TroubleShooting Guide

Trouble Shooting Chart


Quad won’t start after a crash:

Pilot too lean

Idle set too high

Improper starting procedure

Flooded Carb


Quad runs on or won’t idle down when throttle is chopped:

Idle set too high

Air leak intake or engine

Pilot too rich (when bike is hot)


Quad won’t start when cold outside:

Pilot jet too lean

Air filter is over-oiled

Motor oil too thick for temperature


Quad sputters/won’t clean out at high RPM:

Main jet too rich

Air filter is over-oiled

Spark plug has debris on electrode


Quad coughs and stalls in slow turns:

Pilot too lean

Idle set too low


Quad hesitates or bogs over deep whoops or G-outs:

Float level too low

Carb vent tubes blocked

Main jet splash shield not installed

Float level too high, gas is trapped in vent tubes (install T-vents)


Quad starts but won’t take throttle without sputtering:

Pilot jet too rich

Water in fuel

Debris in main jet

Quad suddenly starts sputtering/gas flows from vent tubes:


Stuck float check valve

Debris in gas or carb


Quad runs hot/feels slow and flat on straights:

Main jet is too lean

Fuel octane low, causing detonation


Quad coughs and stalls when you wick open throttle:

Needle too lean

Slide cutaway too lean

Pumper circuit blocked or too lean.