I have a 2008 ktm 144 sx pop the top twice, this bike has been down more than up! First do you know of any recalls on this bike? Second is there any after market piston for sale? This seem to be the norm for this paticular bike? Do you have any thoughts or suggestions on how to keep it together alittle longer? Thanks Scott Henning
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Hi, the only way you can move that piston while it sits in the cylinder is to find the main crank shaft, (located just above the oil pan). Fit a strong wrench to the bolt that attaches the pully to the crank, then, slide a length of steel pipe over the wrench for leverage. Start to rock the crank back and forth slightly but forcefully. Any oil that you poured will have seeped around the piston by now. make sure the other pistons are well oiled and give it a try.
how long was your bike sitting for when you did the new piston? change the old fuel out the tank if the bike has been stood for along period of time the fuel may have gone off. have you installed the piston the correct way round?
I'm not familiar with this bike but it sounds like it could be air locked and causing it to overheat.I found the best way to remedy problems like this is to get it up to temp,shut off and lay bike down too one side then the other.Tilt forward then back,check to see if coolant level dropped.If that dont work pull a vaccum on cooling system and see if it holds when warm.
HI suspect a sticky "slider" piston, or damaged
diaphragm, the vacuum chamber covers (chrome caps at the top of the carburetors) can also
be removed without removing the carburetors from the bike to check them.http://users.metro2000.net/~cdc/magna/tech%20section%20and%20issues/carburetors/carburetor%20page.htm
well i had the same problem with my old ttr 90 it smoked realy bad so i took off the top end an looked at the piston rings an they were fried so i bought a new piston rebuild kit an put it in an changed the oil an it ran like a champ an didnt smoke so thats what i think ur problem is