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  1. Vintage Classifieds
    I am looking for a pair of cylinders that are still within STD piston spec. The Cyl's I have are just a little too worn out to use with my brand new STD pistons. Trying to keep it a TNT engine instead of using alpine parts. If this doesn't pan out, then I am interested in oversized pistons to...
  2. Vintage Ski Doo's
    When was a liquid cooled 640 in production and what chassis was it used in.I can't seem to find any info on a L/C 640 or that such a motor ever existed.Does anyone have any knowledge about this
    640
  3. Vintage Classifieds
    When was a liquid cooled 640 in production and what chassis was it used in.I can't seem to find any info on a L/C 640 or that such a motor ever existed.Does anyone have any knowledge about this
    640
  4. Vintage Ski Doo's
    ive got an old 640 alpine motor i wanna get running. tons of compression and its got spark. i dont have a tillitson or mikuni, but u have a walbro wf style carb. anyone know what i should set the adjustment screws at? thanks.
  5. Vintage Ski Doo's
    Hey just want to get some opinions on this. I have an older 8x8 Argo ATV that I have rebuilt with all HD parts and chain. I love the classics and the classics had 2 strokers in em' so that's what I'm going for this time around too, just none of the "kohler" nonsense!! :laugh_old: (Argos used...
  6. Vintage Ski Doo's
    ok heres the deal I posted a wile ago trying to figure out what type of sled that I had cuzz who I got it from had painted it all up and what not I figured out that its a 1971 ski doo Nordic with a 640 rotax wich we finally got running realy good the other day the problem is we had the...
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