you should get big bore kit, after market carb a couple sizes bigger than stock, an after maket exhaust, and make a couple holes in the airbox. if you want to gear it lower to get more low end power get a 52 tooth sprocket or if you want more top end you can get a50 tooth sprocket.( 51 tooth is stock).For the 140l you can also get kx 100 forks to make a better suspension and maybe even kx 100 back shock. you can also get a lighter battery and tune the carb right. tuning the carb right is everything. new bars will also increase handeling.
Hands down a klx 140!
The klx 140 uses sae 10w-40 oil
35 to 45mph
+/-55mph mph
75 mph.
80km an hour is awesome
No
yz 85 will smoke it!!
it ranges from 1,000-2,000 dollars
it takes about 1.3 gallons
It goes around 55-65 at the most.
I think a klx 140 p.s. It is a kawasaki