the speed depends on how well tuned the bike is and also the size of the engine.
60-65 tops with stock gearing, a motocross bike is not about top speed but how quick and how well it handles.
I ride a in motocross,I'm 13 years of age and I live in Murray bridge ,ride a 07 Honda cr125 ,when your in motocross,and if you have sponsor you get tones of cool things for your bike.my bikes top speed is about 124.8mph and has about 43.3 hp.So a 07 Yamaha yz125's top speed would be about 124.9mph and its hp would be about 43.4. BUT THAT'S IF YOUR IN MOTOCROSS! My name is Cale humphreys im in mx my mobile number is 0450434982. Some of you might know Dylan vansarti, Joel vansarti they are my cousins and there farthers name is Carl vansarti "Dylan and Joel are both in motocross aswell. You lie to much-from gavin cason my number is 2374340
Your top gear or last gear you shift to. Depending on what make and model of your bike, either 4th or 5th on motocross bikes and for woods bikes it would be 5th or 6th.
from my experience in racing pit bikes ive messured a tt-r 80cc to go around 100mph going up hill and flat road 140mph
cc=cubic centimeter= displacement=the amount of area displaced between the bottom of the stroke and top of the stroke of the piston.
It used to be Road racing and Flat tracking for two wheel racing, but motocross, and supercross have blown them out of the water. As for comparing 2 wheels to 4 wheels I think it would be Nascar 1st, motocross/supercross 2nd, Champ/Indi cars 3rd. All other racing, 2 or 4 wheels, its a toss-up after these top three. (I'm refering only to the U.S.A.)
The YZ series was built to race motocross and top speed was not a major factor. Handling and acceleration were key. The top speed of any motorcycle can be adjusted by changing sprocket sizes.
In 2009, MotoGP bikes ( 800 cc ) top speed is around 343 km/hr. with Casey Stoner's Ducati. Super Bikes ( 1000 - 1198 cc ) rarely reach 320 km/hr.
+ 85 mph they are very good bikes
TOP SPEED is a speed rating of a horse for its previous races.
Who cares !! Snowboarding is a waste of time
The 2013 Yamaha YZ85 is a mini motorcycle specially designed for off-road and Motocross racing. Images of the Yamaha YZ85 can be found on the Top Speed, Total Motorcycle or Yamaha's own website.