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View Full Version : 125m Motor Swap Questions


zppeacock
11-23-2009, 10:15 PM
What other motors fit in a 125m? I was thinking a 110 with cdi. I was looking at both wiring diagrams the only major differences that I can see are the 85 125m has 2 yellow wires coming out of the alternator, and the 84 110 only has one.

Has anyone done this swap? Could the 2 yellow on the 125m harness be combined to work with the 110?

http://www.files.3wheelerworld.com/Wiring/ATC110x82Thru84.jpg
http://www.files.3wheelerworld.com/Wiring/ATC125Mx85.jpg
zppeacock
11-23-2009, 10:49 PM
will at 110 with cdi work?
zppeacock
11-24-2009, 08:50 AM
noone has ever swapped one?
zppeacock
11-24-2009, 10:22 PM
:( no info on this subject?
zppeacock
11-25-2009, 10:06 PM
wow, no one has any comments
1985BigRed250ES
11-26-2009, 12:21 AM
not sure on the wiring stuff. might try an older 110 motor that has two wires, or just try to find a decent 125m motor.
zppeacock
11-26-2009, 12:41 AM
not sure on the wiring stuff. might try an older 110 motor that has two wires, or just try to find a decent 125m motor.

the 110 does have 2 wires coming out it, but the 125m has 3, 2 yellow and another.

I would like to get another 125m but I cant find one decently priced.
leevarnado
11-26-2009, 12:59 AM
i have one that runs but smokes and shifts through all gears good,i can get some pictures in the next few days.how does $125 sound shipped.
zppeacock
11-26-2009, 01:01 AM
how bad does it smoke?
leevarnado
11-26-2009, 01:12 AM
smokes like it will need a set of rings soon.i let my bother in law borrow the engine so he could use it for a mock up on a go cart,when ever i get the engine back i will take pictures of it and try to post a vid of it running.
zppeacock
11-26-2009, 01:20 AM
smokes like it will need a set of rings soon.i let my bother in law borrow the engine so he could use it for a mock up on a go cart,when ever i get the engine back i will take pictures of it and try to post a vid of it running.

Cool, do you know about when you will get it back? The motor that I have, before it threw the chain, had 44psi compresson, started first pull and smoked like a train, so If yours doesnt smoke like a train, ill probley want it.
oscarmayer
11-26-2009, 10:16 AM
when you get it, do a top end rebuild! it'll wake it up a ton!!!
may consider a weisco performance piston too while your at it.

but then again by the time you spent the $ you coudl havbe gotten a new liflin 140cc drop in with reverse and manual clutch and electric start!!!