20 Most Recent 2008 KTM 250 SX - Page 7 Questions & Answers


no
any single blinker will work , probably at a faster rate if the other same side blinker is not operational
check the wiring back to the switch and check the blinker can

KTM Motorcycles | Answered on Feb 19, 2016


Too many possibilities for this site. Get hold of a local biker/shop to help.

KTM Motorcycles | Answered on Feb 17, 2016


if it is running and not making any noises then I would only consider the piston, rings and liner as a last resort
If it has valves , (4 stroke) , check the valve clearance and adjust to specifications as valve stems get longer when hot and if the clearance is not sufficient when cold then a valve will be held slightly open when hot
next check the coil and ignition module and the timing

KTM Motorcycles | Answered on Jan 02, 2016


check for a bare wire touching metal .

KTM Motorcycles | Answered on Dec 24, 2015


and neither you should have to
as it is a 2015 make , why have you not taken it back for a warranty fix
next you would be using a single point plug ( car plug) when it would be better to use a mulit point plug ( anti fouling plug) that is available from good spares shops , motor bike shops and marine shops You mention that it fouls after sitting over night
can you comment of the fouling condition( wet , black, oil ,carbon build up etc ) as the information all points to a problem area.

KTM Motorcycles | Answered on Nov 19, 2015


You need 3 thing to make an engine run.spark at the right time ,fuel /air ratio to be correct,and compression.Isuspect you have tight intake valves.The valves are to tight letting compression out.To adj valves take your plug out put motor on tdc compression stroke .intake should be .006 exhaust .008.If this checks out to be ok you may have a fly wheel key that sheared and your ignition timing is off.

KTM Motorcycles | Answered on Sep 26, 2015


Its not to bad .You will need to purchase a shift shaft a shift shaft seal and a primary cover gasket and oil.First drain your oil.Remove your kick starter .Remove your primary cover.Remove entire clutch assembly.You will need air gun or a clutch holding tool to remove the clutch.Once you have the clutch assembly removed yuo can remove the shift shaft .Pay attention to the postion of the shift shaft in relation to the shift drum .Also pay attention to any shims on the shift shaft as that will need to be installed on the new one.Now remove the seal that the shaft was coming out of.Replace the seal install the new shift shaft.Make sure to center it in relation to the shift drum.clean every thing with brake cleaner.clean gasket area .Install the clutch assembly .If you have any trouble with the oriantation of the parts you can look at world of power sports for parts diagrams.Make sure you tighten the clutch hub to the proper torque spec.I would use blue loc tight on the nut as well .If you have a shop do it expect to pay about 2 hours labor max.Plus parts

KTM Motorcycles | Answered on Sep 26, 2015


Brand new ngk plugs are pre gapped but in thousanths .28 to .32 works

KTM Motorcycles | Answered on Sep 26, 2015


These bikes ran hot from brand new.Im guessing that the radiators are in good shape and the water pump is also?If so try running evans coolant.If your riding in a lot of slow speed enduro single track you may want to consider an electric fan available from your local ktm dealer.

KTM Motorcycles | Answered on Sep 26, 2015


Hi im guessing your year to be 1981 or 1982.First if you have not done so make sure your coil is grounded.Next disconnect your kill switch.Next check the primary side of the coil .3 to .5 ohms check the secondary side of the coil 5k to 7k ohms with out the spark plug cap.While your at it check for spark with out the cap.Make sure your kicking it fast as motoplats do not spark below 700 rpm.If all else fails you have a few choices .Vance smith can rebuild yours for under 200.00 usally.You can go with a pvl ignition for around 500.00.Also make sure your crank bearings are tight and your mag side crank seal is not leaking if you smell fuel in the mag cover you need to replace your crank seal good luck

KTM Motorcycles | Answered on Sep 26, 2015

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