CBR 1000F "Hurricane" 1987-1996 CBR 1000F

Main jet size

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Old 08-02-2011, 11:15 AM
slick90's Avatar
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Default Main jet size

I have a 1990 cbr1000 with 2 brothers header what is the best main jet size, I am running 125 now.
 
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Old 08-02-2011, 11:44 AM
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Hey:

Where do you live? Is there an indicator that is the wrong jet size? That sounds about right for most unrestricted CBR1KF bikes at sea level -<1000'. Is the bike running fine or do you have a poor running condition? Where@ if you do (RPM). Do you have stock or K&N filter? 122.5 (stock ?) may work fine as well if it appears rich now. As long as you don't drive at full throttle 10k+ RPM at altitude uphill for hours at a time. LOL

Dub
 

Last edited by CBR1988; 08-02-2011 at 09:35 PM.
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