CBR 600F 1987 - 1990 CBR 600F Forum

89 hurricane will not run at low rpm

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Old May 23, 2011 | 01:50 PM
  #1  
zophar's Avatar
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Default 89 hurricane will not run at low rpm

Need help fast guys before I put a bullet in this thing.

I changed plugs and cleaned the air filter last week, and did a full vinyl wrap job on the bike. I go to ride it today and it fires up good cold.... after about 2 minutes the idle jumps to 3k rpm and won't drop.

I went back through everything I did and can't find anything wrong.
I can get the idle to drop to around 2k rpm for a little bit and then it either stumbles down to 13000 and dies or raises back up to 4k rpm.

I took it around the block to see what it was doing in gear. Its surging kind of, and when I come to a stop it dies and I have to give it half throttle or so before it will fire back up.
Please help fast guys its getting on my nerves.
This is my week for vacation and I can't even ride.
 
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Old May 23, 2011 | 02:35 PM
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Did you clean the carbs recently? If so did you remove the venturi plates?
 
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Old May 23, 2011 | 03:48 PM
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Clean the carbs and look for a vacuum leak around the carb boots...
 
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Old May 23, 2011 | 04:46 PM
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Choke cable bound up somehow and wasn't releasing. Fixed it.
 
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Old May 23, 2011 | 05:09 PM
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Originally Posted by zophar
Choke cable bound up somehow and wasn't releasing. Fixed it.
Next time you clean the carbs take the choke link shaft out and wipe it down, they can get gummed up pretty good. Also a good idea to lube that choke cable.
 
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