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Thread: 85 250R case split need help

  1. #1
    Join Date
    Feb 2018
    Location
    Tennessee
    --
    21

    85 250R case split need help

    Anyone got any good ideas on how to split a case on a 250R 85 without buying a tool. All bolts are out , cases at about a 1/16 of an inch split but cannot get it to slip over the crankshaft what side should it slip off of ?

  2. #2
    Join Date
    Jan 2012
    Location
    Carthage NY 250r rules
    --
    2,345
    Take the counter balancer out or turn it.It may be catching on the case it has to be a certain way .
    250r rules

  3. #3
    Join Date
    Feb 2018
    Location
    Tennessee
    --
    21
    Counter balancer is completely out all bolts are completely out I cannot get the cover to slip over the crankshaft

  4. #4
    Join Date
    Jul 2009
    Location
    South Florida
    --
    6,725
    On the stubborn ones I’ll heat up the case around the main crank bearing with map gas and lightly tap the crank with a brass .
    It is will come out easily this way .
    Just make sure the shift drum isn’t holding it .
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  5. #5
    Join Date
    Feb 2018
    Location
    Tennessee
    --
    21
    Do I need to put it in neutral I'm not understanding what you mean by shift drum holding it . This is the first time I've ever split a 250R case

  6. #6
    Join Date
    Jan 2012
    Location
    Carthage NY 250r rules
    --
    2,345
    The counter shaft side should come off. Did you remove the sprocket.I have always used a rubber mallet. Heat always helps as stated above.
    250r rules

  7. #7
    Join Date
    Mar 2010
    Location
    Slidell, LA
    --
    4,737
    Stator side should be facing up when splitting. Seriously buy the case splitter tool. It pays for itself in one use. The tusk is a quality brand. It will save you a bunch of headaches and time. Link below with free shipping.

    https://m.ebay.com/itm/Tusk-Crankcas...ss!63304!US!-1
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    Need something blasted or polished or both? Send me a PM

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