Hey guys, very strange situation going on and I need your wisdom.

I noticed recently that my front tire was super lumpy and there is some dry rot on it so I've not ridden the bike in about a week. I went outside to start it the other day and ended up killing the battery because she wouldn't start. It was freezing out so I figured I was just having a cold start issue.

Today I charged her up and went to start her again, cranking sounded fine. I pulled the fuel line and the gas poured out just fine so I knew gas was getting to the carb. I pulled the air cleaner off to see if it was getting from the carb to the engine. No dice. When twisting the throttle no gas was making it's way into the carb mouth.

Upon closer inspection I noticed something odd about the position of this black rubber piece. I remember adjusting this screw when I was getting that deceleration popping, and I remember there was a gap between the two, as my adjustments would either increase or decrease the space between...but there was always SOME space between.



Here's the interesting part. If I push the bottom (the part that looks wet) of this black rubber piece toward the engine, gas shoots into the carb mouth when I release it. I don't know why this piece is not being held back like it usually is, and if anyone has any ideas I could really use some help.

Also noteworthy, when I twist the throttle it DOES indeed pull the cable, and the unit on the right of the carburetor does twist, so I'm assuming something is no longer connected. What I don't know is how it could have come undone, the bike has been sitting for the past week in my parking lot, and this seems an awfully strange thing for the average person to consider vandalizing lol.

Please help me get my bike started before the snow comes!

The two don't touch. It has to do with the duration of the accel assist. Leave the nut on top of the arm, and the screw about 2 1/2 turns off the nut, then snug the nut.
Remove the air cleaner and look in the carb throat when twisting the throttle. It should squirt out the end of the horizontal brass tube.

Don't mess with the throttle when starting the bike cold.
Pull the enricher completely out(it should stay there).
Turn the key on.
Push the start button.......don't mess with the throttle.

The bike should Start with a high smooth idle........don't mess with the throttle.
After about 10 secs or so depending on temps, the idle will get a bit lumpy......don't mess with the throttle.
Ease the enricher in a bit, about half.(it should stay there)....don't mess with the throttle.
Leave the enricher about half out, until the bike runs well enough without the enricher at stops. Depending on temps, this could be minutes or miles.

The enricher uses the vacuum to operate properly. If you roll the throttle, the throttle plate in the throat opens, and the vacuum is gone. With the vacuum gone, the enricher stops supplying fuel. It is not a choke.

It sounds like that linkage may just be stuck. Clean with some carb spray or brake cleaner spray then lube with a good spray lube. Twist it by hand until it frees up. Also check to make sure the Acc pump rod is returning to the upward position and not stuck in the down position.

SKWEARpeg wrote:

Remove the air cleaner and look in the carb throat when twisting the throttle. It should squirt out the end of the horizontal brass tube.

I appreciate your willingness to help me with my problem. However, in the initial post I mentioned that I'm aware that there should be a gap, and that I removed the air cleaner and when I twist the throttle it doesn't squirt any gas. The post was made to discover what I can do to fix that. The rest of the starting process is clear enough, though I can't run the bike anywhere at idle because when I twist the throttle it gets no gas.

It sounds like that linkage may just be stuck. Clean with some carb spray or brake cleaner spray then lube with a good spray lube. Twist it by hand until it frees up. Also check to make sure the Acc pump rod is returning to the upward position and not stuck in the down position.

The thing is, that black piece seems to have the opposite problem. I think it needs to be stuck, or held back in some way, as typically it requires that the throttle cable be pulled in order to "unstick" it from it's position. I'm not sure what to clean, but it does seem like this is an accelerator pump issue. I've never had this problem before so I'm a little lost on what exactly to clean or look at.

If you remove your air cleaner and twist your throttle, you'll see the movement I'm talking about.

EDIT: I should also mention though, that while I was able to get the bike to idle briefly, it eventually died out and I didn't bother to try to start it again because I can't give it any gas to ride it to a garage.

Clean and lube the black pc on the pivot point. It is a acc pump issue. reach in and push down on the acc pump piston plunger shaft. It should push down, squirt fuel from the little brass nozzle in the carb throat and return to the upward position by itself when you let go of it. If it don't push down then there is the problem. It is either stuck in the upward position or it is stuck in the down position and not returning upward. In either case it will need to be removed and fixed.

Is it still below freezing where you are?

Agreed on the accelerator pump issue. I took a closer look with a flashlight and it seems to be a problem of the accelerator pump not returning back to the full upright position after pushing it down. Because of this, that black rubber piece is remaining in contact with the screw. It is the pressure on the opposite end of that piece (by the accelerator pump) that would otherwise maintain that gap. I'm not sure exactly how to go about cleaning it, but it does seem to have a hex nut at the base of the pump, so perhaps loosening that is the right place to begin.

EDIT: Also, no it is not still below freezing where I am. I also was able to get the bike to idle just fine, though it took some doing. It will idle smoothly with no enricher. If I even pull the slightest bit on the enricher tab, it will die. If I touch the throttle at all, it will die. Clearly there are no problems in the pilot circuit which is one thing off the list. As for why the throttle and enricher are killing the bike, I'm not exactly certain, but that accelerator pump is definitely sticking.

Hey guys, so I got it figured out. Not fixed, but I know what's wrong. Check out this photo below



My hand is holding the circular section where the throttle attaches, and this circular section attaches to another arm which has a similar rivet with wire holding it on. That section is where the problem lies. The black rubber piece just below that arm extension is in front of a spring which actuates that portion of the assembly. However, something is wrong with that section in that it doesn't move with the circular assembly as it should, the arm moves but that riveted section on the left stays put.

What I did was use speed wire to keep the riveted section on the left attached to the arm assembly, and force it's movement. I don't think it's fixed, but I think it'll give me some motion and potentially enough to be able to ride the bike to the shop for winter storage.

If anyone has seen something like this before, or has any additional information that may be helpful, I'm all ears.

That thing is a dirty nasty mess!!! clean it and spray some penetrating lube on it. Then move anything that will and is supposed to move by hand until it is freed up.

BTW the hex nut at the base of the ACC pump is to remove the pump piston and parts (spring) from the carb

davej wrote:
That thing is a dirty nasty mess!!! clean it and spray some penetrating lube on it. Then move anything that will and is supposed to move by hand until it is freed up.

BTW the hex nut at the base of the ACC pump is to remove the pump piston and parts (spring) from the carb

My dog poops better looking stuff than that thing.

No wonder it has issues.