The same way you'd improve any other bike. Go to a dirt bike part superstore online or something and look around and see what fits your bike. They usually tell you if stuff fits or not.
practice...
no the 1985 kx 125 cylinder will only fit years 85-87 kx 125s
no i have a 2000 yz 125 and can beat a kx 125 blind folded
Yes
Kawasaki kx 125 is the best
The seat height on a 1991 kx 125 is 37.1 inches
kx 125 is better because KTM 125 or any ktm snap so go with kx 125
No it won't only 1999-2002
kawasaki dirt bike.
about 70mph
No you cant.
KTM 125