PRIMA 5MM CVK MAIN JET KIT
GY6 125cc / 150cc / CN250

10-PIECE KIT • #100–#140

Prima 5mm main jet kit for tuning compatible GY6 and CN250 CVK carburetors. Great for rejetting after intake, air filter, exhaust or other performance modifications.

JET SIZES INCLUDED

#100 • #105 • #108 • #110 • #113
#115 • #120 • #125 • #130 • #140

SPECIFICATIONS

• Brand: Prima
• Keihin Round-Style Main Jets
• Thread Size: M5 x 0.80
• Overall Length: 8mm
• Quantity: 10 Jets

COMMON APPLICATIONS

Fits many GY6 125cc, 150cc and 169cc CVK carburetor applications, including:

152QMI • 157QMJ • 161QMK • 1P57QMJ
YN1P57QMJ • BN157QMJ • BN161QMK-A
1P61QMK • JJ157QMJ

Also fits compatible CN250 CVK carburetor applications.

JETTING INFO

• Larger jet number = more fuel / richer mixture
• Smaller jet number = less fuel / leaner mixture

Rejetting may be needed after installing a performance exhaust, high-flow air filter, modified intake or other engine upgrades. Altitude and temperature can also affect proper jetting.

TUNING TIP

When unsure of the correct main jet, generally start slightly richer and work down in small steps while checking engine performance.

IMPORTANT FITMENT NOTE

Please compare your existing jet before ordering. This kit uses 5mm Keihin round-style jets with M5 x 0.80 threads and an overall length of approximately 8mm.

Engine size alone does not guarantee fitment, especially with aftermarket carburetors.

PACKAGE CONTENTS

• 10 Prima 5mm Main Jets
• Sizes #100 through #140 as listed above

Packaging may vary.