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Discussion Starter #1
Hello,
New to this forum, I'm reaching out for assistance with a 2010 yfz450x bike. The atv cranks and tries to start but won't kick over. I replaced the wiring harness, starter, starter relay, spark plug coil and spark plug, stator, used CDI, rectifier, fuel pump and fuel injector. I received the atv with damaged parts. I turn the key and switch to run, I can hear the fuel pump priming, still no kick over. Once I turn the key, I see on the indicator there are no error symbols, However, when i try to start the bike, I see an engine light pop up. Any ideas I can check? I'm somewhat leaning to another CDI box, the original one i had was fried.
 

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Is it clicking when you try to start it or just not doing anything at all? Have you tried to turn the motor by hand to see if it turns over fine?
 

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Discussion Starter #3
The starter relay clicks when I try to turn, it seems its trying to fire but it won't. After many attempts, I noticed the positive terminal cable is warm, the starter is warm and the starter relay is warm. I have not tried to turn the motor over by hand, I will try that. Thanks.
 

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Discussion Starter #4
question, i never messed with a fuel injector atv, for this atv i have, there is no petcock. Just wanted to check if i'm good with that?
 

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Yeah, the fuel comes out of the fuel pump (top backside of the fuel tank). There is no petcock.
 

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Discussion Starter #6
ok thanks, just wanted to double check, im able to turn the motor by hand, I'm going to check the piston, head a little knock when I tried to crank it.
 
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