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CBR900RR Fireblade carb plumbing / connections

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15K views 6 replies 2 participants last post by  jseaman  
Holy cow James!!! Try any limit your questions to 3 per post!:rotfl:

You're right on with the airbox. The tab on the right from the bottom of the airbox is the crankcase vent from the top right of the cam cover. The very large center pivoting breather hose in the middle of the carbs connects to the sub-air cleaner that bolts to the rear end of the airbox.

The small breathers that come out from the top of the carbs and vent to the right of the carbs to the single tube just vents to atmosphere.

The small hoses on the bottom of the float bowls just drain the fuel in the bowls to the ground. They do nothing and can be removed. They disn't come standard and have been added at some point. They are useless really. Remove them.

The small vacuum hose coming off the cylinder head under the carbs on the right was to activate the original fuel valve on the gas tank. Cap it at the head if your not using a vacuum operated tap.

In your third picture, you're finger is pointing to the main fuel inlet tube. That will connect to your fuel tap.

In the photo above question 5 I can't really see what you mean. The only hose I see is the air bleed coolant hose that goes to the head from the water pump.
 
The sub air cleaner has only the one tube connection, then it just bolts to the end of the air box. There should be a small foam element inside the little box. It looks like this:



And the float bowls drain via screws shown here. Just remove the tubes.