it depends on the year, condition, aftermarket parts, and everything about it
The 110.
YZ85's are actually an exceptional bike.. but you have to stay on top of the maintenance.
go to a local dirt bike shop and explain the problem to them dirt bike stores always have mechanics to help
None for real
maybe 60mph
a yz 85 because it has a big top end
kx 100 is faster on bottom end speed kx 85 is faster on top end speed so they are about equal to some extent. ;)
arond 80-85 mph
About 85 90 mph
Around 80-85 pounds of torque.
The spot for a triangle stand for an RM 85 is by the swingarm on the left side of the dirt bike.
you can use lucas fourstroke oil