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blowing smoke please help

Joined
May 15, 2007
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#1
380 blowing lots of smoke help!

Hello I have a 1999 ktm mxc 380 and it is blowing lots of smoke enough that it is dripping out of the tail pipe. I have just rebuilt the top end with a sleeve,piston, etc.... I was told that it could be the crank shaft seals {sucking oil from the trans ? } any help would be greatly appreciated as this is my first ktm. thanks Gregg
 

thorman75

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#2
if it is the trans side crank seal your trans fluid level will drop. Fill it up, go ride, if it's dropping theres your problem.
 
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#4
bdtoady22

i ride a 94 yz 125 and the crank seal was bad in it. the easiest way to tell is watch your tranny oil level. in 2 hours of riding i would burn almost half of it. idling down a hill and turn and power up it would smoke like a freight train. i would say thats your problem
 
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#5
smokey

it blows a lot of smoke like you said "like a freight train" the oil that is leaking is black.also when I rev it, it doesnt have full power. thanks so much for the replys I am kinda new at this stuff. Gregg
 

Chili

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#7
I've merged this thread and the one you posted in the KTM forum, Please do not post the same thread in multiple forums.
 
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#8
I would say you for sure have some leaking seals. Seeing as it has a lack of power, lots of smoke and dripping black oil/spooge out the pipe.
 
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#9
sorry about multible posting didn't know exactly were to put it. anyway I think it is the seal in the trans because the level is low and I have only driven it around the yard two times. thanks for the info and I will post when I repace the seal.