These kits include 3 Pilot Jet ( #42.5 #45 #47.5 ), 5 Main Jets ( #152.5 #155 #157.5 #160 #162.5 ) and two needle shims for your carburetor.
Multi Stage is for those experimenting with different engine, air intake and exhaust systems
Modifications to the air intake and/or Exhaust system to your ATV will change the air/fuel mixture to your carburetors causing a lean running condition.
Jet Kits will compensate for the lean running condition.
Lean running conditions can destroy your engine and decreases overall performance.
Jet kits are easy to install but does require some basic carburetor tuning knowledge.
Refer to your shop manual for carburetor removal and jet installation.