need advice on rmz 450

danielrmx 450 2008
Edited Date/Time 2/9/2014 4:02pm
My rmz 450 will fire the best but run for a couple of sconds then shuts off I have replaced the following

Wiring loom, stator, c
Bike starts up when cold no problem,would this be a sensor maybe ckp sensor, toor tp sensor or could it be the fuel supply, thanks
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Paw Paw 271
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Paw Paw 271 1/28/2014 4:07pm
1/28/2014 4:07pm
What year unit? EFI or carb?
xnationalwrench 1/28/2014 7:48pm
1/28/2014 7:48pm
Check the fuel pump for blockage and then out put/

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silver753
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silver753 1/28/2014 9:34pm
1/28/2014 9:34pm
Doesn't sound mechanical, and if you've replaced all the electrical, it's probably in your EFI. If you have the skills and basic tools, you can put the seat and tank, the drain the tank and remove the fuel pump. You can take the pump apart (although difficult on most) and look at where the power (wires) goes into the unit. Take a 12v battery and take some wires and connect to the leads, and this will show you if the pump works or not. If it's good you will hear a very slight humming noise.

If the pump is good, go one step further and take the throttle body (previously called a carb) off and disassemble and clean. If you are scared, go to youtube and watch a few videos. If it looks too hard, take it to a dealer and pay them to do it.

Good luck!
danielrmx 450 2008 2/1/2014 7:08am
2/1/2014 7:08am
silver753 wrote:
Doesn't sound mechanical, and if you've replaced all the electrical, it's probably in your EFI. If you have the skills and basic tools, you can put...
Doesn't sound mechanical, and if you've replaced all the electrical, it's probably in your EFI. If you have the skills and basic tools, you can put the seat and tank, the drain the tank and remove the fuel pump. You can take the pump apart (although difficult on most) and look at where the power (wires) goes into the unit. Take a 12v battery and take some wires and connect to the leads, and this will show you if the pump works or not. If it's good you will hear a very slight humming noise.

If the pump is good, go one step further and take the throttle body (previously called a carb) off and disassemble and clean. If you are scared, go to youtube and watch a few videos. If it looks too hard, take it to a dealer and pay them to do it.

Good luck!
Fuel pump is making noise, took efi (carb) cleaned with petrol and blew through every hole with a air line, problem still exist
TrailDigger 2/1/2014 8:28pm
2/1/2014 8:28pm
You could check all connections. I'm thinking it's one of the sensors.
xnationalwrench 2/2/2014 4:31am
2/2/2014 4:31am Edited Date/Time 2/2/2014 4:31am
danielrmx 450 2008 wrote:
Fuel pump is making noise, took efi (carb) cleaned with petrol and blew through every hole with a air line, problem still exist
Just because its making noise doesn't mean its pumping fuel or the right amount, check what the output is supposed to be and what you are getting. Have you checked the fuel injector for any blockage?
Paw Paw 271
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Paw Paw 271 2/4/2014 3:34am
2/4/2014 3:34am
Check for a plugged fuel tank vent cap.

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onenastynotch
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onenastynotch 2/9/2014 4:02pm
2/9/2014 4:02pm
Wires coming out of start capacitor under throttle body are know ton break ....check wires where they come out of capacitor..".....common issue

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