no its not
the top end speed is 65mph.
kx 100 is faster on bottom end speed kx 85 is faster on top end speed so they are about equal to some extent. ;)
a yz 85 because it has a big top end
A 70cc dirt bike will achieve a top speed of around 40mph
around $500 to have someone do it and around $200 to $300 to do it yourself
no compression (easy to push kick starter down)
The top speed of a mini dirt bike with a 49cc engine is typically around 25-30 miles per hour. However, this can vary depending on factors such as rider weight, terrain, and maintenance of the bike.
80mph
You can use a smaller chain sprocket to get more top end but at the expense of loosing a little bottom end.
A 70cc dirt bike will achieve a top speed of around 40mph
Suzuki and Kawasaki are top on the list.