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Discussion Starter #1
im a noob when it comes to troubleshooting bikes heres what i got tho

2004 cbr600rr
9300 miles
full yoshi rs-5 exhaust
pcIII-usb
k&n air filter

i took the bike apart to clean the air filter and change the plugs and after i got that all done and put together it cranks/turns over but wont start... ive searched this topic on here and cant find any solutions ive checked fuses and relays and they're all good fuel pump doesnt prime but i have spark can someone help me

p.s. i just bought this bike less than a month ago and it was running way rich because the dummy i bought it from didnt know how to install a map on the PC it was idling shitty and would occasionally die while downshifting

any help would be appreciated
 

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The tilt sensor can cause this. If the sensor is installed upside down or is unplugged it will kill the fuel pump but maintain spark. Other than that just double check all the wiring and make sure nothing came loose.


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Discussion Starter #3
where is the tilt sensor located? ive checked everything twice and i really dont wanna have to take it to the dealership but am at that point

like i said im a noob at this
 

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Discussion Starter #4
Just got done taking the plugs out thinking that I did something wrong and now there's no spark!!! I'm lost
 

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double triple check all the wiring with the pc3. i got a used bike and the wiring was total crap. be sure all the connections are solid. if there was crimping/soldering make sure it was done well. also be sure the pc3 is ground on the battery.
 

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Take it easy man, no need to take it to the dealer if you don't have to. Since you don't have spark now check the connections to the coils, make sure the computer is plugged in good. Look at all the pins while it's apart and make sure none of them are bent or corroded. When troubleshooting don't assume anything, check everything. It pays off trust me, I do it for a living. The crankshaft position sensor is the unit that delivers the spark signal. It is located under the right side engine cover (clutch cover). Follow the wires and make sure the connector is plugged in good, it should be under the gas tank somewhere.

And again try to look at the WIRING. It is very cheap if it gets hot or pinched it will break. My bike got bumped by a car and it broke some wires under the fairing. I had to cut the harness open to even find them. The harness looked perfect on the outside.


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Discussion Starter #8
i figured it out guys thanks the crankshaft position sensor came unplugged when i took the tank out i reconnected it and it runs great but im having an issue with my fuel gauge it keeps blinking like its on reserve but it has a full tank... any thoughts?
 
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