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post #1 of 16 Old 07-11-2019, 07:20 AM Thread Starter
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Stumped

I have an 07 zx6r with 17k on it. It got left out during a huge downpour the other day and hasn't run right since. It is idling low and rough, smells really strongly of gasoline and is blowing white smoke...not thick but white none the less. It is not getting as hot as normal. The temp doesn't seem to get above 180 and it's hot here in Florida right now. I added new fuel and a small amount of additive thinking maybe it was water in the gas but that didn't seem to help. The bike has run like a champ until the downpour. Any ideas?
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post #2 of 16 Old 07-11-2019, 08:15 AM
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Dump the gas and replace with fresh. Pull the tank off and remove everything in there. Pour that through a coffee filter, and see if there are any chunks in it. you're looking for rust and debris which can clog injectors.

If it's not running well, it's typcially going to be a fuel related problem; in your case it's more likely that it's electrical as you have a strong odor of unburnt fuel you're dealing with. Could be one of the coils is wet. The stick coils sit right on top of the spark plugs. The one furthest downhill when the bike is on the side stand is the one that has the greatest chance of collecting water and grounding out.

since you'll already have the tank off, it's not that much more difficult to pull off the airbox and access the plugs. Good time for new plugs, too.

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post #3 of 16 Old 07-11-2019, 08:47 AM Thread Starter
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Thank you so much. Going to pull it apart this weekend!
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post #4 of 16 Old 07-11-2019, 10:43 AM
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Dump the gas and replace with fresh. Pull the tank off and remove everything in there. Pour that through a coffee filter, and see if there are any chunks in it. you're looking for rust and debris which can clog injectors.

If it's not running well, it's typcially going to be a fuel related problem; in your case it's more likely that it's electrical as you have a strong odor of unburnt fuel you're dealing with. Could be one of the coils is wet. The stick coils sit right on top of the spark plugs. The one furthest downhill when the bike is on the side stand is the one that has the greatest chance of collecting water and grounding out.

since you'll already have the tank off, it's not that much more difficult to pull off the airbox and access the plugs. Good time for new plugs, too.

Spot on advise.
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post #5 of 16 Old 07-11-2019, 10:53 AM
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Thank you so much. Going to pull it apart this weekend!
It would be a very good idea to use compressed air to blow anything out of the wells the spark plugs are in, before you unscrew them. Anything that remains in there, will fall into the cylinder when you unscrew the plug. It may also be that your spark plug wires are degraded where they plug into the stick coils. If you see any wetness anywhere on the wires, that's a likely area for a problem.
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post #6 of 16 Old 07-12-2019, 03:06 AM
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Also, when you replace the plugs it would be a good idea to use anti seize on the threads. Steel plug bodies and aluminum will corrode together.... This happens faster in the presence of rain water, especially with salty air and high humidity.
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post #7 of 16 Old 07-12-2019, 09:17 AM Thread Starter
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Thanks guys for the advise. I have a compressor I can use to clear everything out. Do I need a special tool to remove the fuel lines or anything?
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post #8 of 16 Old 07-18-2019, 06:02 PM Thread Starter
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Ok. I'm back with an update. No moisture to be found, but all four plugs came out black on the tops. I got the bike back together and cranked her up after changing the plugs and it didn't want to crank. I had to hold the throttle wide open for it to fire. Its still smoking and gas coming out of the exhaust. There is so much that the rear tire and its surroundings had a fair amount of fuel on them. When I shift into 1st the idle drops so much that I have to rev the engine so it wont die. The engine temp is still not right and is staying in the 160's, the outside temp was in the 90s today. Any other ideas?

One thing I just thought of is that the bike has a power commander. Not sure how likely that is to be the problem but worth mentioning. Thanks guys!
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post #9 of 16 Old 07-18-2019, 07:01 PM
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Ok. I'm back with an update. No moisture to be found, but all four plugs came out black on the tops. I got the bike back together and cranked her up after changing the plugs and it didn't want to crank. I had to hold the throttle wide open for it to fire. Its still smoking and gas coming out of the exhaust. There is so much that the rear tire and its surroundings had a fair amount of fuel on them. When I shift into 1st the idle drops so much that I have to rev the engine so it wont die. The engine temp is still not right and is staying in the 160's, the outside temp was in the 90s today. Any other ideas?

One thing I just thought of is that the bike has a power commander. Not sure how likely that is to be the problem but worth mentioning. Thanks guys!
Remove the power commander, and then operate the bike. They're known to go bad.....
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post #10 of 16 Old 07-19-2019, 12:15 AM
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Yup....my money is on a busted power commander.
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post #11 of 16 Old 07-24-2019, 09:16 PM Thread Starter
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Update: thank you guys so much for your input. I pulled the power commander this evening and boom fired up and ran like it should. That's great news but....

Now we are burning oil and smoking like crazy from the exhaust. No more gasoline but definitely can smell oil. Also, there is a small bit of oil smoke coming from one header at the seal...any ideas on what to do from here. Next up in my book is an oil change tomorrow in case any fuel got mixed up in there. Open to suggestions cause you guys have been right on so far.
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post #12 of 16 Old 07-24-2019, 11:13 PM
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If it was running super rich for quite a while, it may have caused damage to the rings between the pistons and cylinder walls.

I would definitely recommend the oil and filter change. Gas dilutes oil. Don't know how it affects the clutch in that case.... But you're looking for fuel contamination, and you'll smell it. Wouldn't be surprised if you find a larger volume than you should, when you drain it. Don't bother with ultra expensive oil for this change. You'll want to do this more than once.

A compression test would tell you about the state of the rings. Presuming you have already downloaded the shop manual for your bike from this site, that's got the numbers you need.

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post #13 of 16 Old 07-28-2019, 12:07 AM
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Also, when you replace the plugs it would be a good idea to use anti seize on the threads. Steel plug bodies and aluminum will corrode together.... This happens faster in the presence of rain water, especially with salty air and high humidity.
You're one of the zx6r forums wizards i swear.
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post #14 of 16 Old 07-28-2019, 03:55 PM Thread Starter
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Update #2 I did an oil change yesterday and fired her up. She seems to be running very strong and didn't miss a lick when being revved a bit. She is smoking like crazy though still and I noticed today when I went back out to work on her the pill window is empty. I put almost 4 qts of oil in her and ran her for only a few minutes. She ran long enough to heat up to 175 degrees and the smoking was getting worse so I shut her off. There is no oil on the ground or anywhere I can see. How can it burn through oil that quickly and why on earth might that happen? Thanks so much for all the help
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post #15 of 16 Old 07-28-2019, 04:55 PM
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Update #2 I did an oil change yesterday and fired her up. She seems to be running very strong and didn't miss a lick when being revved a bit. She is smoking like crazy though still and I noticed today when I went back out to work on her the pill window is empty. I put almost 4 qts of oil in her and ran her for only a few minutes. She ran long enough to heat up to 175 degrees and the smoking was getting worse so I shut her off. There is no oil on the ground or anywhere I can see. How can it burn through oil that quickly and why on earth might that happen? Thanks so much for all the help
It will be empty, when on the side stand. Has to be stood up vertical for the sight window to work. I usually place a 2X4 flat on the wide side under the side stand to prop the bike up close enough to vertical.

A lot of smoking is obviously a bad sign. That would most likely indicate a set of rings on at least one of the pistons is not making a good seal to the cylinder wall.

The smoking may be due to the exhaust can being saturated with fuel and oil.... if it smokes more as it warms up, that could possibly be the saturated oil cooking out of the exhaust. Wipe your finger around the exit of the exhaust. If your finger is oily, sooty and smells strongly of gas there's a good chance (on top of whatever else is wrong) that the can is gooped up with oil and gas. As that stuff can catch fire, it's probably a good idea to do something about that -- but I would wait until you know that's the last problem you're dealing with.

When you pull the plugs out again, to do the compression test look at the inside of the air box. It is supposed to be clean and dry. If it's covered in oil and schlock, someone may have had the bike over filled with oil. That can be very bad, if it's filled up by more than a quart or so. Take a look at your new plugs. Are they already becoming blackened with oil?

Open the filler cap for the oil, and take a whiff. Does it smell like gasoline already?

"Basic stuff fellas. Use your head for something other than to break your next fall."
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