Motorcycles, Snowmobiles, Go-Carts, ATV's and Golf Carts - Honda CRF250R...trouble!

I have an 05 crf250r, and for some reason it does not want to kick-start. If I roll it down a hill and pop the clutch it starts right up, and runs okay. Something else I noticed. Now when I try to kick-start it, it likes to back fire, and it has even shot a flame out the muffler. I would say out of 50 tries it may start once, but I have to keep the throttle open a little or it will die out. Just some history on this bike. It has always had trouble idling, but I never bothered to adjust it because it was never a real issue. It never gave me this kind of trouble starting though, and I have replaced the spark-plug. Help, please!

1against:

A few possibilites:

Low compression due to bad or poorly seated exhaust valve. This could give you hard starting, idle problems, and the back firing you've described. You can run a compression check for this.

The other is an overly rich mixture in the idle circuit. This could account for the poor idle, hard starting (semi flooded condition), and the backfiring. The back firing would occur when raw gas from the rich mixture would pass the exhaust valve to be ignited in the exhaust system. Try adjusting the metering screw for this.

The last would be late timing.

Hope this helps,

Bob

I will try what you said. I hope one of the three things gets it, either way...thanks.

What exactly is the metering screw? I don't completely understand your terminology. Thank you for the help, talk later...bye.