Author Topic: Keihin CR carbs fuel line  (Read 1251 times)

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Offline Artracing

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Keihin CR carbs fuel line
« on: March 17, 2026, 05:50:57 PM »
After several operations and several years recover, I'm bike on my bike build. I bought new set CR carbs number of years ago and cant find manual or manual online. I did find a 4 page  diagram with needle setting, but no fuel line reference
I'm confused on fuel line fittings.
I see one line in center front appears to be the main fuel line feeding all carbs. Where I'm confused are the left side fittings that look like they are also for fuel.
I assuming these are vents?

Rob
 

Offline paul_cb836

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Re: Keihin CR carbs fuel line
« Reply #1 on: March 18, 2026, 12:48:06 AM »
My CR carbs have three fuel access points. I use two and leave the other blanked off. On my methanol bike, the pingel flows fuel to both. On my road bike, one flows fuel, the other is for reserve as per the standard CB fuel tap.

Offline MRieck

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Re: Keihin CR carbs fuel line
« Reply #2 on: March 18, 2026, 04:03:28 AM »
After several operations and several years recover, I'm bike on my bike build. I bought new set CR carbs number of years ago and cant find manual or manual online. I did find a 4 page  diagram with needle setting, but no fuel line reference
I'm confused on fuel line fittings.
I see one line in center front appears to be the main fuel line feeding all carbs. Where I'm confused are the left side fittings that look like they are also for fuel.
I assuming these are vents?

Rob
The 4, black 90 degree vents on the each carb are for the cold start system. As was mentioned...the CR's can be set up up with either 1 or 2 fuel lines that connect to the T fittings between the carb bodies.
Owner of the "Million Dollar CB"