if it's a fuel issue, it won't be the jetting since the bike ran well prior. it would have to be something really went bad in the carb, ripped rubber diaphragm, extremely leaky coaster enrichener, I would think something quite obvious. If it's pump related, tested on a battery only, shows the pump working or not. The circuitry of the pump goes thru the relay and the ignition module, if something were up with either one of those, then the pump would not turn on.

power to the relay which turns on the pump starts at the fuse block of R/w goes thru kill switch comes out R/B (looks like a "B" ) R/B goes thru relay coil exits out as L/R and goes right to ignition module, somewhere in there (ignition module) it has to reach ground,or the relay coil will not energize and therefore no 12v would get to the pump. L/B would have the 12v positive to pump.

Now, as far as the pump, does it always stay on? or is there an internal pressure switch to interrupt the 12v to turn it on/off?? I don't know.

So as far as the fuel flow and the pump doing what it needs to do, it could be anyone of those 3 that could cause the pump not to work on the bike. And there is no way to test that I know of, other than to swap each one with a good known one.

If you are using a Dyna3k, I know there had been issues with fuel pump failure. I don't know if it was an out of the box failure or a gradual fail. But this is also going back more than 5yrs ago.

aj, have you run a tube straight from your tank to your carb and tried to start your bike that way? Kai

do i need to clean the needle, nozzle, throttle valve, etc? why does it seem my throttle valve looks more rectangular like the older parts list (2004 for example)rather than round like the 2007 parts diagram shows? Are the 2 carbs the same?

ajbonner wrote:
do i need to clean the needle, nozzle, throttle valve, etc? why does it seem my throttle valve looks more rectangular like the older parts list (2004 for example)rather than round like the 2007 parts diagram shows? Are the 2 carbs the same?

Don't mess(blast out) with anything other then the 3 jets in the bowl. As long as the cleaner is getting from one end to the other, your done there.
What did you find out about the battery?

So I am just noticing that my starter jet is completely plugged. It doesn't even look like it has a hole through it. What do I use to open it up? Could this have been my problem?

ajbonner wrote:
So I am just noticing that my starter jet is completely plugged. It doesn't even look like it has a hole through it. What do I use to open it up? Could this have been my problem?

Did you remove the starter jet and look through it, or is it still in the carb. Curts has said something in the past about it being blocked off, but the jet has a size according to Mikuni. The opening may show up when the bike is running, and the enricher is on. Maybe he will show up and mention something.

Hows that battery?

Kai_Sayson wrote:
aj, have you run a tube straight from your tank to your carb and tried to start your bike that way? Kai

I've asked this question three times and yet to be answered!!!! Good luck on finding and fixing your issue. Always look at the most simple thing...Keep IT Simple!!!! Method!!!! Later

Kaidallac wrote:
Kai_Sayson wrote:
aj, have you run a tube straight from your tank to your carb and tried to start your bike that way? Kai

I've asked this question three times and yet to be answered!!!! Good luck on finding and fixing your issue. Always look at the most simple thing...Keep IT Simple!!!! Method!!!! Later

Kai I appreciate your help. My carb is torn apart now and can't do what you recommend. When I button it back up if it is still giving me problems that will be the first thing I try. Didn't mean to ignore your posts.

does the black flex line go on the length of fuel line closest to the carb. took it off and forgot.

also any tricks to proper routing of the fuel line to avoid rubbing/wearing on the wires?


and finally, the choke cable has swivelled and rotated quite a bit during my work. do i need to take apart and adjust anything?

The starter jet is nothing but a plug on certain year bikes. So don't worry about not being able to see thru it. The web doesn't really matter so don't worry about it but just an FYI I bent my metal line so it went directly thru the middle between the jugs so it wouldn't get so hot. I will warn ya now it is hard to bend.