Carb float valve

martym · Post by **martym** » Mon Nov 10, 2008 12:30 pm

Hi fellow slaves to the CBX,I have just finished rebuilding my 1980 carbs with Keyster kits ,I have set them up on the bench and filled them to check for leaks and initially all seamd ok but after few mins 3 carbs started to overflow, tapped the bowls and drips stoped for awhile but then started again, rechecked float hight ,seemed ok but reset them slightly low and retried but still overflowing ,so the question is do you think it is just the new valves not seating? because I am tempted to refit my old valves as don't recall having a prob with them or should I give the new ones a chance

EMS · Post by **EMS** » Mon Nov 10, 2008 1:54 pm

I may be totally wrong here, but I seem to remember that somebody posted about not using the float valves out of the Keyster kits.... Am I off?

Rick Pope · Post by **Rick Pope** » Mon Nov 10, 2008 3:08 pm

[I may be totally wrong here, but I seem to remember that somebody posted about not using the float valves out of the Keyster kits.... Am I off?]

Mike, You are no more "off" than the rest of us. :) Bti I too remember someone saying that the stock needles and seats are far superior to the Keyster items.[/quote]

daves79x · Post by **daves79x** » Mon Nov 10, 2008 4:28 pm

Get the original Honda items back in there. All aftermarket float valves have that problem. They will seal fairly well eventually, but the risk of hydrolock is too great. The Honda items will last 80,000 miles and more.

Dave

martym · Post by **martym** » Mon Nov 10, 2008 5:43 pm

Thanks for you interest and advice fellas,I'll put the old valves back in and give that a try, I'll let ya know how I get on.

alimey4u2 · Post by **alimey4u2** » Tue Nov 11, 2008 6:41 am

I actually run the original 1980 Keihin float valves in my Mikuni's, ( I prefer the soft seats) never a days trouble...