Author Topic: Does anyone know how many CB500s vs 400/4s were made?  (Read 1181 times)

Offline taysidedragon

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Re: Does anyone know how many CB500s vs 400/4s were made?
« Reply #15 on: October 21, 2018, 04:00:07 PM »
When you open a reply window there is an Attachment link below the 'box". Click on that then select your file for attachment. I don't think you can put an attachment in a pm so just post it here? 👍
Gareth

1977 CB400F
1965 T100SS

Offline deltarider

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Re: Does anyone know how many CB500s vs 400/4s were made?
« Reply #16 on: October 22, 2018, 11:53:13 AM »
Did my best to make a decent scan, but please realise the font size in the original is minute and the magazine was printed on toiletpaper (the cheap, grey kind). Hope it's readable. I read the article over myself and I have a few comments. I wouldn't qualify plugcaps with a 10k to 12kΩ resistance still usable. And a 2 CO% at idle, well, I don't know, to me that sounds like too lean for a good driveability on acceleration from idle. On the subject of CO testers, I just acquired a used one real cheap (Hawk), but I don't have it working yet. I have a problem to get the needle in the middle (balance), prior to testing. Any of you who can guide me on this?
« Last Edit: October 22, 2018, 12:18:19 PM by deltarider »

Offline hairygit

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Re: Does anyone know how many CB500s vs 400/4s were made?
« Reply #17 on: October 22, 2018, 12:22:22 PM »
I remember reading a book some years back about motorcycles in general, and oddly enough it showed a 750F1 being emmisions tested for whatever reason, and I remember that stating that it should be around 2% CO  reading at idle. Bear in mind of course that U.S. emissions regs were already getting tight by that time, that's why the later K's were detuned quite a bit compared to K0's etc, and the F1 was an effort to restore 1969 performance levels on what was becoming quite an old design by then
If it's got tits or wheels, it's hassle, if it's got both, RUN!!!

Offline taysidedragon

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Re: Does anyone know how many CB500s vs 400/4s were made?
« Reply #18 on: October 22, 2018, 01:17:26 PM »
Thanks deltarider. £3 an hour for Labour! Those were the days. 😁

I always set tappets when the engine is cold after leaving it overnight. Interesting that they just set them when still warm.
Gareth

1977 CB400F
1965 T100SS

Offline deltarider

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Re: Does anyone know how many CB500s vs 400/4s were made?
« Reply #19 on: October 22, 2018, 02:02:10 PM »
I remember reading a book some years back about motorcycles in general, and oddly enough it showed a 750F1 being emmisions tested for whatever reason, and I remember that stating that it should be around 2% CO  reading at idle. Bear in mind of course that U.S. emissions regs were already getting tight by that time, that's why the later K's were detuned quite a bit compared to K0's etc, and the F1 was an effort to restore 1969 performance levels on what was becoming quite an old design by then
Could well be the case as the US was in particular keen on lowering emissions at idle. Bikes like mine however need 6% CO overall to run right.

 

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