Topic: CB 550 carb question

[Ghostbuster]

Double checked the float height 22mm. Regarding the main jets I positioned them with the small hole upwards (when mounted on the bike) (just like the old ones)

Where on the carbs can i see what type they are?

[Deltarider]

Here

[Ghostbuster]

Hi again, had a look at the carbs this weekend, they are officially 022A, does that make sense on a 75' 550?

[Deltarider]

Yep. So official setting for yours is found on p 165. of the Honda Shop Manual 500-550. But not even Honda is perfect. They made a mistake over the left column. 500 should be read as 550. So officially it is 4th groove for the 550, (3rd for the 500).

[Ghostbuster]

Ok, well like i said earlier I think that the next step for me will be to take the bike for ride and pay close attention to my spark plugs. Now that I have the needle in 3'rd grove I will start my run on D8EA spark plugs as a beginning.

I'll let you know how the bike runs, when spring comes 

[Deltarider]

You could enrichen a bit by turning the airscrews in a bit.

[Ghostbuster]

You could enrichen a bit by turning the airscrews in a bit.

Thanks, I'll try that, I, honestly, had forgotten all about this possibility for enrichment!

[Ghostbuster]

So the weather is here, and I have taken the bike for a couple of testruns. To summarize i installed new needle/tube, mainjet and slow jet:

Main: 100
Slow: 38
Needle set in grove 3

I run with sparkplugs a "number" colder than standard.

The bike started pretty easily (not a small thing for a hobby.mechanic).

1. test-run (10 miles). Well the bike doesn't die any more when its drives at slow speeds and gets a little throttle. If I fling the throttle very fast to full throttle it does hesitate a little (is this normal?).

When I got home i looked at the spark-plugs. They were gray. From what I know this isn't a disaster, they were definitely not white.

2. test-run (80 miles). Bike ran very good, I've noticed that after my carb rebuild it now very good to go slow in high gears When I got home i noticed a very slight brown tan on the spark plugs.

So all in all i'm very happy. It might run a little bit on the lean side (I guess that grove no. 4 or "3,5" would also be ok for the needle), but it's 100 times better than before.

By the way, I ran the test runs on shell v-power, if that s counts for anything.

[Bankerdanny]

A slight hesitation when you whack the throttle open is normal. These carbs don't have an accelerator pump, so it takes a second for the fuel flow to catch up with the throttle opening.