MountainManDave
New Member
384 original miles, garage kept in overall great shape minus some frame rust. 100% stock with the exception of an in line fuel filter and a maintenance free battery. The inside of the tank is visibly perfect, no rust at all. It obviously sat for a long time two owners prior as they were a collector. Guy I bought it from claims it ran but had not ridden it in at least a year (although he did specifically state he drained the gas tank prior to letting it sit).
It will not start without holding the throttle really high, at about ¼ of a turn regardless of idle screw position. When it does start, it idles very rough, and dies as soon as I release the throttle. I stayed on the throttle and took it around the block to open it up just to make sure it didn’t need a “wake up” and it backfired a few times at high RPMs under load.
Additionally, the turn signals when turned on stay solid in the rear, and do not light up in the front.
So far I have tried:
1) Because of the turn signals I initially started by charging the battery (which looks newish but who knows) all the way up just to make sure it had enough juice.
2) I checked the spark plug, condition, it appears to be in pretty good shape.
3) Air filter appears to be clean and I did not observe any obstructions between air intake and carburetor.
4) I removed the carb and cleaned it out even though it was in pretty good shape already. I can tell by the marks that someone has been inside the carb before. I adjusted the float to 12.5mm as I read on another forum (this was only a minor adjustment to the original position as best I could tell). I set the the air/fuel mixture screw to shop manual recommended (screw in all the way, back out one and one half turns). Drained all old fuel and replace with new gas. No change in behavior. I went back after downloading the shop manual from this site, and it says the float level should be 22mm, adjusted, put it back together, now it does not even start, and if I give it gas to start like previous I can't kick start, it gets stuck, presumably from too much fuel in the cylinder. It also visibly looks wrong with this high a float level. So I obviously have conflicting sources of information on float height, and I’m not 100% on how I am measuring. All the diagrams I see with measure examples have round floats where you measure base of carb to top of float which is in the center since it's a circle. I have the flat bottom floats and I’m assuming I measure in the middle of the float edge, because the measurement would be higher or lower if I measured to inside or outside.
So first things first, can anyone confirm the float height, and that I am measuring correctly? The first picture below shows how silly the 22mm adjustment looks (to me anyway). The second shows where I am measuring to, you can see the smudged line from my dot which is in the middle of the float and my point of measurement.
I intend to check points next but want to rule out the fuel system first, and ensure I’m setting it back up correctly.
I am using the Honda Shop Manual as primary reference.
I also found this which matches up to the manual sometimes, but not always http://oldmanhonda.com/MC/DataTable.html
Thanks for reading my novel.
It will not start without holding the throttle really high, at about ¼ of a turn regardless of idle screw position. When it does start, it idles very rough, and dies as soon as I release the throttle. I stayed on the throttle and took it around the block to open it up just to make sure it didn’t need a “wake up” and it backfired a few times at high RPMs under load.
Additionally, the turn signals when turned on stay solid in the rear, and do not light up in the front.
So far I have tried:
1) Because of the turn signals I initially started by charging the battery (which looks newish but who knows) all the way up just to make sure it had enough juice.
2) I checked the spark plug, condition, it appears to be in pretty good shape.
3) Air filter appears to be clean and I did not observe any obstructions between air intake and carburetor.
4) I removed the carb and cleaned it out even though it was in pretty good shape already. I can tell by the marks that someone has been inside the carb before. I adjusted the float to 12.5mm as I read on another forum (this was only a minor adjustment to the original position as best I could tell). I set the the air/fuel mixture screw to shop manual recommended (screw in all the way, back out one and one half turns). Drained all old fuel and replace with new gas. No change in behavior. I went back after downloading the shop manual from this site, and it says the float level should be 22mm, adjusted, put it back together, now it does not even start, and if I give it gas to start like previous I can't kick start, it gets stuck, presumably from too much fuel in the cylinder. It also visibly looks wrong with this high a float level. So I obviously have conflicting sources of information on float height, and I’m not 100% on how I am measuring. All the diagrams I see with measure examples have round floats where you measure base of carb to top of float which is in the center since it's a circle. I have the flat bottom floats and I’m assuming I measure in the middle of the float edge, because the measurement would be higher or lower if I measured to inside or outside.
So first things first, can anyone confirm the float height, and that I am measuring correctly? The first picture below shows how silly the 22mm adjustment looks (to me anyway). The second shows where I am measuring to, you can see the smudged line from my dot which is in the middle of the float and my point of measurement.
I intend to check points next but want to rule out the fuel system first, and ensure I’m setting it back up correctly.
I am using the Honda Shop Manual as primary reference.
I also found this which matches up to the manual sometimes, but not always http://oldmanhonda.com/MC/DataTable.html
Thanks for reading my novel.