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Old 01-10-2007, 06:42 AM   #1
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2001 Yamaha R1

HBO-Help a Brother Out!!

I need some suggestions on this monster! Firend of mine has a 97' ZX9. The bike starts with no problem. warms up fine. Once the bike is warmed up and you roll the throttle on, it bogs down like the carbs are flooding out. If you roll on it slowly, it seems okay! Its when you roll it moderately to fast it bogs and most of the time will die out. I let it warm up to 180 degrees and sprayed WD40 on each exhaust port at the head. #1, #2, #3 was hot. #4 was not as hot. Do I need to clean re-synq the carbs or do I have a bigger problem here? I will be back on line this evening to respond, gotta go to work now! Thanks!
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Old 01-10-2007, 06:51 AM   #2
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Has the bike sat up for awhile?
If so, the carbs may be dirty. Pull them out, disassemble them and clean them.

Although I doubt you'll find anything, pull the #4 plug and inspect the wire and plug cap for corrosion, cracking etc., but I'll bet it's the carbs.
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Old 01-10-2007, 07:46 AM   #3
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something else to consider, if it sat...fuel condition, or fuel filter/pump. My old bike sat for a while, while it was getting painted and the filter and pump went bad and I had simular problems.
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Old 01-10-2007, 08:29 AM   #4
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YEP +1 to Patrick, sounds like trash to me
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Old 01-10-2007, 09:02 AM   #5
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classic symptoms of junk in the carbs. . .
I understand the consequences of my actions prior to engaging in those actions. . .there are certain situations in life where the risk is totally worth the reward.
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Old 01-10-2007, 09:16 AM   #6
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Carbs are shot
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Old 01-10-2007, 08:56 PM   #7
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2001 Yamaha R1

Thanks! It hasn't been sitting for awhile and the fuel tank has been drained and cleaned out, the filter changed. I was just afraid a cylinder was blown or something.
Guess I will be pulling the carbs this weekend. Wanted to make sure it wasn't something simple before I moved on! Thanks guys! Big help!
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