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Guazzoni 50cc racer. 6 speed disc valve

 

Guazzoni "Matta" (1968); Italian 50cc production racer; 2 stroke with rotary valve inlet; bore x stroke 41x37.5; 4-speed gearbox (6-speed was optional available) of the "cassette-type" (quickly removable from the side); max power 8 hp@ 10.500 rpm (standard).

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(btw. my info sais it's a 60 cc...)

67651[/snapback]

 

Thanks. Odd about the capacity. I just calculated it from the bore and stroke and it came out at 49.5, but maybe you have a later model info or something. I didn't find your particular photo, or indeed one with the fairing off, but the disc valve and rearwards exhaust port are fairly unique.

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