20 Most Recent 2001 KTM SX 125 - Page 8 Questions & Answers

If the bolts are spinning you will have to drill off the bolt heads and extract the threads from the base inserts. Replace the petcock base o-ring, epoxy the base nuts into the tank body, install petcock. Or replace tank and valve. It's a choice of time or money.

Carburetor issue. Running to rich, water in carb and tank, or filthy air filter

The ring is too keep the pipe from damaging the cylinder. The o-ring on the pipe is what seals it from leaking.

You must keep the fuel tank at least half full

buy one from your dealer.

get yourself a workshop manual to do this properly

No the starter relay is seperate ! check all fuses and ignition system connections !

rewinding a stator is not difficult, find the right wire, better is square wire, as the heat conductance is better. If you select the same diameter you get automatically approximately the same amount of windings as the original. The sell the wire on Amazon and other places, Bing is your friend.

have you got a spark and is fuel getting to the spark plug ? check these and you might have your answer ! P...

have u tried a new plug ? is power gettin to coil , put plug in cap and hold against a good earth point on head and crank over and see if plug sparks , if you dont see a spark try holding the plug and crank engine and if you dont feel voltage in your hand then remove cap off ht lead and repeat and if no voltage then check kill switch , if ok then check coil wires etc !

sounds like you bent a selecter fork in gearbox ! need to strip engine and check all parts inc cogs and bearings !

Sounds like idle jets are still clogged, they are really small and unless you check them, a standard cleaning of the carbs may not clear them. I use a nylon bristle pulled from a scrub brush to **** out the pilot jets.

i think you got gearbox problems

Starter relay

increase the fuel intake it should be a little screw

well which problem is it... wiring or acceleration ???

is the gear leaver returning to position after trying to select a gear.it could be that the shaft from the leaver is bent or the drum is stuck or return spring is broken.

You could have worn down all the friction material on the clutch and what you are hearing is the rivets on the clutch rubbing on the flywheel in the absence of sufficient friction material.

Tube inside of tank has a hole in it.

sticking float or main jet