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  1. Sledding - General Discussion
    Is there a chart somewhere that indicates rotary valve part numbers along with they're respective cut off section degree angle? Such as: #924 200 cut off section 132 degrees #924 202 cut off section 117 degrees #924 207 cut off section 151 degrees We have a snowmobile 582 from the...
  2. Sledding - General Discussion
    Some info I have found from the web, some from Skidoo Race manuls: Rotax 582UL(Skidoo 580/582/583) Maximum power 65HP / 48KW @6500 RPM Maximum torque 55.3ft-lb / 75NM @6000 RPM Maximum RPM 6800 RPM Bore 2.99" / 76.0mm Stroke 2.25" / 64.0mm Displacement 35.44cu.in. / 580.7cm³ Compression ratio...
  3. Sledding - General Discussion
    LOOKING FOR CYLINDER PORT MAPS OF THE OLDER SKIDOO 277, 380, 440, 503, 470, 580. 582. 583, 617, 670. HEIGHT AND WIDTH OF EXHAUST PORT IN mm, AND DEPTH (OUTSIDE OF PORT TO PISTON DISTANCE) in mm. Using this guys programs "Pipe Designer" and "Cone Layout". http://ypvsbox.free.fr/ also this Cone...
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