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403
Joined
5/21/2017
Location
Shelby, NC
US
Have posted on here about my case issue. Deciding just to replace it instead of rigging it up. Looking for the left side. I have checked eBay and can’t find anything that is worth buying for a reasonable price. Will pay for shipping of course. Let me know if you have one or know of a company that may have one.
Paw Paw
Paw Paw
The Shop
If the crank comes out with the bearing on it, just pull it off (with the proper puller) and reuse it as it has not been used or heated yet.
This puller works great.
https://www.harborfreight.com/bearing-separator-and-puller-set-62593.ht…
Paw Paw
Paw Paw
The right side case BF1-15121-01-00 is still used all the way through the 2020 bike according the fiche. The left side case changed for the neutral switch as already mentioned. Zipty Racing sells a block off kit for the nuetral switch case indicator, so the bike will work with out the switch and I assume could use an earlier case.
The 1999 through 2001 case can also work if you are willing to enlarge the inner diameter of the swing arm arm pivot bolt bushing that is pressed into the cases. The swing arm pivot bolt was enlarged in 2002 and that is the only difference.
I've successfully mixed and matched a number of 02 and newer cases with the 99-01 cases without issues on engines I've repaired and rebuilt.
I'd have to defer to someone more knowledgeable to give a good explanation of why some makes and models are and some aren't. I'm no pro wrench or engineer, but have rebuilt a fair share of YZ250 motors.
The YZ250F cases are only sold in sets and cheaper, the set is just a bit more in price as one half on the YZ250. Yet I know its not a 2 vs 4 stroke thing as Kawasaki only sells their KX100 cases in sets.
I've also heard that a place like Pro Circuit can take a set of YZ250 cases and "match" them, but for the average Joe C level rider it isn't worth it. I believe the matching is the surface where the cylinder comes together with the case halves. This is just the little I've read online and heard, I have no real idea of the benefits pro or con and what it entails. I could only guess that with the makes and models that don't come matched, the base gasket is enough to compensate for any differences or irregularities. Just a guess. Hopefully someone with a deeper knowledge can chime in.
Pit Row
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