2003 KTM SX 125 Logo
Posted on Feb 18, 2009
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Tyre pressures and oil grade.

Just bought a 2003 ktm 125sx. just like to know what engine oil i should use. ans what the rear tyre pressure should be set at. any hints or tips about keeping the bike in top condition would be appreciated as its my first bike cheer. tom also do you know if there is any kind of manual like a haynes for these bikes cheers.

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  • Posted on Feb 18, 2009
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Gearbox oil-20w/40 0.73 qts. cooling system-1.26 qts. 50/50 mix 2-stroke oil-shell racing x/40 fuel grade-98 spark plug-ngk r 6918-b8 spark plug gap--.024" main jet-190 idle jet-48 needle position-3 pilot screw # of turns out-1.5 rear tire pressure-14 lbs front tire pressure-14 lbs keep air filter element well cleaned & oiled w/ air filter oil.there are service manuals available for this model.

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  • Posted on Apr 02, 2009
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Hello , first of all i have always used putoline gear light in my 125sx , i ride most weekends and change it every 4 to 6 weeks and it has always been fine . my trye pressure at present is 15psi front and back this is a good starting point but try to find out what suits you and the tracks you ride on.
as to the other part of your Q i run my bike 33 -1 which is around 150mm of 2 stroke oil to 5 litres of fuel , also i use putolione mx5 oil which i beleive to be one of the best. hope some of this helps tom ........dave

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