Feedback Score: 0 reviews
Join Date: Jan 2011
Location: Central Illinois U.S.A.
Thanked 249 Times in 244 Posts
Based on the size relative to your finger, my guess would be it came off the RH end of the choke shaft. Look there and let me know if I guessed right.
As to the problem of leaking gas into the air cleaner - it almost has to be the float needle and seat causing the problem. The needle seat is not replaceable, but the needle is. I use a wad of steel wool packed into the needle seat and turn it with a small flat blade screwdriver, to polish the seat. Corrosion on the needle might be the cause, but if the needle is corroded, it's best replaced than repaired.
Note: Honda puts a shut-off on the fuel so you can shut it off. It should be shut off when done riding. I have developed a habit of shutting mine off every time I stop to take a break or whatever. I also drain my carb at the end of each day to prevent the carb from gumming up when setting unused. I race and although an injury kept me off my ride from Oct. 2008 to May of 2010, when I was ready to ride again, all I had to do was put fresh gas in the tank, turn it on and start the engine. I haven't cleaned or had to rebuild a carb on one of my own machines since 1978. I haven't even had the carb off my 04 CRF.