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.
The average top speed for a 450cc motocross bike typically ranges between 85 to 100 mph (137 to 161 km/h). Factors such as bike model, rider weight, terrain, and modifications can influence this speed. These bikes are designed for agility and acceleration rather than just raw top speed, making them suitable for competitive racing and off-road conditions.
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
A 125cc dirt bike generally hits a top speed of 60 mph. Consider this a top speed when racing Motocross or riding trails on a hardpack straightaway - the ideal setting for a dirt bike. However, if you must, on paved roads expect to hit close to 70 mph.
The Yamaha YZ 85 is equipped with a 6-speed transmission. This allows for a range of gear ratios to optimize performance for various riding conditions. The 6-speed design is typical for motocross bikes in this class, providing a good balance of acceleration and top speed.
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.
The Yamaha YZ250F has a top speed of around 80-85 mph, depending on various factors such as rider weight, terrain, and modifications to the bike. It is a high-performance dirt bike designed for motocross and off-road racing, where acceleration and agility are more important than top speed.
It depends on if you mean quick off the line or top end speed the honda cr is notoriously quick especially with power bands and a smaller back sprocket but for top end speed you need a four stroke
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.