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it depends on the bike, some will only go 50mph, while some will hit 80mph, it depends on the bike.
125cc's go 70-90mph
Depending on make and gearing anywhere from 60-70 mph
well i have an rm 125 and that go's 60 to 75 mph it all depends if it's 2 or 4stroke a 4 stroke has better top end a 2 stroke is quiker out the start but id say 60-75.
Depends on make and gearing from 60-70 mph

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6y ago
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12y ago

A properly tuned 125 cc racing kart will do over 60 mph.

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12y ago

The top recorded speed of a 125cc Moto Gp bike was set by Valentino Rossi in 1996, aboard his Aprilia at 155.193mph.

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15y ago

about 70-75

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