CBR 600F2 1991 - 1994 CBR 600F2

F2 Carb Sync

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  #1  
Old 04-13-2011, 02:42 PM
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Default F2 Carb Sync

Ok so my bike has a MAJOR hesitation between about 3-6k RPM...it is soooo sluggish.

So I bought my joint boosts, built a homemade manometer, and hooked it up.

However, carb 3 pulled the 2-stroke oil SUPER fast...way faster than the rest.

What is a better way to do a carb sync? Nobody in my area seems to do one for these bikes anymore.

Which way do i turn the adjustment screw? I cant even leave the bike on long enough to do an adjustment...the oil would get sucked in the carb and white smoke my garage

Thanks,

Brandon
 
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Old 04-13-2011, 03:05 PM
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Get one of these. Not fluid based.


$83.95 from holeshot performance
 
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Old 04-13-2011, 03:50 PM
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Before I did my carb sync, I inspected the throttle openings while the carbs were out for cleaning. With a flashlight shining on one end and looking through the other, I adjusted the sync screws until all openings are as uniform as I can get them. When I did my sync, I barely had to do any adjustment. I learned to do this with my older Virago V-Twin.

In your case, I'd expect the opening on carb #3 to be bigger than the others. If not, there maybe other issues - not uniform compression, vacuum leaks, etc..

As suggested above, you don't need to take out the carburetors with a sync tool.
 
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Old 04-14-2011, 03:38 PM
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Is there anywhere I can buy those gauges instead of paying $83.

What are those gauges called, they just measure vacuum pressure?
 
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Old 04-14-2011, 04:09 PM
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Those gauges are on eBay
 
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Old 04-14-2011, 05:17 PM
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It's $83 to buy those gauges brosef!
 
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Old 04-16-2011, 07:50 AM
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are you just using pipe? you need to have a football pump needle type of thing in each line to reduce the suction
 
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Old 04-29-2011, 02:05 AM
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Yes...I was using just pipe...i suspect I need to put something in the line. Like a football needle you say?

What have you used and where do I get it?

Im going to give this homemade manometer one more chance.
 
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Old 04-29-2011, 12:10 PM
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If you use a heavier fluid, it won't move as fast. If the liquid is getting sucked out of the line into a carb, your sync is way off, or you have a leak in the line somewhere...
 
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