How do you adjust a carbuetor on a 1996 klx 125?

What should you do if your klx 140 is to slow?

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.