Author Topic: CB400f with K&N Pods Filters - what carb jetting are you using ?  (Read 2241 times)

Offline 400 Cafe Racer

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Re: CB400f with K&N Pods Filters - what carb jetting are you using ?
« Reply #15 on: May 27, 2023, 10:45:11 PM »
Hi Sam,

Sorry I couldn't get back to you sooner. Lifes very hectic at the moment and haven't had time to get back to mine yet  :(.

In your circumstances I would  just concentrate on getting the bike started after the rebuild of carbs on something like 1 1/4 turns on all carbs. Warm up the engine and set the throttle so it will idle near the normal idle speed.

At this point turn each mixture screw 1/4 turn out and see if the engine slows down or speeds up. If it speeds up, (leaning the mixture) then reset the idle speed and do the same again, repeat the process until the idling becomes less even and slower (now too weak). Now go back to the sweet spot in between where it is the most efficient  idle mixture setting for idle speed.

Test throttle response for good pick up and give it a road test.

Let us know how you get on.  ;)

Hope this helps

Dennis  :)

« Last Edit: June 24, 2023, 09:10:49 PM by 400 Cafe Racer »
Retired Automotive Engineer   MIMI, MITRE, DMS, MCMI.

Latest    - 1979 CB400/4  Cafe Racer - Parakeet Yellow
              - 1939 Velocette GTP 250 twin port Two stroke

1988-91 - Lamborghini Countach QV replica design and
                 build - 3000hr spare time project

In 1956 at 12yrs old and dirt tracking
              - 1937 Rudge 500 4 valve
              - 1940s Royal Enfield 225sv
              -  Ex WD Norton 500sv

 

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