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SOHC.co.uk Forums => CB500/550 => Topic started by: Honda Al on April 28, 2016, 06:30:40 PM

Title: Idle Mixture Setting
Post by: Honda Al on April 28, 2016, 06:30:40 PM
Hi all,

Forgive me if this has been covered elsewhere, but what is the adjustment setting for a CB500 K1?

I've read two pieces of information -

1. 1 turn + 1/8
2. 1 1/2 to 2 turns.

Anybody found one better than the other?

Thanks, Alan
Title: Re: Idle Mixture Setting
Post by: ST1100 on April 28, 2016, 06:50:28 PM
Original air-filter/box?
Which jet size?
Title: Re: Idle Mixture Setting
Post by: Honda Al on April 28, 2016, 07:01:15 PM
Original air-filter/box?
Which jet size?

Original air filter and box. Not sure about the jet size - assuming standard?? I've not changed it.
Title: Re: Idle Mixture Setting
Post by: deltarider on April 28, 2016, 09:15:39 PM
What source says 1 1/2 to 2 turns?
1 turn +/- 1/8 is official but for some reason the yanks have different.
Title: Re: Idle Mixture Setting
Post by: Johnwebley on April 28, 2016, 10:09:55 PM
Hi all,

Forgive me if this has been covered elsewhere, but what is the adjustment setting for a CB500 K1?

I've read two pieces of information -

1. 1 turn + 1/8
2. 1 1/2 to 2 turns.

Anybody found one better than the other?

Thanks, Alan

 pilot jet   40

main jet    100

 airscrew   1  plus/minus 1/8

BUT after a Cruzimage rebuild kit,seems to be better at 1 1/4 airscrew,suggest you start at 1 turn,then adjust by 1/8 and see
how it goes
Title: Re: Idle Mixture Setting
Post by: Honda Al on April 28, 2016, 10:11:36 PM
What source says 1 1/2 to 2 turns?
1 turn +/- 1/8 is official but for some reason the yanks have different.

Clymer manual.
Title: Re: Idle Mixture Setting
Post by: deltarider on April 29, 2016, 07:22:01 AM


What source says 1 1/2 to 2 turns?
1 turn +/- 1/8 is official but for some reason the yanks have different.

Clymer manual.


Although there's a Clymer on the shelf, I never consult it. If you refer to page 109, it could well be a CB550 carb is in that picture.
When I set my CB500 like Clymer says, it will pick up poorly and runs hotter the last kms in the city when I return from a ride. Mine is happy around 1 turn out.
You may read: http://www.sohc.co.uk/index.php/topic,9915.msg70445.html#msg70445