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Discussion Starter · #1 ·
I did a search and did not come up with much. It seems like a simple answer but not sure it is.

Bike ran fine at the end of last winter. This season I changed the plugs as they where about 5 years old. Stock when new. Not sure what I got, what ever they gave me really. Odd thing here is dealer repair manual says gap should be .07mm and old ones that came out where only about .03mm. I looked at the .07mm and said yeah I don't think so and went with the .03mm gap. Got everything done and went for a ride today.

Sometimes and not all the time the bike likes to stutter on the low RPM range when I am coming off the gas. Decelerating after being on it and thats when it starts to stutter and sometimes to the point of a stall. If I pull the clutch in it will stall I will let out the clutch gas it and it will go again and so it continues.

This happen off and on all day, seeming to be better when the bike was above 210 on the temp side and doing this more often when below 180. It was only 45 out today so not the best day out.

Could this be the cold weather, the plugs?

Stock computer with aftermarket pipe and ran fine until I changed the plugs this year? Should I disconnect battery and let it remap itself for the colder weather right now?

No FI codes either?

Stummped alittle on this one.

Thanks in advance from anyone that can shed some light.
 

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Discussion Starter · #4 ·
Your plug gap is way tight. Gap should be 0.028-0.031 inches (0.7-0.8 mm). I'm sure that's why it is misfiring, and you may have to clean the plugs too, as they may be fouled.

What year and model is your bike?
Bike is K5 GSXR 600 and plugs are brand new, thus the problem, it did not happen with the old plugs in there? Could it just be the gaps are wrong. I set them to what the old plugs where.
 

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Discussion Starter · #7 ·
Okay so I took the bike out today and poof running perfect again. So this is my thoughts and just want you to yeah or neah them. Could the problems I was having be due to water in the gas?

I know the problems I had was on the first day I ran bike since the winter and as a idiot would do I forget to fill gas tank on bike before storing it, thus I assume it condensation occurred and water ended up in tank. I did fill the tank that day with fresh gas but could the problems have been the water and old gas burning off and now I am on to the mostly fresh gas?
 

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That could also be the problem as well, bad gas could do that. But .3 mm really is the wrong spark gap, and you should reset it if that is what they are. If it is otherwise running okay, they will probably widen as you ride if you don't want to mess with them.
 
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