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Found 2 results

  1. Mikethe80srocker

    Crank bearings , what one's are best ??

    I'm goning to be starting on my engine rebuild soon and i was wondeing what brand of crank brg is the one to go with ?? Factory bearing in my bike was a Koyo 6206c3 , my local bearing guru tells me that a FAG brand is a better choice , or a SKF ... Is he right ?? I only want to be inside this engine once ... Opinions wanted please !! Thank you .
  2. ben333

    Coolant leak?

    My 2004 250EXC steams through the breather hole when I start it. It doesn't even last a 1 minute before it stops. Coolant level is down only slightly after a 60+ mile enduro. I use Evans waterless coolant. Has been like this for about half the season. I have taken off the head and checked the gaskets, they seem to seated properly. I can't find any cracks anywhere. Now my crank is showing signs of trouble, only 117 hours on the crank it the rod is moving side to side more than has in the past, more than it should probably, seems like the rod bearings are going bad already (no up and down play, just side to side). The crank will need replaced or rebuilt soon, too soon. All this tells me that radiator fluid is getting down in the bottom, unless I am wrong. I have replaced the water pump seal twice (although I think that would only allow water to get into the clutch, not the bottom end). What else could be happening? How can I find this leak? Is it a cracked head? Internal crack in cylinder? How do I find the source of this? Thanks.