Author Topic: Honda CB750 - a mash up of parts  (Read 186 times)

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Offline kyle750

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Honda CB750 - a mash up of parts
« on: January 15, 2026, 05:04:42 PM »
Just listed for sale on my local Thailand facebook group. Seller has a clear title and the bike is currently registered.  Not really interested in buying as it looks like a mixup of mismatched parts but curious what other SOHC forum members see and how you would evaluate this bike?

K0 tank and side covers
Engine painted black  - similar in style to the early Kawasaki K1 engine
Wrong seat - looks too small maybe from another CB model
Fenders painted black
Front forks painted black
No speedo cable
Modified disc brake system to the rear wheel?
Rust on the rear wheel rim
Exhaust with lot of dents - header pipes look decent
Later model turn signals
Gas cap and petcock don't look right to my eye
« Last Edit: January 16, 2026, 04:35:34 AM by kyle750 »

Offline kyle750

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Re: Honda CB750 - a mash up of parts
« Reply #1 on: January 16, 2026, 02:43:26 AM »
I just read that the Honda CB750 K7 (1977-1978) Japanese Domestic Market had a rare rear disc brake. The most significant difference is the use of an F2-style swing arm and a rear disc brake, which was unique to the JDM K7 models, whereas other markets had a rear drum brake.

http://forums.sohc4.net/index.php?topic=142307.0
« Last Edit: January 16, 2026, 05:23:58 AM by kyle750 »

Offline kyle750

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Re: Honda CB750 - a mash up of parts
« Reply #2 on: January 16, 2026, 03:02:23 AM »
Seller only supplied 1 photo.  Here is the same photo zoomed in

Offline pickleknuckles

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Re: Honda CB750 - a mash up of parts
« Reply #3 on: January 16, 2026, 06:02:13 AM »
It's far from original...but I don't hate it.

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Offline kyle750

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Re: Honda CB750 - a mash up of parts
« Reply #4 on: January 16, 2026, 06:12:20 AM »
It's far from original...but I don't hate it.

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Agreed.  I'm quickly warming up to it. But just because something might be rare does not mean it is worthwhile.

Originally I completely had written of the bike as cobbled together junk but have since started a dialog with the owner. IMO it's still a mash up of parts   ???  First question to the owner - what year is the bike on the title? :o
« Last Edit: January 16, 2026, 05:54:09 PM by kyle750 »

Offline MauiK3

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Re: Honda CB750 - a mash up of parts
« Reply #5 on: January 16, 2026, 06:51:44 AM »
Engine and frame number? That may tell you if the engine/frame were kept together or if it's an assembly of parts from other bikes.
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline kyle750

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Re: Honda CB750 - a mash up of parts
« Reply #6 on: January 16, 2026, 07:09:49 AM »
Engine and frame number? That may tell you if the engine/frame were kept together or if it's an assembly of parts from other bikes.

Thanks mate.  Yes a better check. I will ask the seller tomorrow? 

Offline Stev-o

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Re: Honda CB750 - a mash up of parts
« Reply #7 on: January 16, 2026, 08:00:15 AM »
What is the asking price?   

A lot of us have had a bike with a "mash up of parts"!  Use what ya got...
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline kyle750

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Re: Honda CB750 - a mash up of parts
« Reply #8 on: January 16, 2026, 12:50:29 PM »
Older photos of the bike from the seller's FB profile

Offline BenelliSEI

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Re: Honda CB750 - a mash up of parts
« Reply #9 on: January 16, 2026, 02:01:28 PM »
My cb750K3 has a lot of parts from other years.
Nothing wrong with a good mash up.
« Last Edit: January 16, 2026, 02:09:10 PM by BenelliSEI »

Offline pickleknuckles

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Re: Honda CB750 - a mash up of parts
« Reply #10 on: January 17, 2026, 05:59:46 AM »


Agreed.  I'm quickly warming up to it. But just because something might be rare does not mean it is worthwhile.
100%

Originally I completely had written of the bike as cobbled together junk
I actually thought about doing a similar rear disc setup on my K4 that already has a K7 fork (taller lowers) w K4 tins and gaiters, and an F1 Tarozzi brace. ...but then I'd really just have a later model bike w/a '74 title. Lol.

First question to the owner - what year is the bike on the title? :o
Ha! Hopefully whatever year is on the frame.


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Offline kyle750

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Re: Honda CB750 - a mash up of parts
« Reply #11 on: January 17, 2026, 04:59:21 PM »
Still waiting to hear back from the owner.  Here are the only 2 photos of the CB750 JDM K7 that I could find ???

Strange algorithm coincidence as the 1st photo showed up in my FB feed this morning

Why does the JDM model have less HP and higher RPMs??
« Last Edit: January 17, 2026, 06:24:44 PM by kyle750 »

Offline kyle750

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Re: Honda CB750 - a mash up of parts
« Reply #12 on: January 17, 2026, 09:25:41 PM »
More photos of the CB750 sent by the owner.  Still waiting to see the title with frame and engine number but according to the seller all the numbers match the title. Having a valid title, tag, and registration on a 50 year old bike  is a big deal in Thailand and once inspected can be easily transferred to a new owner with no hassles.   The tag with 750 is very cool  8)

It is my understanding that Thailand no longer allows the importation of secondhand bikes into the country so  bringing in a vintage bike is now impossible. Before it was possible with outrageous 100 -200% import duties and VAT taxes in addition to strict and expensive emissions testing.

Late Edit:  The tailight is installed upside down  :o
« Last Edit: January 17, 2026, 10:23:39 PM by kyle750 »