Question about 2002 Honda CR 250 R

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Need to split crankcase to clean out broken piston parts! Very stiff, seems very tight around main bearing. Any tips?

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  • dave625 Jul 14, 2009

    Hi Voodoo. Thanks very much for your help but the link you provided led me to a 1998 swinging arm not a 2002 crankcase! Tried searching from there but no luck. Could you repost the link please? Many thanks.
    Springer

  • dave625 Jul 15, 2009

    Hi Voodoo. I had another look and I can see all the parts now. Duh! Very helpful diagram but doesn't really answer my problem. Engine all stripped and I just need to split the crankcase, but it seems very stiff and won't come off the crankshaft. It has split maybe a couple of mm but no further, so I am sure all bolts are out. I am very nervous of hitting it too hard in case I break the crankcase or displace the main bearing from the case.Any idea if I do need to just hit it harder or is there anything else I need to be aware of? Thanks for your help so far. Springer

  • dave625 Jul 23, 2009

    Thanks onetatm8! Very helpful. Just used a bit more brutality on it with the mallet and it split! Cheers. Springer

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  • Master
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Just take it easy use a rubber mallet!!!!!!!! it needs to come apart SQUARE!
if you have broken the seal all the way around & it feals jammed check that you have nothing still left to remove!
DONT use pry,s [screw drivers inbetween the cases]or you will never get the two halves to seal again!

Posted on Jul 17, 2009

  • ROB Jul 23, 2009

    Hi springer, yes it can seem a liilte daunting lol

    Cheers Rob.

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  • Honda Master
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On some engines, the crankshaft bearing is a interference fit.

Sometimes a press is needed to not damage the bearing.
You might try a steering wheel puller.
Beings as you're clearing out broken piston parts, it might be a good idea to replace the bearings anyways.
If yours IS an interference fit, you'll probably need to heat the bearing and/or freeze the crank to reinstall.

Posted on Apr 01, 2013

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  • Master
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The parts catalogue in the link below will show you how to have the crank case opened and blown up. this will guide you to opening and closing it.

http://www.cmsnl.com/honda-cr250r-98-us_model7337/partslist/F++18.html

regards,

voodoo

Posted on Jul 13, 2009

  • marlon john madrid
    marlon john madrid Jul 15, 2009

    i have seen all parts possible in the link, did you just see a swing arm?

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Posted on Jan 02, 2017

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