Bad gas, fouled spark plugs or...? - KawiForums - Kawasaki Motorcycle Forums
 
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post #1 of 10 (permalink) Old 09-10-2006, 06:31 AM Thread Starter
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Bad gas, fouled spark plugs or...?

Hi all,

I took my bike (2005 ZX6r with 3k miles) out for a ride today after two weeks in the garage and at the stop sign it started idling below 1k and then when I acclerated it lost power at 5k rpm then at 8k rpm. I left it out during a major rain storm last week.
I jumped on the highway and sure enough it lost power for a second or so at 8k again. When I say it lost power I mean I accelerated and it just went boggy and wouldn't make power briefly while I had WOT throttle. It started to idle fine at stoplights, but getting back on the highway it lost power again at 8k rpm.
I'm thinking I got some bad gas, fouled spark plugs or water in the Two Bros dual exhaust that may need to be worked out?!
I haven't put gas in the bike since the last time, about two weeks ago when I put it in the garage.
Any suggestions,
Thanks!
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post #2 of 10 (permalink) Old 09-10-2006, 07:23 AM
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I would say drain the tank and put fresh gas in it, see what happens and go from there.
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post #3 of 10 (permalink) Old 09-10-2006, 08:25 AM
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I'm having this same problem man.. I was running my lil 250 super hot on the highway.. Taking her as fast as she can go 105 indicated? Well when I got off I filled it up with midgrade (unlike the 636 it takes the cheap shit), well for the rest of my ride home it lost soo much power and bogs down to all hell... Well I neglected to fix the problem and the next day road to my girlfriends... The ride there had no problems, but on the way back I lost some massive power.. I could barely get up to 70 MPH.. Which isn't fun at all at 2 A.M. when everyone does like 85 MPH. I blame it on the gas, (for me could also be, something blocking air intake, bad valve clearances, super shit gas). Gas seems most logical to me. Seems like these gas stations are putting water and ethanol in the gas, cause my boat outboard performs like shit too. Well best of luck to you bro!
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post #4 of 10 (permalink) Old 09-10-2006, 05:16 PM Thread Starter
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Thanks guys!
I'm going to fill her up this morning and see what happens!
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post #5 of 10 (permalink) Old 09-10-2006, 11:08 PM
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i had a similar problem and changing the spark plugs cured it. Or it may have been the fact that i ran the bad gas out of the system. My bike had over 10,000 miles so sparkplug change was coming up neway
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post #6 of 10 (permalink) Old 09-10-2006, 11:23 PM
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seems spark plugs are a common cause for a lot of driveability problems. especially if u have over 5k miles (talking from experience).
post #7 of 10 (permalink) Old 09-12-2006, 01:40 AM
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Hmm perhaps mine is the spark plugs, I pulled em out, and there was hardly any fouling, the plug was pretty damn clean and I have 9,000 on my bike.. I plan on replacing em anyways.
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post #8 of 10 (permalink) Old 09-12-2006, 04:11 AM
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I had the same problem on my 636. It happened around 5000 miles. Needed new plugs.
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post #9 of 10 (permalink) Old 10-06-2006, 05:37 PM
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Well I fixed my problem, it had some nasty bad gas, I drained the carb bowls and let it sit.. There was a shit load of gas.. I'm sure you just got the shitty end of the tank! This just isn't right though... damn gas companies!
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post #10 of 10 (permalink) Old 10-06-2006, 06:11 PM
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wow wearing out the plugs so quickly?
mine were changed at about 5k, only b/c the engine was out for the tranny rebuild, and figured wth.
but ive got almost 11k since, and not a single problem. starts and runs strong and smooth, everytime.

for all thats been needing to change plugs so quickly, do u have aftermarket exhaust?
mine is still stock, i wonder if that has anything to do with fouling them, or wearing them out soo quickly?
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