Questioni have a 2005 honda crf 80cc, and i bought it off of my friend about a week ago, and its been running fine, and then i tried to start it, and it did, but it didnt sound right, and then i put in first, and it rode a little, but not right. then it just wouldn't start.
AnswerNick, I would clean the fuel tank and carburetor out first, refilling with fresh fuel.
Pull the spark plug out and see if it looks wet/dry/black/sooty/oily. That will give clues about what is happening inside the cylinder. Check for a good spark. If the plug is dirty, you might not see the spark so always check with a fresh or known good plug.
No spark can mean several things..... KILL SWITCH ON/OFF, pulse generator failure, CDI module box failure, ignition switch grounding internally.
http://www.bikebandit.com/houseofmotorcycles/2005-honda-motorcycle-crf80f/o/m228... for illustrations of the parts involved.
If the carburetor idle jet is plugged up, the bike will not start/start easily. You may have to remove the carburetor and clean the jets and float bowl.
Check valve clearances to ensure that there is .002" on intake/exhaust valves checked COLD on the compression stroke.
A running engine needs compression, fuel, air, spark to make it go... find the missing element.
Bill Silver
