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Author Topic: Running Lean?  (Read 2521 times)

Offline Johnny4428

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Running Lean?
« on: March 23, 2022, 07:50:29 AM »
Does this look excessively lean running?
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1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1974 Honda CB550K1
1978 Honda CB550K3
1999 ST1100 Pan European 50th Anniversary.
1975,1984,1986 Honda C90’s
1973 Honda CB750K3
1977 Honda CB550 (almost)

Offline Nurse Julie

  • 1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
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Re: Running Lean?
« Reply #1 on: March 23, 2022, 08:14:49 AM »
Yes. Are all four the same John?
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Offline Johnny4428

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Re: Running Lean?
« Reply #2 on: March 23, 2022, 09:40:21 AM »
Yes pretty consistent across all four Julie.
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1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1974 Honda CB550K1
1978 Honda CB550K3
1999 ST1100 Pan European 50th Anniversary.
1975,1984,1986 Honda C90’s
1973 Honda CB750K3
1977 Honda CB550 (almost)

Offline Sesman

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Re: Running Lean?
« Reply #3 on: March 23, 2022, 10:17:15 AM »
Are you sure it’s lean. I know it difficult to tell from the photos, but that looks pretty good to me.
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Offline Sesman

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Re: Running Lean?
« Reply #4 on: March 23, 2022, 10:27:21 AM »
Assuming it’s the 550K3, are you running 98 or 100 mains?
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Offline McCabe-Thiele (Ted)

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Re: Running Lean?
« Reply #5 on: March 23, 2022, 10:37:22 AM »
I would be happy with that plug colour.
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Honda CB400NA Superdream (current money puddle)
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https://www.sohc.co.uk/index.php/topic,28541.0.html
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Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
This is a neat 500 restoration in the USA.
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556

Offline K2-K6

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Re: Running Lean?
« Reply #6 on: March 23, 2022, 11:12:26 AM »
Looks fine to me too.
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Offline Johnny4428

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Re: Running Lean?
« Reply #7 on: March 23, 2022, 12:09:05 PM »
Thanks guys, it’s actually running pretty good, I will maybe just leave as is. Think it’s 98 main.
« Last Edit: March 23, 2022, 12:22:10 PM by Johnny4428 »
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1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1974 Honda CB550K1
1978 Honda CB550K3
1999 ST1100 Pan European 50th Anniversary.
1975,1984,1986 Honda C90’s
1973 Honda CB750K3
1977 Honda CB550 (almost)

Offline paul G

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Re: Running Lean?
« Reply #8 on: March 23, 2022, 12:15:19 PM »
Looks good to me
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Offline Sesman

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Re: Running Lean?
« Reply #9 on: March 23, 2022, 02:06:16 PM »
If you are losing sleep over it go to 100, but I doubt it will make a big difference and the colour looks fine to me.
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Offline deltarider

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Re: Running Lean?
« Reply #10 on: March 23, 2022, 03:22:42 PM »
I find it hard to comment on colors in pics, especially the coloring of plugs. The colors in the pics we produce are never calibrated, so it's always a guess. My first impression is, that the plug shown is slightly on the lean side, but it's thus slightly, that if the colors in the pic were calibrated, I could come to the conclusion it looks fine. Not much help, I'm afraid. :-\
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