[trommy]

I tipped over my 400 foreman,at low speed,and shortly afterward it began to miss and loose power;spitting and backfiring.Then it was very hard to start and soon would not start unless I squirted some gass into the carb.I dissambled and cleaned the carb twice but it will not start without injecting gas into the venturi.It acts like it's starving for gas but the gas flows freely to (and through) the carb.Any ideas??huh?(I'm going out to check the wiring.)Thanks

 

[trommy]

FYI:The float valve was jammed open shortly after I righted the bike.

 

[trommy]

It's not getting gas.It will start if I hold my hand over the carb mouth but dies seconds after I remove my hand.Sounds like the low speed jet is plugged but I passed a 'twist-tie' wire through that jet earlier just to be sure.I guess I'll have to clean the carb again.

 

[Helmut]

Did you clean the passageways inside the carb body or just the jets? It don't take much to get into those passageways and stop it up.

 

[trommy]

Thanks.I just gave it a 3rd cleaning. The gas is clean but it barely started and immediately began spitting and sputtering as before.It's 85* here but would not start without the choke.What makes the needle move up and down in this carb??The throttle doesn't move it.Does it work from vaccuum?Thanks again.

 

[trommy]

I just read your reply about the vaccuum float/needle.I'm going out to check that.

 

[Helmut]

Yeah, the vacuum piston in the top of the carb is what moves the needle up and down when you accelerate.

 

[trommy]

I cleaned that carb again.It's still the same.I checked the rubber piston and it seems normal.If I put gas into the carb,it runs normally until that gas is used up.I'm wondering if the rubber manifold to the engine could have cracked when the bike tipped over from the weight of the carb.??I'm stumped.I
It'll have to wait 'till tomorrow.Thanks

 

[Helmut]

I cleaned that carb again.It's still the same.I checked the rubber piston and it seems normal.If I put gas into the carb,it runs normally until that gas is used up.I'm wondering if the rubber manifold to the engine could have cracked when the bike tipped over from the weight of the carb.??I'm stumped.I
It'll have to wait 'till tomorrow.Thanks

That might be the problem. Either the carb is stopped up or it isn't drawing gas from the carb and a crack in the boot could cause that if it's bad enough.

 

[trommy]

Thanks.I'll let you know how it turns out

 

[jgar]

I would check the boot carefully. BTW I know of some great places to ride in Shelburne if you are from Southern N.S.