MIKUNI Main Jet #640 - 4-Pack 4/042-640
Part Number: KM4042640MIKUNI
- SKU:
- KM4042640
- MPN:
- 4/042-640
- Condition:
- New
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
Description
Precise jetting is fundamental to carburetor tuning—undersized or oversized main jets compromise throttle response, fuel efficiency, and engine longevity. The MIKUNI #640 main jet delivers the calibrated fuel flow your engine demands across the mid-to-high RPM range, whether you're fine-tuning a stock rebuild or dialing in a modified setup. This 4-pack ensures you have spares on hand and the flexibility to experiment with jetting for different riding conditions or altitude changes.
Manufactured in Japan to OEM tolerances, these jets are precision-drilled and sized to exacting standards—there's no guesswork when you're running genuine MIKUNI components. If your carb originally came with a 4/042 main jet and needs rejetting, this #640 step offers a proven upgrade path for improved atomization and combustion efficiency.
- Quantity: 4-pack
- Jet Size: #640
- Manufacturer: MIKUNI
- Compatibility: VM18 clamp-on carburetors
- Compatibility: VM24-512 carburetors
- Compatibility: VM26-512 carburetors
- Compatibility: VM26-606 carburetors
- Compatibility: TMX Series carburetors
- OEM Replacement: 4/042 jets
- Construction: Precision-drilled
- Origin: Made in Japan
- Installation: Bolt-in replacement
- Note: Verify fitment before ordering
Specs
OVERALL LENGTH: |
12 MM (0,47') |
RIDING STYLE: |
ATV |
RIDING STYLE: |
OFF-ROAD |
FEATURES: |
FOR VM CARBURETORS |
JET SIZE: |
640 |
OVERALL DIAMETER: |
6,00 MM (0,24') |
OVERALL DIAMETER IMPERIAL: |
0.24' |
OVERALL LENGTH IMPERIAL: |
0.47' |
HEAD TYPE: |
HEX HEAD |
MATERIAL: |
BRASS |
OVERALL LENGTH METRIC: |
12 MM |
RIDING STYLE: |
ADVENTURE TOURING / DUAL-SPORT |
UNITS: |
4 PACK |
OVERALL DIAMETER METRIC: |
6.00 MM |
PRODUCT NAME: |
JET |
RIDING STYLE: |
SNOW |
RIDING STYLE: |
STREET |
RIDING STYLE: |
UTV |
TYPE: |
MAIN |
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