Seized Piston and or Crank, take the exhaust off and feel into the bore it there are metal shavings your piston is seized. The top end will need to be rebuilt, pull the top end remove the piston and connecting rod and push the kickstart down. If it remains locked the crank is seized as well, you can split the case and rebuild it but, it would be cheaper to buy a complete motor.
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
As a starter bike yes, but an experienced rider will want a 125 or 250.
There should be a Phillips Screw on the side by the kick start remove screw and fill until oil comes out
No you cant.
kawasaki dirt bike.
about 70mph