Author Topic: Prototype CB750 Pictures  (Read 15881 times)

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Offline Magpie

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Prototype CB750 Pictures
« on: February 14, 2006, 07:40:21 AM »
These are the only pictures I've found of the prototype CB750, are there any more out there?

Offline ericstew

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Re: Prototype CB750 Pictures
« Reply #1 on: February 14, 2006, 08:06:22 AM »
In march 1969,the Cycle Guide got a "pre"K0 bike(the same model as the one on display at the Tokyo Show!)It got the K0 stripes but the Side panels are signs are different.A picture of this bike was used in the U.S. as the first advertising for cb 750 by American Honda.

I got 2 pictures of the sohc 4+4 black pipes in a CB450 frame on a test ride but it's a bit small and I can't scan it!
You got 2 pages on the Tokyo Show '68(still  a proto) on a French Moto Revue(16th of november 1968 #1906)  which I got but still can't scan it!

Contact me via mail I can send you paper copy of thoses
cb 750 k2 950SS2 Japauto
cb 750 k6 1000VX Japauto
cb 750 F1 "cafe racer"
cb 750 k3 "cafe racer"
cb 750 k2
cb 750 k7 "cafe racer"

Offline SteveD CB500F

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Re: Prototype CB750 Pictures
« Reply #2 on: February 14, 2006, 08:58:00 AM »
Glenn wrote about this on the main site:

http://sohc4.us/?q=node/91

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Offline Magpie

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Re: Prototype CB750 Pictures
« Reply #3 on: February 14, 2006, 10:18:09 AM »
Thanks1
Cliff.

Offline SteveD CB500F

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Re: Prototype CB750 Pictures
« Reply #4 on: February 14, 2006, 10:32:27 AM »
Can you read Japanese?

We've been asking for ages...
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Offline Magpie

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Re: Prototype CB750 Pictures
« Reply #5 on: February 14, 2006, 10:34:21 AM »
I'll ask my son - he's living in Japan.
Cliff.

Offline Ted Nomura

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Re: Prototype CB750 Pictures
« Reply #6 on: February 14, 2006, 12:53:25 PM »
These are the only pictures I've found of the prototype CB750, are there any more out there?

Actually the very nice blue CB750 with a CB450 type tank is not a prototype but a very early production type. it should have the frame numbers above 1000020. Pre-production units assembled in US have numbers below that. The prototype started with numbers 0000001. The prototype had different engine with cam cover and CB500 type clutch housing. Also prototype had no kill switch, different side cover with mounts, and too many other differences. This looks like the early type tested in US for duration run from LA to Las Vegas during  early 1969 with CB450 type tank to use as a disguise.
The black and white picture is the genuine prototype. 
« Last Edit: March 01, 2006, 12:36:11 PM by Ted Nomura »
1969 Honda CB750, two 1970 CB750, two 1972 CB750K2, 1971 CB500, 1975 CB550, 1976 CB400F, 1968 CL450, 1973 CL450, 1974 CB450, 1970 1/2 SL350K1, 1971 SL350K1, 1972 SL350K2, 1972 CL350, 1972 CB350, 1983 CB1000C, 1976 Kawasaki KZ900A4, 1976 KH500A8, 1979 KZ400B, 1983 ZN1300, and so on and so on...

Offline Ted Nomura

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Re: Prototype CB750 Pictures
« Reply #7 on: February 14, 2006, 12:56:28 PM »
In march 1969,the Cycle Guide got a "pre"K0 bike(the same model as the one on display at the Tokyo Show!)It got the K0 stripes but the Side panels are signs are different.A picture of this bike was used in the U.S. as the first advertising for cb 750 by American Honda.

I got 2 pictures of the sohc 4+4 black pipes in a CB450 frame on a test ride but it's a bit small and I can't scan it!
You got 2 pages on the Tokyo Show '68(still  a proto) on a French Moto Revue(16th of november 1968 #1906)  which I got but still can't scan it!

Contact me via mail I can send you paper copy of thoses

The CB750 prototype tested by Cycle Guide looks identical to the unit shown in 1968 Tokyo Motor Show except that right side cover was modified when the front part was cut-off and a makeshift mounting on top front was added.
1969 Honda CB750, two 1970 CB750, two 1972 CB750K2, 1971 CB500, 1975 CB550, 1976 CB400F, 1968 CL450, 1973 CL450, 1974 CB450, 1970 1/2 SL350K1, 1971 SL350K1, 1972 SL350K2, 1972 CL350, 1972 CB350, 1983 CB1000C, 1976 Kawasaki KZ900A4, 1976 KH500A8, 1979 KZ400B, 1983 ZN1300, and so on and so on...

Offline Glenn Stauffer

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Re: Prototype CB750 Pictures
« Reply #8 on: February 14, 2006, 12:59:44 PM »
Ted,

Have you looked at the information on www.sohc4.net about this bike?  Can you read Japanese?  Would you care to comment on the information in that article and the pictures and can I post your comments to the web site to go with that prototype article?  I was sent this information by Joe Broussard a long time ago and then, years later, had a message from someone in Germany who told me that this was not the prototype bike, but never elaborated.  What you have written here is great.  You will also see that I have some early articles on the CB750 that show early examples on the test track.  These are also in the 750 section and were received very recently from an SOHC/4 member with a large collection of old bike mags.

Glenn

Offline grumburg

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Re: Prototype CB750 Pictures
« Reply #9 on: February 14, 2006, 01:28:57 PM »
see cb750sandcastonly.com
Fonda Honda

Offline Ted Nomura

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Re: Prototype CB750 Pictures
« Reply #10 on: February 15, 2006, 11:56:52 AM »
Ted,

Have you looked at the information on www.sohc4.net about this bike?  Can you read Japanese?  Would you care to comment on the information in that article and the pictures and can I post your comments to the web site to go with that prototype article?  I was sent this information by Joe Broussard a long time ago and then, years later, had a message from someone in Germany who told me that this was not the prototype bike, but never elaborated.  What you have written here is great.  You will also see that I have some early articles on the CB750 that show early examples on the test track.  These are also in the 750 section and were received very recently from an SOHC/4 member with a large collection of old bike mags.

Glenn

Glenn,

My Japanese is in the high school level but I spent my early childhood in Japan. I started riding motorcycles in 1971 here in the United States and became very interested in Honda CB750s because they often showed up in Japanese comics. In early 1972, I was visiting the Honda shop in Las Vegas when I noticed that they were having a dealer conference and I met a Japanese gentleman who spoke no English but noted that I was checking out the 1972 CB750. When he found out that I spoke Japanese, he and I spoke for about 30 minutes before I had to go back to school from my lunch break. When I asked him about the prototypes, he told me that he was one of the test riders who rode the disguised early production CB750 between Los Angeles and Las Vegas and one was disguised with black CB450 tank and mufflers were painted black also. If the blue CB750 with CB450 tank has a frame number 1000035 and engine number 1000037, this could be one of them. As a standard Honda practice, none of the CB750s had two Honda wing emblems in each side so to be accurate, either the tank emblem or the remade side cover emblem (which is too large and wing emblem is off center) has to go. Regretfully I did not asked for the Japanese gentleman's name and I never saw him again but in 1981 and 1982, I was vitising my home town in Japan while assigned in USAF when I met another man in the nearby Honda shop who knew a lot about CB750 prototypes. He said that there were four prototype bikes and 7 prototype engines. The black and white photo with drum brake you see looks like the same one Mr. Bob Hansen had and it was colored in cloud silver, the same color CL77 carried, not the candy gold that one might think, and there are too many details for me to list but I took some of that information and printed a short CB750 identification guide in my Tigers of Terra V2#4 comic book issue that was published about a dozen years ago and recently reprinted in the Angels 750 comic book series. You can find both titles in Googles, Amazon or even Ebay. I need to make an update though because I'm currently making two CB750 prototype replicas, complete with two different side covers. I'm also building what I believe to be a genuine CB750 K0 (1969 and 1970 models with single throttle cable is a CB750, not CB750K0 as American Honda misidentifies. They only made about 121 CB750K0s, which were an intermidiate model between CB750 and CB750K1. It had the CB750 engine and body (mostly in candly gold color) with CB750K1 throttle links and also had a black K1 type taillight bracket. Most were shipped to England.  Interestingly I also have a completely stock brown 1972 CB750K2 which I bought over a dpzen years ago from the same dealer in Las Vegas. I also discovered that one of the early CB750s I bought turned out to be a former CR750 converted to a drag bike! I'm in a process of reconverting back to CR750 specs, complete with Dick Mann colored fairing but since that'll be very expensive, I may have to cut corners to complete them earlier. I can always get genuine parts later, if they're available. I still would like to get more information about the CB750 prototypes so I can build a third replica.
« Last Edit: March 01, 2006, 12:41:03 PM by Ted Nomura »
1969 Honda CB750, two 1970 CB750, two 1972 CB750K2, 1971 CB500, 1975 CB550, 1976 CB400F, 1968 CL450, 1973 CL450, 1974 CB450, 1970 1/2 SL350K1, 1971 SL350K1, 1972 SL350K2, 1972 CL350, 1972 CB350, 1983 CB1000C, 1976 Kawasaki KZ900A4, 1976 KH500A8, 1979 KZ400B, 1983 ZN1300, and so on and so on...

Offline Ted Nomura

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Re: Prototype CB750 Pictures
« Reply #11 on: February 15, 2006, 12:41:08 PM »
Ted,

Have you looked at the information on www.sohc4.net about this bike?  Can you read Japanese?  Would you care to comment on the information in that article and the pictures and can I post your comments to the web site to go with that prototype article?  I was sent this information by Joe Broussard a long time ago and then, years later, had a message from someone in Germany who told me that this was not the prototype bike, but never elaborated.  What you have written here is great.  You will also see that I have some early articles on the CB750 that show early examples on the test track.  These are also in the 750 section and were received very recently from an SOHC/4 member with a large collection of old bike mags.

Glenn

Glenn,
I just looked at the www.sohc4.com article that you mentioned and that blue CB750 with CB450 type tank is definitely not a prototype. It doesn't have none of the prototype engine features and the frame doesn't even have a prototype side cover mounts. Detail on the side cover emblem is wrong, as I said earlier, it's too large and Honda wing emblem is off angle, among with others. The carburator is not prototype type which looked more like the one used in 1977-78 CB750Ks with dual throttle cables.  And as I said before, prototypes had no kill switch. The oil tank is standard type with a wrong cap. I could go on and on. This bike looks like the same one that was shown in North California about a decade ago with CB450 drum brakes. The Japanese article is not detailed enough to read but the serial numbers seem to be 100035 for the frame and 100037 for the engine which puts in an early production sandcast (or more accurately, gravity cast) model. It should be reconverted back to standard CB750 specs because this must be one of the earliest production CB750 in U.S.
« Last Edit: March 01, 2006, 12:41:50 PM by Ted Nomura »
1969 Honda CB750, two 1970 CB750, two 1972 CB750K2, 1971 CB500, 1975 CB550, 1976 CB400F, 1968 CL450, 1973 CL450, 1974 CB450, 1970 1/2 SL350K1, 1971 SL350K1, 1972 SL350K2, 1972 CL350, 1972 CB350, 1983 CB1000C, 1976 Kawasaki KZ900A4, 1976 KH500A8, 1979 KZ400B, 1983 ZN1300, and so on and so on...

Offline Ted Nomura

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Re: Prototype CB750 Pictures
« Reply #12 on: February 25, 2006, 01:37:05 PM »
These are the only pictures I've found of the prototype CB750, are there any more out there?


You can also find the original CB750 pictures in Don Emde's Motorcycle Collector Magazine Volume 1 issue #4. The black and white photo came from Mr. Bob Hansen (who prepared Dick Mann's 1970 Daytona winning CR750), there are two more angles. I wonder if Mr. Hansen have more, he said he got a "handful" of photos from Honda in September 1968.
1969 Honda CB750, two 1970 CB750, two 1972 CB750K2, 1971 CB500, 1975 CB550, 1976 CB400F, 1968 CL450, 1973 CL450, 1974 CB450, 1970 1/2 SL350K1, 1971 SL350K1, 1972 SL350K2, 1972 CL350, 1972 CB350, 1983 CB1000C, 1976 Kawasaki KZ900A4, 1976 KH500A8, 1979 KZ400B, 1983 ZN1300, and so on and so on...

Offline Ted Nomura

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Re: Prototype CB750 Pictures
« Reply #13 on: July 05, 2008, 01:27:22 PM »
I heard that the two pre-production CB750s displayed in Las Vegas Convention Center back in January 1969 were green and red. I wonder what happened to them. I know that the gold colored pre-production CB750 in England still exists. Any updates?

Also is there any info on the new Retro CB750? I saw the photo with silver tank (no chrome bottom trim, like the 1970 CB450) and DOHC engine. Is that in production? I still prefer the classic SOHC look. If they still make 250cc Rebel version of the old CM185 TwinStar engine of the 1970s, why not SOHC 750 four?
« Last Edit: July 05, 2008, 01:32:35 PM by Ted Nomura »
1969 Honda CB750, two 1970 CB750, two 1972 CB750K2, 1971 CB500, 1975 CB550, 1976 CB400F, 1968 CL450, 1973 CL450, 1974 CB450, 1970 1/2 SL350K1, 1971 SL350K1, 1972 SL350K2, 1972 CL350, 1972 CB350, 1983 CB1000C, 1976 Kawasaki KZ900A4, 1976 KH500A8, 1979 KZ400B, 1983 ZN1300, and so on and so on...

Offline Jonesy

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Re: Prototype CB750 Pictures
« Reply #14 on: July 05, 2008, 06:44:58 PM »
The new CB750 prototype was rumored to be displayed at the Tokyo motor show last year, but the show came and went, with no new CB750  :'( :'( :'(
"Every time I start thinking the world is all bad, then I start seeing people out there having a good time on motorcycles; it makes me take another look." -Steve McQueen

Offline toycollector10

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Re: Prototype CB750 Pictures
« Reply #15 on: July 05, 2008, 10:47:50 PM »
One of my interests is collecting old bike magazines. I've posted these before but here they are again in case you haven't seen them










Note the early ducktail seat


Note the seat again and the bottom tank trim, similar to the K1 and onwards.


This image is large enough to be used as a desktop background if you are interested.
1969  CB 750 K0
1973  CB175
1973  Z1 Kawasaki

Offline Shenanigans

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Re: Prototype CB750 Pictures
« Reply #16 on: July 05, 2008, 10:53:04 PM »
Is that a steering damper on the bike on the "Motor Cycle World" cover?
   This pretty much sums it up.   76' CB592 cafe. 69 750 project, 03 CBR954, 75 750 super sport.

Offline seaweb11

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Re: Prototype CB750 Pictures
« Reply #17 on: July 05, 2008, 11:44:49 PM »
Cool info Ted 8)

Just picked up a couple of your 750 titles on Ebay ;D

Offline SteveD CB500F

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Re: Prototype CB750 Pictures
« Reply #18 on: July 06, 2008, 02:22:38 AM »
Ted, the mule certainly is in the UK.

A colleague knows the owner.

Watch this space...
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Offline Jonesy

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Re: Prototype CB750 Pictures
« Reply #19 on: July 06, 2008, 06:05:54 PM »
Is that a steering damper on the bike on the "Motor Cycle World" cover?

Yup... Early 750's have the mounting point on the bottom triple clamp.
"Every time I start thinking the world is all bad, then I start seeing people out there having a good time on motorcycles; it makes me take another look." -Steve McQueen

Offline Ted Nomura

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Re: Prototype CB750 Pictures
« Reply #20 on: July 07, 2008, 03:15:23 PM »
I still have that brochure with the 1968 Tokyo Motor Show displayed prototype. According to the original CB750 Owners Manual, that machine have a frame number #0000002 and engine #0000004. I hope Honda still have that machine. In the manual, they tried to handpaint the new side cover emblem design. Bit crudely I might add but that same manual have a wealth of good prototype photos.

I'm hoping that the reason why the new retro version was not displayed last year is that they are modifying it more to resemble the original 1968 prototype, perhaps with the new SOHC engine!

If Kawasaki will modify their Zephers with 4 mufflers rather than 2, I might consider buying that too. I just want to get a new bike that looks like the original CB750 or Z1 with the modern conviniences like maintenance free CDI and valve units. None of the new Hondas and Kawasakis interests me. Last time they caught my attention was when Kawasaki had their ELR specials but as a baby-boomer, 750 is still fast enough for me.
« Last Edit: July 07, 2008, 03:37:31 PM by Ted Nomura »
1969 Honda CB750, two 1970 CB750, two 1972 CB750K2, 1971 CB500, 1975 CB550, 1976 CB400F, 1968 CL450, 1973 CL450, 1974 CB450, 1970 1/2 SL350K1, 1971 SL350K1, 1972 SL350K2, 1972 CL350, 1972 CB350, 1983 CB1000C, 1976 Kawasaki KZ900A4, 1976 KH500A8, 1979 KZ400B, 1983 ZN1300, and so on and so on...

Offline Glenn Stauffer

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Re: Prototype CB750 Pictures
« Reply #21 on: July 07, 2008, 03:21:24 PM »
If any of you with all this great documentation can scan it at 600dpi, I'll add it to the collection on www.sohc4.net.  jpg or tiff files work best; the higher resolution is most important for text since I can run it through a program to extract the text which makes it easier to search, cuts page load time, etc.  I can personally scan and return anything anyone is willing to send me, but I can't be responsible for the mail service losing these hard to find items, so I don't encourage sending originals.  Good copies should scan well, but any images would lose something even if they were copied in color.

Offline SteveD CB500F

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Re: Prototype CB750 Pictures
« Reply #22 on: July 08, 2008, 01:46:33 AM »
Ted, the mule certainly is in the UK.

A colleague knows the owner.

Watch this space...

Bad news Ted.

The owner is reclusive (?) and we have been sworn to secrecy so no details on the bike other than yes it does exist and lives in England.
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Offline Ted Nomura

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Re: Prototype CB750 Pictures
« Reply #23 on: July 11, 2008, 01:24:14 PM »
That's too bad. When I saw the original photos, it had the early "short" front brake master cylinder and a slightly different gas tank with the Honda emblem little higher than the production version ( the same type as the 1968 Tokyo Motor Show CB750 version, except with a production type sandcast engine.) I think it also had the chopped vented front disc. I hope the owner is bringing it to original condition, which would make it as one of the most valuable Honda made.
1969 Honda CB750, two 1970 CB750, two 1972 CB750K2, 1971 CB500, 1975 CB550, 1976 CB400F, 1968 CL450, 1973 CL450, 1974 CB450, 1970 1/2 SL350K1, 1971 SL350K1, 1972 SL350K2, 1972 CL350, 1972 CB350, 1983 CB1000C, 1976 Kawasaki KZ900A4, 1976 KH500A8, 1979 KZ400B, 1983 ZN1300, and so on and so on...

Offline 754

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Re: Prototype CB750 Pictures
« Reply #24 on: July 11, 2008, 08:29:19 PM »
Has ANYONE reading these posts EVER seen an early CB750 since 1970 that has center bolts on the end of valvecover, or a steering damper factory mounted..??..I mean in the flesh..
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