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    Which year skidoo snopro engines were the same?

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    • Member since
      February, 2011
    Which year skidoo snopro engines were the same?
    Posted by pierre3535 on Thursday, January 19, 2012 9:56 AM

    I would like to know which year the sno pro engines were the same or similar, I have a 78 motoski that I beleive should have had a 340 but a 78 engine may be hard to find, so which parts from other years can I look for?

    Also how about the 250 and 440?

    I've also seen 500cc advertised in some of the 78-79 sno pro sleds, was there a production run of 500 cc sno pros? They call them 500SS.

    Thanks

    • Member since
      July, 2005
    • From: Lower Michigan
    Posted by MiModRacer on Sunday, January 22, 2012 9:26 AM

    78 & 79 cyl were similar probably slight difference in porting.  A 79-80 7500 would have 340 lq cyl.  I know that some guys used the 79-81 9500 cyl in 440 OM.   I think as I recall they had to shim them thicker on the base gasket besides porting them to use them.  These cyl stock were steel sleeved vs nickasil but they could be made to work.  Alot of the 340 sno pro cly were put into the 3X 500 om.  ( With Decker, or Fast 3x aftermarket Cases)     The Nickle cyl is what your after if your going for OEM...  It maybe tough to find a set not ported to drag specs.   I'd maybe bump Jamie Bellman in the racing section to see if he knows where any are or Phil Barr .  Another possibility would be Dean Schroeder,  He has built several Eagle River winning 340 motors over the years.   His Ph # is 715-526-3200. He is located in Shawano Wi.

    Good Luck

    MMR

    PS,   I have never heard of a production run of 500cc 61 stroke sno pros .  Some guys tried boring up 440s to 500cc  but thats the only ones I'm aware of.        You might be able to swap those 440 cly for 340,s if you find someone with a set. But I wouldn't do that unless their Nickel.   You also need to determine if you have 340 or 440 pipes on that sled.  Pump the above names for as much info as possible.   I'd call Deckers too if these guys can't help you.

    • Member since
      February, 2011
    Posted by pierre3535 on Sunday, January 22, 2012 8:12 PM

    Do you know which year the base were sand cast, some say it depends on the serial number, some same the base and cranks were the same as consumer sleds.

    • Member since
      July, 2005
    • From: Lower Michigan
    Posted by MiModRacer on Sunday, January 22, 2012 8:40 PM

    That I don't know.   Its a good question for you to ask the people I mentioned.

    MMR

    • Member since
      February, 2011
    Posted by pierre3535 on Monday, January 23, 2012 8:33 AM

    Hi,

    That phone number is the sheriff's. LOL

    Thanks

     

    • Member since
      July, 2005
    • From: Lower Michigan
    Posted by MiModRacer on Tuesday, January 24, 2012 5:57 AM

    Really ??SurpriseStick out tongue try this E mail not sure if its current but worth a shot.  

    Dean Schroeder <cny48100@centurytel.net>;

    • Member since
      August, 2010
    • From: The County
    Posted by doodoc on Sunday, February 05, 2012 5:22 AM

    The year the crankcase was manufactured is cast in the case/re-77 cast in the case would be a 78 model year.

    Jim Jones    KASRA  Tech Director   BRP Master Tech.   Arctic Cat Catmaster Certified   Yamaha Golf Car Certified   

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