KX Riders

Maintenance & Technical => KX250 / KX125 => Topic started by: ATKpilot99 on July 28, 2015, 12:07:57 PM

Title: KX 125 smoking excessively
Post by: ATKpilot99 on July 28, 2015, 12:07:57 PM

I just did the top end on a 1980 KX 125 I recently purchased. It ran when I bought it and it smoked but at the time I figured it was just because it hadn't been run for awhile and I didn't run it very long. I probably should have. To make a long story longer the bike runs good but the smoking does not really go away or lessen. Could this be a bad crank seal and if so can it be replaced without splitting the cases ? Google searches don't show a whole lot on this subject for this model.

Title: Re: KX 125 smoking excessively
Post by: Foxx4Beaver on July 28, 2015, 12:12:51 PM

if it is a bad clutch side crank seal...you will have to open up the bottom end.

Title: Re: KX 125 smoking excessively
Post by: ATKpilot99 on July 28, 2015, 12:24:11 PM

Thats what I was afraid of. I've never done it although with the correct tools I probably could. How difficult is it and what would the cost be for tools ?

Title: Re: KX 125 smoking excessively
Post by: Foxx4Beaver on July 28, 2015, 12:32:48 PM

here's a breakdown...

(http://i895.photobucket.com/albums/ac152/foxx4afoxx2/Image_zpsnu7d3pna.gif) (http://s895.photobucket.com/user/foxx4afoxx2/media/Image_zpsnu7d3pna.gif.html)

Title: Re: KX 125 smoking excessively
Post by: Foxx4Beaver on July 28, 2015, 12:39:05 PM

Quote from: ATKpilot99 on July 28, 2015, 12:24:11 PM

Thats what I was afraid of. I've never done it although with the correct tools I probably could. How difficult is it and what would the cost be for tools ?

all you need are some patience...and you can get cheap case splitters/flywheel pullers on e-bay...or you can spend a few bucks and get a good one...

http://www.motionpro.com/motorcycle/partno/08-0245/

http://www.ebay.com/itm/Crank-Case-Splitter-Atv-Motorcycle-Dirtbike-Pwc-Motor-Engine-Puller-Crankcase-/281694530418?hash=item41964d6b72&vxp=mtr

Title: Re: KX 125 smoking excessively
Post by: ATKpilot99 on July 28, 2015, 12:54:01 PM

Thanks so much for the help. I think that would for sure be cheaper than the labor if I brought the bottom end to a shop.

Title: Re: KX 125 smoking excessively
Post by: Foxx4Beaver on July 28, 2015, 12:58:54 PM

absolutely...waaay cheaper.
try to find/get a manual as well...whether it be an oem manual or a Clymer.

here's a few to chose from...

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2059210.m570.l1313.TR0.TRC0.H0.X1980+kawasaki+kx125+manual.TRS0&_nkw=1980+kawasaki+kx125+manual&_sacat=0

Title: Re: KX 125 smoking excessively
Post by: alexander-vmann on August 10, 2015, 01:45:59 AM

you migth want to check your jetting and fuel/oil mix, before you split the case,

Title: Re: KX 125 smoking excessively
Post by: Foxx4Beaver on August 10, 2015, 07:17:19 AM

a leak down test would be best.