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Author Topic: Stock spark plugs in the CB 750  (Read 868 times)

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Offline beemerbum

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Stock spark plugs in the CB 750
« on: October 09, 2021, 03:40:27 PM »
What brand and model of spark plug did Honda install in the SOHC4 CB 750 as it came from the factory? Did this change over the years of production?
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Offline evinrude7

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Re: Stock spark plugs in the CB 750
« Reply #1 on: October 09, 2021, 03:59:58 PM »
Quote from: beemerbum on October 09, 2021, 03:40:27 PM
What brand and model of spark plug did Honda install in the SOHC4 CB 750 as it came from the factory? Did this change over the years of production?
Was it denso?

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cb750 k6 - ugly

Offline beemerbum

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Re: Stock spark plugs in the CB 750
« Reply #2 on: October 09, 2021, 04:45:19 PM »
Could be. If I recall accurately Hondaman spoke to the subject. He cited a Nippon Denso plug as being made specifically for the CB 750. However, I can never find my car keys
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Offline bryanj

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Re: Stock spark plugs in the CB 750
« Reply #3 on: October 10, 2021, 01:12:45 AM »
I only ever saw NGK in the UK  D8ES from memory
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline Mark K

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Re: Stock spark plugs in the CB 750
« Reply #4 on: October 13, 2021, 06:42:21 PM »
One reference - http://honda750expert.com/index.html

Another reference - Parts manual for '73-'75

Another - CB750K service manual
« Last Edit: October 13, 2021, 06:45:35 PM by Mark K »
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Current bikes
'13 Yamaha FJR1300, '73 Honda CB750K3 (current project), '19 Kawasaki KLX 140G, '72 Honda CL70K3, '70 Honda SL350 (next project)

Former bikes
'74 Yamaha 60, '72 Maico 250, '74 Kawasaki 250 S1, '82 Kawasaki KZ550, '84 Honda VF700F Interceptor, '99 HD FLSTS Heritage Springer, '97 HD FLHTCUI Ultra Classic '05 HD FLHT Electraglide, '9? Buell Lightning, '03 FLHTCUI Ultra Classic,'14 Honda CRF250L
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