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    Junior Member colo's Avatar
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    Aug 2008
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    Red face $10 for the person to figure out the problem

    Sorry for the long post.

    Bike: 2004 Yamaha R6, 33xx miles.

    Problem- Wont hardly start and stay running.

    Story- The bike is a track bike, and I had a little lowside at IMI last week. The bike slide across the track, caught the grass, and did a slow roll onto the other side. So I walk over to the bike, pick it up, put it in N and start it. I ride it over to my trailer and load it up. No problems. Nothing major was broke/bent.
    Take it home, ride it for a couple of laps around the block, back into the garage and look at it a little closer and notice that I got some dirt in/under the gas cap area. So, I take the gas tank off, drain it, remove the fuel pump, and clean the whole inside. I cleaned off the fuel filter too. I took the gas filler cap off and clean that whole area as well. Got it all nice and clean.
    Put the tank back on the bike. Connected it correctly. Filled with some new gas, and tried to start it. Fuel pump primes, cranks for a bit, and no start. So I take the tank back off, take the pump back out to make sure it is good. It checks out fine. Put it back on and same thing.

    -I remove the fuel line from the fuel rail, and prime the pump and it puts out plenty of fuel.

    -I removed the air box and look down into the engine while cranking to make sure the injectors are putting gas into the engine. They are. (*see note below.)

    -I checked for spark. I removed plug number 2, ground it out and it is getting tons of juice. Also removed plug 3. Cleaned both while I had them out.

    -Bike wants to start and does. It only starts if, while cranking, I open and close the throttle repeatedly. When it does start it only runs for less then 5 seconds and no higher then 700 rpm. It is not the idle speed being to low. If I give it any gas while running, it just dies. No back-fires.

    *The injectors' pattern is not a mist. It is more like forcefull droplets. But if I look right above the intake valves, there is a nice fuel fog. Also, all the injectors have the exact same pattern. So I do not think they are clogged. It just seems odd to my that, all the injectors, would have the exact same, clogged pattern.

    I just want to get some advice before I start throwing parts/money at it.

    Thanks for any help,

    Tyler B.
    Last edited by colo; Tue Sep 23rd, 2008 at 07:50 PM.

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