The different jets effect different throttle positions:
- Zero throttle to 1/4 throttle = Pilot Jet and A/F Mixture Screw.
- 1/4 to 1/2 throttle = Throttle Valve (aka Slide)
- 1/2 to 3/4 throttle = Needle
- 3/4 to Full throttle = Needle + Main Jet
What is Bogging?
When a dirt bike bogs, it simply means it’s not getting enough fuel and the engine sputters or stalls at full throttle. There are two common types of bogging: lean bog and rich bog, distinguishable by how the bike sounds when you throttle.
Lean Bog - Happens when there’s too much air and not enough fuel in the engine. A lean bog is noticeable when the bike doesn’t accelerate, and sounds like the engine is drowning out or dying.
Rich Bog - Happens when there’s too much fuel on acceleration. The throttle response feels sluggish. A rich bog makes the engine sound like it’s sputtering.
From: https://www.partzilla.com/blog/why-dirt-bike-bogs-4-common-causes
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