Question about ATK 125 2-stroke Motorcycles
Hi, Cody the following applies to carbureted also fuel injected models and the usual suspects are:
1. Severely discharged or a damaged battery, 9 volts or lower.
2. Faulty alternator/generator and or voltage regulator.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Faulty main circuit breaker or ignition switch, check for loose connections and continuity.
5. Faulty system and or ignition relay, check for continuity.
6. Faulty ignition coil, ignition/electronic module.
7. Faulty CKP, CPS, CMP, MAP, TPS, O2, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Water or dirt in the fuel system, carburetor or filter.
9. . Restricted, blocked or kinked fuel line.
10. Fuel tank empty.
11. The gas cap is not venting properly or fuel tank venting system blocked.
12. A faulty Fuel Pump, pressure regulator and or fuel injectors.
13. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
14. Needle and seat stuck closed in the float bowl.
For more information about your issue, please visit the websites below. Good luck and have nice a day.
Posted on Oct 31, 2015
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Posted on Jan 02, 2017
The most likely cause is moisture trapped inside the spark plug caps. Slide each one off of its spark plug, then spray inside the cap with WD-40. Do the same for the end of the spark plug where the cap goes on. Remove the excess WD-40 with a clean paper towel. WD-40 is non-conductive and will remove the moisture (which is highly conductive).
Posted on Nov 27, 2009
check the engine compreshion,,is it low??????
check the air filter is clear the engine needs to breath,,,
check your getting full throtol,,,silly i know,,but?
check that the carb is not flooding and that no jets are blocked up,
check there is a good flow of fule from the fule tank to the carb,
check the ingition timing is spot on,,if its out ,,,fix it!
change the spark plug,, for the right plug!
check that nothing is draging,,like brakes! or slipping like clutch?
if the gear box it partly sezed up,,its going to be hard to turn the rear wheel when in gear with the clutch pulled in,,,
hope this is of help to you...
Posted on Jul 12, 2010
Testimonial: "Hey thanks mike your a smart dude! I did notice however after draining the crank case and gear box of its old oil I refilled it with new oil... Anyway I put it in gear and and pulled in the clutch it was a little tough to move the rear wheel so does this mean i have a seized gear or the clutch just might need to be adjusted. I really was hoping it wasn't gonna be this problem its like the last thing i really wanna work on with this bike but i think this is prolly the problem..."
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