1999 300 fuel problem please advise

Makj44 · November 19

Hello I have a 1999 Honda 300 4w/drive and I just replaced the Oem carburetor with a aftermarket carburetor after installing the carb on the bike it started great and idled like new one but when I shifted into first gear and tried to move forward it died, I shifted back In neutral and the wheeler started easy again I let it set there to see if maybe it needed to warm up but when I shifted into first and tried accelerating it died again, I am not a use to working on it and would appreciate any advise thanks

**Mech** · November 19

If it died right out, as soon as the bike moved, then I'd be suspecting an electrical problem..

But I'd probably try adjusting/checking the idle mixture setting first in case it is that simple.. I wouldn't pull a carb off though till I'd discounted the electrical problem as a cause. Which could be done by attaching a timing light and watching the flash as you tried to move forwards. If the flashing stopped before the engine stopped rotating, then it is an electrical problem.

**Gwbarm** · November 19

Could be electrical connect disturbed by putting carb in and out, but i suspect the new aftermarket is too lean, never had one do as you describe, usually they just stumble a little on accelaeration and then catch up, and always idle perfectly. The question i might have is did it do this before replacing carb, or why was carb replaced.

**Mech** · November 19

Definitely look for any electrical problem right around the carb area if it does seem likely to be electrical.. Probably/possibly bumped some chafed wire while working on the carb.

As Gw says, they mostly stumble and carry on but not till they get moving, and they don't normally die right out..

Makj44 · Friday at 02:10 AM

Thank y’all for the help with my problem, I ended up adjusting the air / fuel mixture and it took me a couple of times but is running better then it has in a long time.