Question about 1993 Honda CBR 900 RR Fireblade
I have a 1993 CBR 900rr and gas is leaking from the carb air vent tube. Took the top cap off carbs and there appears to be gas and a muddy substance there. Diaphrams seem to be intact yet they definitely have had contact with the gas. Any Ideas?
Hi, Blackwidowbi and the usual suspects are:
1. Damaged or restricted fuel tank venting system.
2. Loose float bowl screws.
3. Damaged float bowl o-ring.
4. improper fuel level in the float bowl.
5. Worn or dirty inlet valve or seat.
6. Damaged or leaking float assembly.
7. Particle contamination in inlet fitting cavity.
8. Damaged petcock diaphragm allowing fuel to flow through the vacuum line into the combustion chamber.
9. Contaminated fuel tank.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Leaky Carburetor CBR Forum Enthusiast forums for Honda CBR Owners
CBR 600 F2 1994 Fuel overflow Honda Motorcycles FireBlades org
Honda CBR900RR Service Manual
Honda CBR900RR Fire Blade Owner Manual
Posted on Jun 22, 2017
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Posted on Jan 02, 2017
Dont rebuild unless absolutetly necessary or need to rejet. Try some Seafoam first, it might save you hundreds of dollars and a lot of frustration.
read directions on can or just try pouring 1/3 can into two gallons gas and really get on it ...it might clear up any hesitation or stalling if thats whats happening. I got mine at Autozone for $10.( And it fixed the problem after riding for about 15 miles.)
Posted on Sep 15, 2009
Could be the carbs (difficult).
It could also be lack of spark (easy fix if you only have to replace spark plugs. Fix is more difficult if you have bad spark plug wires or a problem with the ignition system that makes the spark at the right time).
In any case, the unburned gas has to go somewhere so it runs down the cylinder wall and the piston rings will not seal well enough to keep it out.
Posted on Nov 20, 2009
SOURCE: i have a 1999
definately need to purge your fuel system, fluch the tank real well and make sure there is no rust inside, and yes you will have to do a thorough carb clean, use parts cleaner and clean and **** every jet and port and make sure you clean them really well. only thing to be careful of is when you **** the jets and ports to not force and **** into the holes you dont want to accidently bore out your jets to a bigger size.
Posted on Jun 10, 2011
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