Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: bike addict on April 06, 2016, 05:31:08 PM

Title: CB500 K0 Carb Needle Jet settings
Post by: bike addict on April 06, 2016, 05:31:08 PM
Hi. Would anyone have any advice for what groove the standard needle jet setting is please for my CB500/4 K0? It runs all all original carbs, pipes, air box and filter. My original Honda owners manual and all the other references I have seem to omit this detail. Your help much appreciated. Many thanks.
Martin
South Coast Sussex
Title: Re: CB500 K0 Carb Needle Jet settings
Post by: hairygit on April 06, 2016, 05:39:35 PM
As a rule, Honda set them to the middle notch.

Sent from my D2303 using Tapatalk

Title: Re: CB500 K0 Carb Needle Jet settings
Post by: Johnwebley on April 06, 2016, 07:51:27 PM
I recently re-built my 500k2 carbs,

  I think they were still original settings,all 4 needles were 1 slot above the bottom slot,


Title: Re: CB500 K0 Carb Needle Jet settings
Post by: Bryanj on April 07, 2016, 07:06:36 AM
Standard is middle groove
Title: Re: CB500 K0 Carb Needle Jet settings
Post by: deltarider on April 07, 2016, 08:10:36 AM
Standard is 3rd (middle) position. An American Honda Motor Company spec. booklet (1977!) is the only source that recommends 4th. On the same page it recommends to have the airscrews 2 turns out instead of the 1 +/- 1/8 documented everywhere else. If that information is true, my guess is that US was interested in a less polluting idle and compensated this by bringing the needle a bit higher. FWIW.
Title: Re: CB500 K0 Carb Needle Jet settings
Post by: bike addict on April 07, 2016, 01:18:44 PM
Many thanks for all your input - it's much appreciated. I'll go with the middle (third) groove to begin with and then go from there.
Title: Re: CB500 K0 Carb Needle Jet settings
Post by: ST1100 on April 07, 2016, 06:56:16 PM
Quote from: deltarider on April 07, 2016, 08:10:36 AM
...my guess is that US was interested in a less polluting idle and compensated this by bringing the needle a bit higher. FWIW.
Still are...
Even the ST1100 has smaller main and idle jets over there...