Maintenance & Technical > KX250 / KX125

1998 KX250 engine cases ok to mismatch?

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lfullbright:
Ok.....I'm new on here but I am building a 1998 KX250 for a friends son from the ground up.  The right engine case was damaged and I found a right from a 1999 bike at salvage yard in good condition and now I am concerned with some of the research I have done that using the 98 left and the 99 right (although they show the part numbers are correct and same) could cause an issue due to the matching/line boring when new, etc.  This project is definitely on a budget but I don't want to create a problem by doing this.  Is there any definitive "don't do this" advice that this will be a problem.  From what I can find it looks like there are opinions pointing both directions on this and thought I would ask some that I know are more familiar with something like this than I am-
Thanks for any help-
Lee

fatdaddy:
how'd it go joining the 99-98 cases?

sandblaster:
They should have interchanged with no problems.

Frosty503:
What if it’s a 99 left side case with 98 right side case. Just found out my right side is cracked! Is it possible when splitting the case it can crack?

Kawafornication:

--- Quote from: Frosty503 on March 18, 2019, 03:36:19 PM ---What if it’s a 99 left side case with 98 right side case. Just found out my right side is cracked! Is it possible when splitting the case it can crack?

--- End quote ---

If you have the correct tools no risk of cracking cases! If you are not confident or do not want to invest in the tools I would pass the job on to a pro, sometimes it is easier to stick to what you know and earn your cash in the job you do day to day, you miss one washer on a reinstall and you have to do it all over again where as if a pro messes up you take it back!


https://www.youtube.com/watch?v=zIcWDCEXxGo


https://www.youtube.com/watch?v=p0LK30KVWJg



https://www.ebay.co.uk/itm/Tusk-Crank-Case-Splitter-Separator-And-Crank-Puller-Installer-C-Clip-Adapter/173576550865?hash=item2869f7f9d1:g:55QAAOSwHJVbSRq1

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