Dirt Bike Carburertor Main Jets
Dirt Bike Carburetor Main Jets & Jet Needles for Mikuni Carbs on Honda, Yamaha & KTM at JJ Motorsports
Fine-tune your dirt bike's fuel mixture for optimal power and efficiency with premium carburetor main jets and jet needles from JJ Motorsports. Our selection includes high-precision brass main jets (sizes 100-140) and tapered jet needles designed for consistent mid-range performance, smooth throttle response, and easy tuning in motocross, enduro, and trail riding. Compatible with Mikuni VM series carbs on popular models like Honda CRF, Yamaha YZ/WR, Kawasaki KX, Suzuki RM, and KTM SX/EXC, these Japanese-made components ensure accurate metering, reduced lean spots, and reliable operation in dusty, high-RPM conditions. From 4/042 main jets for VM18/26 carbs to J8-series needles for mid-throttle control, stock up on the parts needed for a full carb rebuild or jetting upgrade.
Shop trusted brands like Mikuni for OEM-quality precision. Explore related categories such as dirt bike carburetor rebuild kits for complete maintenance or dirt bike air and fuel for reeds and filters.
Top Dirt Bike Carburetor Main Jets & Needles
- Mikuni Jet Needle J8-6F08 – Precision tapered jet needle for mid-range fuel control in Mikuni VM series carbs; fits various OE applications, made in Japan for smooth throttle response.
- Mikuni Main Jet #100 - 4-Pack (4/042-100) – Brass main jet pack for VM18, VM24/26, TMX carbs; 6mm diameter, 12mm length, ideal for leaner mixtures in dirt bikes.
- Mikuni Main Jet #125 - 4-Pack (4/042-125) – High-flow brass jets for richer high-RPM tuning; compatible with Mikuni VM series and OE carbs on Honda, Yamaha, and KTM models.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
MIKUNI Needle Jet 785-24001-Q-0
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance requires precision components engineered for exact air-fuel ratios. The MIKUNI Needle Jet 785-24001-Q-0 is a genuine Mikuni part that gives you direct control over throttle response in the critical 1/4...389Q0- SKU:
- 389Q0
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- UNITS:
- EACH
- JET SIZE:
- Q-0
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- NEEDLE
- FEATURES:
- FOR TM 32 MM - 33 MM SPIGOT
- MATERIAL:
- BRASS
- MODEL:
- TYPE 389
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
$15.49 -
MIKUNI Needle Jet 785-24001-Q-2
MIKUNI
$15.49Precise mid-range fuel delivery is the foundation of a well-tuned carburetor, and the MIKUNI Needle Jet 785-24001-Q-2 gives you direct control over that critical zone. Whether you're chasing optimal throttle response or compensating for altitude and...389Q2- SKU:
- 389Q2
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- TYPE:
- NEEDLE
- JET SIZE:
- Q-2
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- FEATURES:
- FOR TM 32 MM - 33 MM SPIGOT
- MODEL:
- TYPE 389
$15.49 -
MIKUNI Needle Jet 785-24001-Q-4
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance requires precision components that respond to your specific jetting needs. The MIKUNI Needle Jet 785-24001-Q-4 gives you direct control over fuel delivery in the critical 1/4 to 3/4 throttle range—where...389Q4- SKU:
- 389Q4
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- FEATURES:
- FOR TM 32 MM - 33 MM SPIGOT
- MATERIAL:
- BRASS
- MODEL:
- TYPE 389
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- JET SIZE:
- Q-4
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
$15.49Qty in Cart: 0Quantity:Price:$15.49Subtotal: -
MIKUNI Main Jet #170 - 4-Pack 4/042-170
MIKUNI
$14.56Precise fuel delivery is the foundation of carburetor tuning, and a properly sized main jet directly impacts your engine's power output and throttle response across the RPM band. The MIKUNI #170 main jet gives you the fuel metering you need for peak...KM4042170- SKU:
- KM4042170
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ATV
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- OVERALL LENGTH:
- 12 MM (0,47')
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- UNITS:
- 4 PACK
- FEATURES:
- FOR VM CARBURETORS
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- PRODUCT NAME:
- JET
- RIDING STYLE:
- STREET
- JET SIZE:
- 170
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
$14.56 -
MIKUNI Main Jet #220 - 4-Pack 4/042-220
MIKUNI
$14.56Precision fuel metering is critical to carburetor performance, and a worn or incorrectly sized main jet directly impacts throttle response, fuel economy, and engine reliability. The MIKUNI Main Jet #220 delivers consistent atomization across the...KM4042220- SKU:
- KM4042220
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- RIDING STYLE:
- ATV
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- OVERALL LENGTH:
- 12 MM (0,47')
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- UNITS:
- 4 PACK
- FEATURES:
- FOR VM CARBURETORS
- JET SIZE:
- 220
- PRODUCT NAME:
- JET
- RIDING STYLE:
- STREET
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
$14.56 -
MIKUNI Main Jet #240 - 4-Pack 4/042-240
MIKUNI
$5.20Precise fuel metering is fundamental to carburetor tuning, and a worn or incorrect main jet directly impacts throttle response, fuel economy, and peak power output. This OEM-spec Mikuni #240 jet delivers the exact fuel flow your engine demands across the...KM4042240- SKU:
- KM4042240
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 240
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH METRIC:
- 12 MM
- UNITS:
- 4 PACK
- FEATURES:
- FOR VM CARBURETORS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- MAIN
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$5.20 -
MIKUNI Main Jet #250 - 4-Pack 4/042-250
MIKUNI
$5.20Running the wrong main jet size kills performance and creates drivability issues—lean stumbling, flat spots, or overly rich running that wastes fuel and fouls plugs. This Mikuni #250 main jet is a direct OEM replacement engineered to restore proper...KM4042250- SKU:
- KM4042250
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- 4 PACK
- JET SIZE:
- 250
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH IMPERIAL:
- 0.47'
- FEATURES:
- FOR VM CARBURETORS
- OVERALL DIAMETER METRIC:
- 6.00 MM
- PRODUCT NAME:
- JET
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-100
MIKUNI
$5.20Precision fuel delivery at idle and low-throttle conditions is critical for carbureted engines—lean mixture and hesitation during cold starts or low-speed cruising can indicate a worn or incorrect pilot jet. The MIKUNI Super BN Series Pilot Jet delivers...KN100606100- SKU:
- KN100606100
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- PILOT
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 100
- MODEL:
- MIKUNI
- UNITS:
- 4 PACK
$5.20Qty in Cart: 0Quantity:Price:$5.20Subtotal: -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-110
MIKUNI
$14.55Precise fuel metering at idle and low-throttle conditions is critical to engine response and smooth operation—and that's where pilot jets make their mark. The MIKUNI Super BN Series Pilot Jet delivers consistent atomization and fuel delivery across a...KN100606110- SKU:
- KN100606110
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- JET
- MODEL:
- MIKUNI
- TYPE:
- PILOT
- UNITS:
- 4 PACK
- JET SIZE:
- 110
- RIDING STYLE:
- WATERCRAFT
$14.55 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N1003606-1125
MIKUNI
$5.20Fine-tuning your carburetor's idle circuit is critical for consistent cold starts, smooth off-throttle response, and reliable low-RPM performance. The MIKUNI Super BN Series Pilot Jet delivers precision fuel metering in the pilot circuit, ensuring your...KN1006061125- SKU:
- KN1006061125
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- MIKUNI
- JET SIZE:
- 112.5
- RIDING STYLE:
- WATERCRAFT
- PRODUCT NAME:
- JET
- TYPE:
- PILOT
- UNITS:
- 4 PACK
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-120
MIKUNI
$14.55Fine-tuning your carburetor's low-speed fuel delivery is critical for smooth idle quality, crisp throttle response, and consistent performance across varying engine loads. A worn or incorrect pilot jet restricts your ability to dial in the precise...KN100606120- SKU:
- KN100606120
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 120
- PRODUCT NAME:
- JET
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
$14.55 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-70
MIKUNI
$5.20Precise fuel metering at low throttle positions is essential for smooth idle quality and responsive low-end throttle transitions. A worn or incorrectly sized pilot jet creates a lean or rich condition that compromises cold starts, idle stability, and...KN10060670- SKU:
- KN10060670
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
- PRODUCT NAME:
- JET
- TYPE:
- PILOT
- UNITS:
- 4 PACK
- JET SIZE:
- 70
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-725
MIKUNI
$5.20Precise pilot jet sizing is critical for dialing in your carburetor's low-speed fuel delivery and off-idle response. The MIKUNI Super BN Series Pilot Jet delivers consistent atomization across the RPM range, preventing lean stumbles and hesitation during...KN100606725- SKU:
- KN100606725
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- MIKUNI
- UNITS:
- 4 PACK
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 72.5
- TYPE:
- PILOT
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-75
MIKUNI
$5.20Precise fuel metering at idle and low-throttle conditions directly affects engine response, fuel efficiency, and cold-start performance. The MIKUNI Super BN Series Pilot Jet delivers the calibrated fuel atomization your carbureted engine needs for...KN10060675- SKU:
- KN10060675
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 75
- PRODUCT NAME:
- JET
- TYPE:
- PILOT
- UNITS:
- 4 PACK
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-775
MIKUNI
$5.20Precise fuel metering at idle and low-throttle conditions directly impacts engine response, throttle transition quality, and cold-start performance. The MIKUNI Super BN Series Pilot Jet delivers the exacting fuel atomization your carbureted engine...KN100606775- SKU:
- KN100606775
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 77.5
- MODEL:
- MIKUNI
- TYPE:
- PILOT
- UNITS:
- 4 PACK
- PRODUCT NAME:
- JET
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-80
MIKUNI
$5.20Proper pilot jet sizing is fundamental to carburetor tuning—it directly controls fuel delivery at idle and low-throttle conditions, where engine responsiveness and fuel efficiency are established. If your carb is running rich or lean at cruise, a...KN10060680- SKU:
- KN10060680
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- PILOT
- JET SIZE:
- 80
- PRODUCT NAME:
- JET
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-825
MIKUNI
$5.20Precise fuel metering at idle and low-load conditions is essential for clean throttle response and stable engine behavior across varying operating temperatures. The MIKUNI Super BN Series Pilot Jet delivers repeatable, accurate atomization in the pilot...KN100606825- SKU:
- KN100606825
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 82.5
- PRODUCT NAME:
- JET
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
$5.20Qty in Cart: 0Quantity:Price:$5.20Subtotal: -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-85
MIKUNI
$5.20Carburetor tuning requires precision, and the MIKUNI Super BN Series Pilot Jet delivers the exact fuel metering your engine needs at idle and low-rpm operation. A worn or incorrectly sized pilot jet causes stumbling, hesitation, and poor throttle...KN10060685- SKU:
- KN10060685
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
- JET SIZE:
- 85
$5.20Qty in Cart: 0Quantity:Price:$5.20Subtotal: -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-875
MIKUNI
$5.20Precise fuel metering at idle and low-RPM cruising is critical to engine response and fuel efficiency. The MIKUNI Super BN Series Pilot Jet delivers accurate atomization in the pilot circuit, eliminating lean stumbles and ensuring smooth throttle...KN100606875- SKU:
- KN100606875
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 87.5
- UNITS:
- 4 PACK
- TYPE:
- PILOT
$5.20 -
MIKUNI Needle Jet VM38/41-P-8
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance requires precision, and the MIKUNI Needle Jet VM38/41-P-8 delivers exactly that. This genuine Mikuni component allows you to dial in your air-fuel mixture across the critical 1/4 to 3/4 throttle...247P8- SKU:
- 247P8
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- JET SIZE:
- P-8
- MODEL:
- TYPE 247
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- TYPE:
- NEEDLE
- UNITS:
- EACH
- FEATURES:
- FOR OE YAMAHA
- RIDING STYLE:
- STREET
$15.49
