The Story of The CB750 Prototype — The SOHC/4 Owners Club

19 Apr 2015 | Author: | Comments Off on The Story of The CB750 Prototype — The SOHC/4 Owners Club
Honda CB1300 Prototype

The CB750 Prototype

Robert Brooks, running a motorcycle shop called Bikesurus near Los Angeles, California. is a real motorcycle enthusiast. Early Japanese multi-cylinder bikes, such as CB, Z, etc. in his shop are the proof of his passion to motorcycles.

One day, he found a strange CB750 four at the junk yard by chance. The CB wasn’t in good condition, however, he had never seen the kind of CB before. Sure, the CB he saw is a rare prototype CB which usually can’t be survived for a long time. He did know about the prototype CB introduced in 1968 by one of the Japanese bike magazine.

He also saw the picture of the prototype-CB with a CB450K1′s fuel tank for camouflage running on test track in Tokyo, Japan. Holly s***, the bike was then in front of him! He of course started negotiating with the owner of the bike. However the owner was die-hard if he knew anything about the bike or not.

After lots of visits to the junk yard, he finally could manage to get the prototype-CB.

According to Brooks, he restored the bike in stock condition with 99% genuine Honda parts. Of course, he did use bolts, well-known among CB enthusiast, with punched seal ” 8 ” on its head.(??) Also a color scheme and some other details were completely restored in original condition. The most interesting point on the bike is that the bike is made up with both special parts for the prototypes and regular parts for K0 and later.

Honda News, July 28th, 1969, says that Honda started to export CB750 four to the U.S. in April, 1969. Another information in the states says it was July in 1969 that all Honda dealers in the U.S. got ready to sell CB750. In fact, the prototype-CB has its original title registered in June, 1969.

Honda CB1300 Prototype

In Spring, 1969, Honda already introduced a K0 to the Japanese press, and this means that the style of K0 was completed by the time. Brooks assumes that the bike was used for the pre-sales-demo to major Honda dealer in the U.S. according to his own research. However, the truth is still unknown. By the way, in 1968, when Honda started the development project of CB, the prototype was actually tested in the U.S. too. Because the U.S. is Honda’s main target market outside of Japan.

Soichiro Honda got all control on any motorcycles made in 1960s. Whenever he thought any change should be made, he did make it, even a bike was under development or just before the shipping.

About the picture: Early prototype is running on the Arakawa test course, Tokyo, Japan, 1968. Fuel tank and F R drum brake is from CB450K1. In Oct, 1968, just before Tokyo Motor Show, Honda decided to install a front disk brake on CBs.

There is some testing devices on the fuel tank. A cowling was also tested. This tells the potential of CB was really high.

Honda CB1300 Prototype


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