Author Topic: Float valves (needle valves) for CB350/550  (Read 866 times)

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Offline Scott S

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Float valves (needle valves) for CB350/550
« on: November 09, 2014, 06:13:22 PM »
 I've tried to "repair" some problems we're having with a 350F by replacing bad needle valves with some stuff I had in my carb parts box. Not working....

 I'm still getting a funky idle and the #1 carb overflow tube is damp at the end and I can smell gas in the garage. This float valve was weak and I replaced it with a used one. This'll be the 3rd issue I've had with the float valves in these carbs. I'm ready to replace them but new Honda sets are ~$100 for all four carbs. That's not bad considering it's the same price I'm seeing for the Keyster kits.

 I know the Keyster jets leave a lot to be desired. What about the float valve sets?
 Should you always replace the valves and the seats as a set? If not, where can I find four new needle valves at a good price?
 Or should we just bust out the Benjamin and get the Honda kit?
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline flybox1

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Re: Float valves (needle valves) for CB350/550
« Reply #1 on: November 10, 2014, 07:19:20 AM »
as i posted in your other thread.....
keihin replicas, not keysters (they sell those too  ;D )
I put these in my 350F and had no issues.

http://4into1.com/replica-keihin-float-needle-valve-assembly-16011-329-004/
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

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Offline Scott S

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Re: Float valves (needle valves) for CB350/550
« Reply #2 on: November 10, 2014, 01:41:44 PM »
 Thanks again! Ordered!
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650