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Discussion Starter #1 (Edited)
Ok, I just got a 03 600rr with about 20,000 miles on it, bike is has stock exhaust, but a K&N filter. That's about all I know about the history of the bike.
So the bike when idling, it will sound like it will miss, so I ran the bike and checked my exhaust temps and when sitting on the bike from left to right the temps read 241-365-371-374, so I thought that the plug on the left side is fouled, because once I start driving it there is no more miss, runs really smooth. So last night I changed the plug on the most left cylinder started it up again and still did it, measured the temps again, same thing, so my next thought is that I have a weak coil and it gets good ignition when reved high but not when just idling. I have checked the connection and it seems good, any imput would be appreciated. Like I said this only does this at idle, I have no been able to check the temps when reved up but will do later, thanks in advance the the advice.
 

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The theory sounds good mate...

I would also check that the primary injector for that cylinder is ok if that doesn't pan out...

To check the coil just swap it with one on a different cylinder.
 

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Discussion Starter #3
yeah I'm going to swap it out with the other side and check temps again. Thanks for the reply, how do I check primary injector? Also that's the one that is not in the airbox right?
 

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Yep, not the one in the airbox, and easiest way to check is the same as the coil - swap it with another one...

just be careful with the orings, there can be a little fragile and if they don't seal right you could end up with fuel dripping onto a hot exhaust... not a good way to end the day IMO :)
 

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Discussion Starter #5
Thanks alot, will be trying this weekend. Thanks again for the reply. Will let you know what happens.
 

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Discussion Starter #7
Ok so I switched coils, and the original cylinder stayed at about 240, and the cylinder that I switched with was at about 250...so I think that I have a coil problem, however maybe an injector problem too like Nico says, the bike runs rich so wondering if there is a stuck open or closed primary injector? Will be looking into it later, anymore thoughts would be welcomed. I drives fine just misses a little when idling....so I'll keep driving it. Let me know if anymore thoughts.
 

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So hang on, now you have 2 cool cylinders?

I would be amazed if you have a dying coil AND a dying injector on one cylinder...
 

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And every time I see this thread in my subscription list I want to tell you that you will find your engine under the fuel tank... :)
 

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Discussion Starter #10
yes when i switched coils i had two cool cylinders. guess i don't know what you mean with the engine under the gas tank...whatever, i'll get it figured out.
 

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How long did you wait before remeasuring?

And the other bit was just a joke...
Problem: Engine missing
Soluting: Engine found under gas tank...

Sort of like the aeroplane joke:
Some random website said:
After every flight, Qantas Airlines pilots fill out a form called a gripe sheet, which conveys to the mechanics problems encountered with the aircraft during the flight that need repair or correction. The mechanics read and correct the problem, and then respond in writing on the lower half of the form what remedial action was taken, and the pilot reviews the gripe sheets before the next flight. Never let it be said that ground crews and engineers lack a sense of humor.

Here are some supposedly actual logged maintenance complaints and problems as submitted by Qantas pilots and the solution as recorded by Qantas maintenance engineers.

(P = The problem logged by the pilot.)
(S = The solution and action taken by the engineers.)

P: Left inside main tyre almost needs replacement.
S: Almost replaced left inside main tyre.

P: Test flight OK, except auto-land very rough.
S: Auto-land not installed on this aircraft.

P: Something loose in cockpit.
S: Something tightened in cockpit.

P: Dead bugs on windshield.
S: Live bugs on backorder.

P: Autopilot in altitude-hold mode produces a 200 feet per minute descent.
S: Cannot reproduce problem on ground.

P: Evidence of leak on right main landing gear.
S: Evidence removed.

P: DME volume unbelievably loud.
S: DME volume set to more believable level.

P: Friction locks cause throttle levers to stick.
S: That's what they're there for.

P: IFF inoperative.
S: IFF always inoperative in OFF mode.

P: Suspected crack in windshield.
S: Suspect you're right.

P: Number 3 engine missing.
S: Engine found on right wing after brief search.

P: Aircraft handles funny.
S: Aircraft warned to straighten up, fly right, and be serious.

P: Target radar hums.
S: Reprogrammed target radar with lyrics.

P: Mouse in cockpit.
S: Cat installed.

P: Noise coming from under instrument panel. Sounds like a midget pounding on something with a hammer.
S: Took hammer away from midget.
 

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Discussion Starter #12
Ah got it, I waited for the bike to warm up fully to 180 however when first starting up the bike the missing was worst than before, I then had my friend rev and hold 5000rpm's and both cylinders were still in the 300's while the two middle ones were in the upper
500's.

"And the other bit was just a joke...
Problem: Engine missing
Soluting: Engine found under gas tank...
Sort of like the aeroplane joke:"

Now I see where your coming from had a good laugh.
 

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Cool...

Double check the connections at the coils and that they are seated on the plugs properly and see how you go...
 
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