better have some good brakes. :photog
    No hijack intended here, I had a bike with snowmobile torque converters once.
    Had two Suzuki 500 Titan motors with the transmissions cut off. Got it on a trade but never rode it. It needed new cylinders and I couldn't afford them so I traded it off a few months later. Here we go with the 20/20 hindsight again.:baldy

    scan0002.jpg
    #9
  10. fast1075

    fast1075 Fasterizer

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    It needs chambers, radical ports and a pair of lectrons! and some Klotz Green Label for the good smell!!!
    #10
  11. ScottyWarpNine

    ScottyWarpNine Where's the trail?

    Joined:
    Aug 15, 2015
    Oddometer:
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    Location:
    NE Ohio
    I'm calling the lower engine mount done. I still need to make some sort of a mount for the top of the engine that bolts to the head. I'm going to try to mount the starter motor under the engine inside the mount, but if I can't do it I'll just ditch it. I was thinking of running without a battery anyway.

    [​IMG]

    Before anybody says anything, I'm definitely not a professional welder. This was done using a cheap Harbor Freight stick welder. They're ugly, but it seems pretty strong. Once everything is fabbed up, I think I'm gonna paint it all with red bedliner.

    [​IMG]

    That just looks right, doesn't it? I finally have a use for this crappy old CB750 tank. I didn't put the Punisher decals on it.
    #11
    smilin jack, JagLite and FR700 like this.
  12. JagLite

    JagLite Long timer

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    One thing I have learned about welding, the more I do, the better I get with my grinder! :imaposer
    #12
  13. bk brkr baker

    bk brkr baker Long timer

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    [​IMG]

    Ted Wilkins hillclimber. I saw Ted run many years at the Devil's Staircase in Ohio.
    #13
    smilin jack, h0lger, jays100 and 11 others like this.
  14. dirt hokie

    dirt hokie Long timer

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    a welder and a angle grinder is all anyone needs to achieve the impossible.
    #14
    FR700, Junglejeff1 and JagLite like this.
  15. ScottyWarpNine

    ScottyWarpNine Where's the trail?

    Joined:
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    NE Ohio
    I just bought a used Hobart Handler 140 MIG welder, so future welds may be slightly prettier.
    #15
  16. fast1075

    fast1075 Fasterizer

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    A 40 grit flap disc for your angle grinder would go a long way towards good surface prep.
    #16
  17. fast1075

    fast1075 Fasterizer

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    That is one wild hill climber!!! Did it burn nitro? Love me some 2 smokes!
    #17
  18. jimroid

    jimroid Been here awhile

    Joined:
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    Pisgah Forest,N.C./USA
    Good luck, I am an engine transplant kind of a guy . 4756F558-6232-4173-8347-847017A38D74.jpeg
    #18
  19. gmk999

    gmk999 ____ as a Rotax

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    Will it reverse?
    #19
  20. more koolaid

    more koolaid Been here awhile

    Joined:
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    Bel Air Md.
    "Ted Wilkins hillclimber"
    Is it me or is that motor upside down?
    #20