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95 yz125 wont start. has new gas/mix, new plug gapped at .023, and good spark. if someone can tell me what the compression should be that would really help. thanks
I didnt notice before, but no, the plugs really not wet after kicking it over 6 or 7 times. just today i pulled the carb. and cleaned it and the jets thouroghly. This all started when i was at the dunes, 4th gear, throttle pinned, the bike just sputtered and died. It hasn't started since no matter what i try. any help is GREATLY appreciated. ThanksI didnt notice before, but no, the plugs really not wet after kicking it over 6 or 7 times. just today i pulled the carb. and cleaned it and the jets thouroghly. This all started when i was at the dunes, 4th gear, throttle pinned, the bike just sputtered and died. It hasn't started since no matter what i try. any help is GREATLY appreciated. Thanks
I can't help with the compression question, but are you positive the fuel is making it through the carburator and into the cylinder. If you kick it over 5 or 6 times and then pull the plug is it really wet?I can't help with the compression question, but are you positive the fuel is making it through the carburator and into the cylinder. If you kick it over 5 or 6 times and then pull the plug is it really wet?
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Well you certainly have tried a great deal of things, your compression is fairly low, however I would expect it to fire all be it not run too well, initially I would suspect a couple of things, a massive air leak i.e. crankshaft seal leaking or has fallen out, or the flywheel key in the flywheel has sheared knocking the ignition timing way out.
You mean start? Try putting proper gas/oil mix in it. Check for spark by pulling spark plug, ground metal case to engine metal and pull start cord. Look for spark in the plug's gap. If it sparks, you have a carburetor problem. Most likely gummed up with old gas. Needs to be removed and cleaned or replaced.
Remove the spark plug and check for spark--it should be blue and snappy with a fresh plug gapped at 0.020". If nothing or weak, remove the left side engine case to expose the flywheel and ignition module. Check the module gap by inserting a thin business card into the pole gaps, turning the flywheel until the magnets are under the module. Loosen the module screws and allow the module poles to contact the magnets. Tighten the screws and rotate the flywheel somewhat to release the card. Remove the stop switch wire from the body of the module and try for spark again. If still nothing, replace the module using the above procedure to install. If the first test produced good spark, then pour a little fuel mix into the plug hole and try for start--it should pop several times. If so, then pursue fuel delivery problems--check the fuel filter, air cleaner, and muffler for plugging. check the fuel lines for decay or other problems. Make sure that you have fresh fuel mix in the tank. Hope some of this helps!
Make sure the muffler has not become plugged. Check the flywheel key as it may have sheared off for some reason causing the timing to be off, yet still generate sparks. Are the sparks blue and snappy? If not, check the ignition module gap to the flywheel magnets--use a thin business card for a gauge. A wide gap can cause weak spark. Hope this gets you running again!
hi
if you have a good compression,a strong enough blue spark and carburetion for the fuel air mixture try priming the engine(put small amount of gas in the spark plug hole)then start the engine.If the engine runs only the gas you put inside the cilinder there is a carburetion problem to find and fix.
let me know regards savumihai71
Do you have fresh gas? If so is the mix right? If you can get to the carb easy spray some carb and choke cleaner in it. Check the gap on the new spark plug. The gap should be located somewhere in the manual. The big problem is making sure that the mix is right. To much oil in gas will foul plug smoke like crazy and foul the plug and hard to start. Not enough oil and you can seize it up.
Are you using mixed gas? The gas needs to be mixed 50:1 You will have to use 2 cycle oil. If you are using mixed gas, than you can buy a cooler spark plug. Sounds like the spark plug is not properly gapped.
I didnt notice before, but no, the plugs really not wet after kicking it over 6 or 7 times. just today i pulled the carb. and cleaned it and the jets thouroghly. This all started when i was at the dunes, 4th gear, throttle pinned, the bike just sputtered and died. It hasn't started since no matter what i try. any help is GREATLY appreciated. Thanks
I can't help with the compression question, but are you positive the fuel is making it through the carburator and into the cylinder. If you kick it over 5 or 6 times and then pull the plug is it really wet?
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