1999 YFM350 Big Bear. I replaced the carb & intake tube (new spark plug and fuel cock), because it was extremely hard to start, even sometimes with ether. Same issue. Then I found out about Valve Clearance. I attempted to adjust both intake and exhaust, but missed the step of Top Dead Center. (I now have the Service Manuel)
Started and ran. Plenty of power, but severe lifter chatter. I then discovered the step I missed.
Went back and carefully set the clearance, would start and run, but only after a small shot of ether. I could stop and restart it several times, until it warmed up, (hot exhaust pipe). After that, It won’t restart. Today after sitting about 4 hours, I again attempted to start, without ether, it would not. Choke or no choke, with little to full throttle. Last time I compression tested it was about 120 psi. (less than 10 hours ago, running time)
Does someone have a solution to my issue?
After spending hours reading almost everything slightly related, on this site, I thought about a new plug. Someone had suggested Iridium. No one in town had one, but for $7 I found an E3.36 DiamondFire. I put that in, and change nothing else and fired right up and ran nice. Ran it over a half hour with many restarts without fail. I hope and pray the issue is resolved. Next a new battery, so I can put this one back in my Kodiak.