One can only guess in this case whether this design was all created at the GMZ or whether Nahum Goodkin, its creator, could use some of the results from the remaining M-75 engines. It looks as if this second option is closer to the truth, because the centralization of the motorcycle industry in the USSR made it possible to transfer technology and whole builds from one plant to another.
The M-80 had the same running gear as М-72, and it was only somewhat changed and made more light-weight. The engine also resembled that of M-72 quite a lot, the only difference being that its cylinders and overhead valve ends replicated the BMW R75 structure.
М-72 from «Motorworld by V.Sheynov» collection
BMW R75 from «Motorworld by V.Sheynov» collection
Several samples of M-80 were manufactured, and they participated in competitions in the late 1940s (some remaining photographs bear evidence of this fact). In the summer of 1947 a famous racer Yevgueni Gringaut, the USSR Merited Master of Sports, set an absolute record on one of the M-80s: 172 km/h.
|Manufacturer||Gorky Motorcycle Plant, Gorky (USSR)|
|Years of manufacture||1946|
|Quantity produced, units||5|
|ENGINE AND TRANSMISSION|
|Engine capacity, cc||746|
|Bore and stroke, mm||78 x 78|
|Engine rating||40 h.p. at 6000 rpm|
|Carburetor||К-37 – 2 units|
|FRAME AND WHEELBASE|
|Frame type||Steel, tubular|
|Wheel size||Front wheel: 21 inches
Rear wheel: 20 inches
|Ground clearance, mm||
|Seat height, mm||
|Gas tank size, l|
|Maximum speed, km/h||