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Discussion Starter · #1 ·
Greetings,
I am looking for help with my bike. I have used this forum in the past for a number of repairs and maintenance and found it to be extremely helpful. I have not ridden this bike much over the past year and want to get it running again.
2004 1300 C with 80,000 miles.
Stock jets with Cobra Slip ones.

The bike was not running well so I pulled the carburetor to clean it and change the rubber gaskets. I did this according to Mr. VTX’s write up. I also changed the gaskets in the pet “thing.” I have not been able to get it running decent since.

It looks like I am not getting gas from the accelerator pump. It does not shoot any gas into the carb when I twist the throttle. I took it apart again and wanted to make sure the brass rod that goes into the chamber was not clogged. Is that supposed to be clear? It was blocked and I was finally about to get something through it. I put everything back together and it is still not shooting any gas when I twist the throttle. I pulled the accelerator cap and checked the rubber gasket and made sure the holes were clear in the cap. And till nothing.

I also checked the vacuum diaphragm and did not see any holes in it.
I have checked the ecm wires for breaks.

Am I over looking something obvious?

I would appreciate any help.
Thanks in advance.
Clint
 

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A ball check valve allows fuel into accelerator pump.
When throttle twisted the ball check valve blocks
the intake port and forces the fuel to the discharge port
to spray a shot of fuel into the carb throat.

You can spray cleaner into the ports and verify the port to to the tube in the
carb throat.
 

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Discussion Starter · #4 ·
A ball check valve allows fuel into accelerator pump.
When throttle twisted the ball check valve blocks
the intake port and forces the fuel to the discharge port
to spray a shot of fuel into the carb throat.

You can spray cleaner into the ports and verify the port to to the tube in the
carb throat.
Hans & Feet,
First, thank you for taking the time to respond.

I pulled the accelerator cap off and used a small wire to make sure the two ports were clear and they were both clear. I also was able to get the discharge port clear. Would that mean there could be something wrong with that ball check valve? Also, when I had the cap off I looked and did not see any holes in the rubble valve.

Maybe replace the accelerator pump?

Thanks again.
Clint
 

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Loosen the cap to the accelerator, verify fuel is in there.
Tighten screws. Manually push the accelerator rod down.
See what happens.
 

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Discussion Starter · #6 ·
Checked both. Gas is flowing and there is movement from the accelerator rod.
Not sure what else to check. Maybe there is something wrong with the accelerator rod seal and I can’t see it? Or the cap?
Clint
 

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Discussion Starter · #7 ·
Could it be a bad throttle position sensor?
Clint
 

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Throttle Position Sensor controls Ignition Timing advance.

Last year someone posted they purchased Fuel Cutoff Valve from Allballs.
I did not know allballs had that . A carb rebuild kit for $38
26-1627 is the kit.

Accelerator pump is part of the float bowl.
Remove it , pour gas in the bowl, push the pump rod down, what happens??
Watch out for gas possibly spraying into your face.
Have you tried spraying carb cleaner into the port that goes to the spray pipe??
Follow the port to the spray pipe,give it a shot of cleaner.
if nothing comes open the throttle butterfly and shoot spray into the spray bar.
It should come out at a port at the accelerator pump area.
Diaphragm deterioration may have clogged the spray pipe...
 

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Discussion Starter · #9 ·
Thanks again for staying with me in this.

I changed the diaphragm in the pet thing and tested it for gas flow, that was good.
When I had the carb apart I used the rebuild kit. I also had a friend soak and clean the carb body when I had it all apart.
I did see a video on how to test the accelerator pump based upon what you described. I think that is my next step. And you may be correct about the diaphragm being bad as it is a 2004.

Again, I appreciate your help.
clint
 

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Or any other grit or object that could block the spray pipe..
 
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