We now know that this is not a Kyokuto, so what is the mystery twin cylinder engine in this Autoracer? It's a Toyo. Take a look at the image below and compare, this is a twin cylinder, DOHC Toyo with a 4-valve head... Thanks to Bennie Ludolphy in Hollland for his valuable information.
I've dug out my old silver halide images and scanned in a photograph of a genuine 1971 Kyokuto KT2 engine to compare and it is clearly very different.
This particular engine has been fitted into a 1970s Jawa speedway rolling chassis and is a replica of the bike that was tested at Canterbury speedway in 1972. A similar set-up was also tested in Australia in a Hagon Chassis. The engine has been modified to run on methanol with the addition of an amal carburettor. The engine and chassis were restored by ace speedway collector, sometime poet and ex-Berwick rider Ian Paterson and form part of his magnificent Cinder to Shale collection. Ian also has a genuine HKS Hasegawa Auto Race bike in his collection (see below). This bike dates from the early 1980s and is similar to the bike Barry Briggs had on display at the old Speedway collection at Donington Park.
Finally, I have to apologise for the poor quality of this image, but this is the only picture I have ever found of an EiCoH Auto Race bike....
EiCoH, or Engine Company Honda to give it its full name, was a side project of Kazuo Honda, one of the family members behind the Kyokuto. Kazuo was also developing the JRM (Japanese Race Motor) for road racing at the same time. The EiCoH was a 500cc single based on his families KT2 unit but with some modifications. This photo from a Dutch magazine shows the complete 1967 EiCoH speedway bike, basically an Auto Race machine without the asymetric bars!