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bo young
10-02-2013, 11:21 PM
Here's my sad story I have an 1986 atc125m looks brand new the exaust valve was bent so I decided to just do a whole top end rebuild so get it all running good I get about 3 miles down the road and all I hear is grinding and it just stops to a hault I get home pull it apart and the transmission is all stripped and covered in metal shavings what happened:wondering
CodyRosa
10-03-2013, 04:07 AM
Hi, and welcome to 3ww. Its kind of hard to tell just by that description. Did you only touch the top end? If you touched the bottom end what did you do to it? Did you forget to tighten down something?

Also when you took the top end apart did the crank have any play, up and down play?

Do you happen to have any pictures of the bottom end split with gears showing?
bo young
10-03-2013, 01:09 PM
I only touched the top end and the crank was good
CodyRosa
10-03-2013, 02:36 PM
Hmm well that doesn't make much sense.. You must have had oil because i'd assume the top end would burn up before a bottom end. Do you have any pictures of what happened?

How much oil was in the the motor? What type of oil did you use? Was this oil old, and used?
bo young
10-03-2013, 03:23 PM
Yea ill try to get some up in a little while
kb0nly
10-03-2013, 04:46 PM
Dang that sucks... Especially since its an 86.. Going to be hard to find parts for it. You would probably be better off to try and find a complete motor to swap with if it got that much damage to it, unless the cases are perfectly fine, but your going to have to split the cases and really go through and clean it now if its worth saving. Keep us updated!
bo young
10-04-2013, 01:47 PM
i have an xr100 engine thinking bout just puting a bbr big bore kit on it and shoving it in
dougspcs
10-04-2013, 03:52 PM
Only thing that comes to mind is that something from the top-end wound up in the bottom end..a small piece of shrapnel from the 1st failure perhaps!

Once you got it running the shrapnel got run thru the transmission..insta-grenado!!

Since the engine and transmission share a common sump area its the only thing that makes sense..

Either that or you are just a really unlucky dude..some shlt happened, then after that more random shlt happened.

My money is on the 1st theory!!