CB400A 1978 Carburator and Idle
Posted: Thu Apr 10, 2008 9:14 am
I noticed a few of you are in the WA, and I am looking for a "mentor" of sorts to help me learn what I need to maintain a bike properly. Got my endorsement, but it is no good without good maintenance of the bike.
I recently got my hands a 1978 CB400A that has been sitting for years. I got it up and running, changed tires, fixed some wiring issues and changed the battery. Now I am running into an issue. It seemed that the throttle stuck one day when running a 6-8 mile jaunt. The handle itself did not, but when I shifted out or gear, it went into a high idle and started overflowing the fuel through the carburator overflow.
I pulled the carb and cleaned it, check the float arms and then changed the seals and put it all back together. I did some practice runs around the area and messed with the idle knob to make sure it did not die when in first gear at a stop. All seemed to be back in order.
Well, made that trip again and got to the place I was going and found it locking into a high idle again without the actuall throttle sticking. I reached down and adjusted the idle and it died. I noticed I was overflowing fuel again. I shut off the gas valve and parked it, and will have to ride it home tonight, at least it is only 6-7 miles, but last time it ran through 90% of a tank of gas and the reserve.
Any help is appreciated. Anyone hobbists in northwest WA, USA, or southern BC, Canada, feel free to arrange to come by and take a look. I have the Clymer manual, I just need the right direction here.
I recently got my hands a 1978 CB400A that has been sitting for years. I got it up and running, changed tires, fixed some wiring issues and changed the battery. Now I am running into an issue. It seemed that the throttle stuck one day when running a 6-8 mile jaunt. The handle itself did not, but when I shifted out or gear, it went into a high idle and started overflowing the fuel through the carburator overflow.
I pulled the carb and cleaned it, check the float arms and then changed the seals and put it all back together. I did some practice runs around the area and messed with the idle knob to make sure it did not die when in first gear at a stop. All seemed to be back in order.
Well, made that trip again and got to the place I was going and found it locking into a high idle again without the actuall throttle sticking. I reached down and adjusted the idle and it died. I noticed I was overflowing fuel again. I shut off the gas valve and parked it, and will have to ride it home tonight, at least it is only 6-7 miles, but last time it ran through 90% of a tank of gas and the reserve.
Any help is appreciated. Anyone hobbists in northwest WA, USA, or southern BC, Canada, feel free to arrange to come by and take a look. I have the Clymer manual, I just need the right direction here.
I recently got my hands a 1978 CB400A that has been sitting for years. I got it up and running, changed tires, fixed some wiring issues and changed the battery. Now I am running into an issue. It seemed that the throttle stuck one day when running a 6-8 mile jaunt. The handle itself did not, but when I shifted out or gear, it went into a high idle and started overflowing the fuel through the carburator overflow.
I pulled the carb and cleaned it, check the float arms and then changed the seals and put it all back together. I did some practice runs around the area and messed with the idle knob to make sure it did not die when in first gear at a stop. All seemed to be back in order.
Well, made that trip again and got to the place I was going and found it locking into a high idle again without the actuall throttle sticking. I reached down and adjusted the idle and it died. I noticed I was overflowing fuel again. I shut off the gas valve and parked it, and will have to ride it home tonight, at least it is only 6-7 miles, but last time it ran through 90% of a tank of gas and the reserve.
Any help is appreciated. Anyone hobbists in northwest WA, USA, or southern BC, Canada, feel free to arrange to come by and take a look. I have the Clymer manual, I just need the right direction here.
I recently got my hands a 1978 CB400A that has been sitting for years. I got it up and running, changed tires, fixed some wiring issues and changed the battery. Now I am running into an issue. It seemed that the throttle stuck one day when running a 6-8 mile jaunt. The handle itself did not, but when I shifted out or gear, it went into a high idle and started overflowing the fuel through the carburator overflow.
I pulled the carb and cleaned it, check the float arms and then changed the seals and put it all back together. I did some practice runs around the area and messed with the idle knob to make sure it did not die when in first gear at a stop. All seemed to be back in order.
Well, made that trip again and got to the place I was going and found it locking into a high idle again without the actuall throttle sticking. I reached down and adjusted the idle and it died. I noticed I was overflowing fuel again. I shut off the gas valve and parked it, and will have to ride it home tonight, at least it is only 6-7 miles, but last time it ran through 90% of a tank of gas and the reserve.
Any help is appreciated. Anyone hobbists in northwest WA, USA, or southern BC, Canada, feel free to arrange to come by and take a look. I have the Clymer manual, I just need the right direction here.