Select Your Ride

1
2
3

MIKUNI Main Jet #90 - 4-Pack 4/042-90

Part Number: KM404290
MIKUNI
(No reviews yet) Write a Review
SKU:
KM404290
MPN:
4/042-90
Condition:
New
Availability:
Ships Same Business Day
Weight:
0.05 LBS
$14.56
Prop 65 Warning Prop 65 Warning cancer & reproductive harm Price Match Call for more info on price match does not include 3rd party ads
Frequently bought together:

Description

Proper jetting is the foundation of carburetor tuning—get it wrong, and you're leaving horsepower on the table or risking lean-condition damage. The MIKUNI Main Jet #90 delivers the precise fuel metering your engine needs for optimal performance across your power band. This 4-pack ensures you have spares on hand for testing, rebuilds, and quick adjustments without downtime.

If you're running a Mikuni VM or TMX series carburetor, these jets are a direct replacement that requires no modifications—simply swap and tune. Whether you're dialing in a 2-stroke dirt bike, ATV, or small-displacement performance engine, nailing the right jet size makes the difference between a crisp throttle response and a bogged-out bog.

  • Quantity: 4-pack
  • Jet Size: #90 main
  • MPN: 4/042-90
  • Fits: VM18, VM24-512, VM26-512, VM26-606, TMX series
  • Material: Precision-machined brass
  • Origin: Made in Japan
  • Installation: Bolt-in, no modifications
  • Application: Carburetor tuning, jetting optimization
View AllClose

Specs

JET SIZE:
90
OVERALL DIAMETER METRIC:
6.00 MM
OVERALL LENGTH:
12 MM (0,47')
RIDING STYLE:
OFF-ROAD
PRODUCT NAME:
JET
RIDING STYLE:
ADVENTURE TOURING / DUAL-SPORT
RIDING STYLE:
ATV
RIDING STYLE:
STREET
TYPE:
MAIN
HEAD TYPE:
HEX HEAD
MATERIAL:
BRASS
OVERALL DIAMETER:
6,00 MM (0,24')
OVERALL DIAMETER IMPERIAL:
0.24'
OVERALL LENGTH IMPERIAL:
0.47'
RIDING STYLE:
SNOW
RIDING STYLE:
UTV
UNITS:
4 PACK
FEATURES:
FOR VM CARBURETORS
OVERALL LENGTH METRIC:
12 MM
View AllClose

0 Reviews

View AllClose

Fitment

Fitment for MIKUNI Main Jet #90 - 4-Pack 4/042-90

View AllClose

FREE Shipping on orders of $99 or more!


Commercial Accounts

We offer tax-free commercial accounts, providing businesses with significant savings and streamlined benefits.



Easy 30-Day Returns

We proudly offer 30-day easy returns, ensuring a hassle-free and convenient shopping experience for our customers.


You May Also Like

Big Power, Nice Sound!

Picked up a Pro Circuit pipe and silencer for my YZ125 it’s a game changer. The power feels way better and the sound is awesome.

Tyler D. - 06/12

Perfect Fit

First time ordering here and dang y’all knocked it outta the park! The wheels fit my Ranger UTV perfect, and I’ll definitely be back for more 5 stars all day!

Sarah L. - 08/24

Fast Shipping!!

Ordered on a Monday, and it was on my doorstep by Wednesday! Super impressed with how fast the shipping was.

Jason P. - 09/13

Helps keep cool, works great!

Bought the dual pass Allstar radiator for my build, and it’s been solid. Keeps the engine running cool even on the hottest days no complaints here!

Jake M. - 05/21

SECURE & SAFE PAYMENT

EASY RETURNS

FAST DELIVERY

AUTHORIZED DEALER