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Old 15-10-08, 07:44 PM   #1
yorkie_chris
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Default Surging.

Dropped needles half a clip other day as it was a little rich in the midrange, slight blubbing when blipped from overrun. Nothing else changed.

Started to surge and hunt at cruise.

Raised needles back to original position, problem still occurs.

Thoughts? Currently looking for air leaks (quite frantically as need the bike at 7...) but any other ideas welcome.
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Old 15-10-08, 08:19 PM   #2
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Default Re: Surging.

I have same problem on an old -99. But here I can see un-vaporized gas comming out og the jet...
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Old 16-10-08, 12:15 PM   #3
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Default Re: Surging.

I know it sounds totally random and might not be it but on my Bandit that I had my chain had more than one tight spot in and each time it ran through the front sprocket it was making the power pulse/surge new chain fixed it.

Just a suggestion but you have the experience
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Old 16-10-08, 12:18 PM   #4
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Default Re: Surging.

Chain already checked, brakes are fine too, doesn't do it on the power or even with a very slight incline.

Anyway latest update there was about half a pint of gammy water in the fuel tank, very wierd for water to cause cruise problems. Going to strip and clean carbs now when I've finished me brew and try it again.
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Old 16-10-08, 12:39 PM   #5
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Default Re: Surging.

Good lad see if you can find it! Sorry about Sunday anyways mate. (breaking down)
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Old 16-10-08, 12:40 PM   #6
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Default Re: Surging.

Don't worry about it, I thought you were behind me until skipton untill some dude on a daytona went past me.
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Old 16-10-08, 12:43 PM   #7
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Default Re: Surging.

HAHA yeah the lights are the same shape aren't they. Never mind and good luck!
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Old 16-10-08, 02:00 PM   #8
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Default Re: Surging.

No chance the needle's not fully seated? I did that once and it popped out of its seat after a while, meaning it would occasionally jump in and out of the jet.
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Old 16-10-08, 02:24 PM   #9
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Default Re: Surging.

Had it out again since and refitted it, nothing seemed amiss. Also the roll on and 5-7k don't seem affected at all.
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Old 14-11-08, 01:28 PM   #10
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Default Re: Surging.

Cured it, turned out to be a blob of something in the pilot circuit.
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