Im fairly new to this hobby and I purchased a nitro buggy with a .16 engine that lately my engine has been bogging at full throttle so I richened out the hsn but now I feel my buggy isnt going as fast as it used to. Any help on how to correctly tune a nitro engine.

you went the wrong way, you need to lean it to get more power.

counter clockwise= richen, more fuel, less power more lube

clockwise=less fuel more power and less lube

If it is bogging that means it has too much fuel so you should lean it out for less fuel.

http://www.youtube.com/watch?v=k4WbE...15RVAAAAAAAAAA

Trow ay new plug n ere 2

Trust me a 8$ plug will fix it .if not check your compression