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 990-793-003-P-4
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance—where most of your throttle input happens—requires precision components that won't compromise your engine's responsiveness. The MIKUNI Needle Jet 990-793-003-P-4 is a genuine Mikuni component designed...166P4- SKU:
- 166P4
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- BRASS
- MODEL:
- TYPE 166
- RIDING STYLE:
- ATV
- JET SIZE:
- P-4
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- FEATURES:
- FOR VM38 MM SPIGOT
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
$15.49 -
MIKUNI Needle Jet 990-793-003-P-5
MIKUNI
$15.49Precise carburetor tuning is the foundation of responsive throttle control and optimal fuel atomization across the mid-range throttle band. The MIKUNI Needle Jet 990-793-003-P-5 is an OEM Mikuni component engineered for fine-tuning fuel delivery between...166P5- SKU:
- 166P5
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- JET SIZE:
- P-5
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- FEATURES:
- FOR VM38 MM SPIGOT
- MODEL:
- TYPE 166
- TYPE:
- NEEDLE
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- UNITS:
- EACH
$15.49 -
MIKUNI Needle Jet 990-793-003-P-6
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance doesn't have to mean a complete rebuild. The MIKUNI Needle Jet 990-793-003-P-6 is a genuine Mikuni component that gives you direct control over fuel delivery in the critical 1/4 to 3/4 throttle...166P6- SKU:
- 166P6
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- JET SIZE:
- P-6
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- JET
- RIDING STYLE:
- UTV
- TYPE:
- NEEDLE
- FEATURES:
- FOR VM38 MM SPIGOT
- MODEL:
- TYPE 166
- RIDING STYLE:
- SNOW
$15.49 -
MIKUNI Needle Jet 990-793-003-P-8
MIKUNI
$15.49Needle jet selection is critical for carburettor tuning in the mid-range throttle band—where your engine spends most of its time. The MIKUNI 990-793-003-P-8 offers precise fuel delivery calibration at 1/4 to 3/4 throttle opening, allowing you to dial in...166P8- SKU:
- 166P8
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- FEATURES:
- FOR VM38 MM SPIGOT
- RIDING STYLE:
- OFF-ROAD
- JET SIZE:
- P-8
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- UNITS:
- EACH
- MATERIAL:
- BRASS
- MODEL:
- TYPE 166
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
$15.49 -
MIKUNI Needle Jet 990-793-003-Q-0
MIKUNI
$15.49Precise carburetor tuning separates a well-running engine from a finely-dialed machine, and needle jet selection is critical to controlling fuel delivery in the critical 1/4 to 3/4 throttle range where most driving occurs. The MIKUNI Needle Jet...166Q0- SKU:
- 166Q0
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- JET SIZE:
- Q-0
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- FEATURES:
- FOR VM38 MM SPIGOT
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- TYPE 166
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
$15.49Qty in Cart: 0Quantity:Price:$15.49Subtotal: -
MIKUNI Needle Jet 990-793-003-Q-2
MIKUNI
$15.49Precise fuel-air mixture tuning in the 1/4 to 3/4 throttle range is critical for carburetors that perform consistently across real-world riding conditions. The MIKUNI Needle Jet 990-793-003-Q-2 gives you direct control over this crucial midrange...166Q2- SKU:
- 166Q2
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- FEATURES:
- FOR VM38 MM SPIGOT
- MODEL:
- TYPE 166
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- UNITS:
- EACH
- JET SIZE:
- Q-2
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$15.49 -
MIKUNI Needle Jet 990-793-003-Q-6
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance requires precision, and the MIKUNI Needle Jet 990-793-003-Q-6 delivers exactly that. This genuine Mikuni component gives you direct control over fuel delivery in the critical 1/4 to 3/4 throttle...166Q6- SKU:
- 166Q6
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- FEATURES:
- FOR VM38 MM SPIGOT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- JET SIZE:
- Q-6
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- UNITS:
- EACH
- MODEL:
- TYPE 166
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- NEEDLE
$15.49 -
MIKUNI Needle Jet 990-793-003-Q-8
MIKUNI
$15.49Precise carburetor tuning separates a well-running engine from a championship-caliber build. The MIKUNI Needle Jet 990-793-003-Q-8 gives you direct control over fuel delivery in the critical 1/4 to 3/4 throttle range, where most real-world driving occurs...166Q8- SKU:
- 166Q8
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- FEATURES:
- FOR VM38 MM SPIGOT
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- BRASS
- MODEL:
- TYPE 166
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- TYPE:
- NEEDLE
- UNITS:
- EACH
- JET SIZE:
- Q-8
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
$15.49 -
MIKUNI Needle Jet 990-793-003-R-0
MIKUNI
$15.49Precise carburetor tuning demands precision components, and the MIKUNI Needle Jet 990-793-003-R-0 delivers exactly that. This genuine Mikuni jet gives you repeatable control over your air-fuel mixture in the critical 1/4 to 3/4 throttle range—where most...166R0- SKU:
- 166R0
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- JET SIZE:
- R-0
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- JET
- RIDING STYLE:
- UTV
- TYPE:
- NEEDLE
- UNITS:
- EACH
- FEATURES:
- FOR VM38 MM SPIGOT
- MODEL:
- TYPE 166
- RIDING STYLE:
- SNOW
$15.49 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-1025
MIKUNI
$5.20Precision fuel delivery starts at the pilot jet—the component that controls your engine's low-speed fueling and idle quality. The MIKUNI Super BN Series Pilot Jet delivers consistent atomization and metering across the entire idle-to-cruise range,...KN1006061025- SKU:
- KN1006061025
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 102.5
- PRODUCT NAME:
- JET
- TYPE:
- PILOT
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-105
MIKUNI
$5.20Precise fuel atomization at idle and low-throttle conditions is critical for carbureted engines—especially in racing applications where every millisecond of response matters. A worn or incorrect pilot jet starves your engine of fuel during off-throttle...KN100606105- SKU:
- KN100606105
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 105
- PRODUCT NAME:
- JET
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-1075
MIKUNI
$5.20Precise pilot jet tuning is foundational to dialing in carburetor performance across the full throttle range—especially at idle and low-speed transitions where most riding happens. The MIKUNI Super BN Series Pilot Jet gives you the exact needle-seat...KN1006061075- SKU:
- KN1006061075
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 107.5
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- TYPE:
- PILOT
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-115
MIKUNI
$14.55A properly sized pilot jet is fundamental to carburetor tuning—it directly controls fuel delivery at idle and low-throttle operation, where engine responsiveness and smooth transitions begin. If your bike hesitates off the line, idles rough, or stumbles...KN100606115- SKU:
- KN100606115
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 115
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- UNITS:
- 4 PACK
$14.55 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-1175
MIKUNI
$14.55Precise fuel metering at idle and low-throttle conditions is critical for carburetor performance, and a worn or incorrect pilot jet directly impacts cold starts, throttle response, and fuel economy. The MIKUNI Super BN Series Pilot Jet delivers...KN1006061175- SKU:
- KN1006061175
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
- UNITS:
- 4 PACK
- JET SIZE:
- 117.5
$14.55 -
MIKUNI Main Jet - #142.5 - 4-Pack N102221-1425
MIKUNI
$14.55Precise fuel atomization directly impacts throttle response, engine efficiency, and overall drivability—making main jet selection critical for carburetor tuning. This OEM-spec #142.5 jet delivers the exact fuel metering your CV or Power Jet carburetor...KN1022211425- SKU:
- KN1022211425
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 142.5
- RIDING STYLE:
- ATV
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
- UNITS:
- 4 PACK
$14.55 -
MIKUNI Needle Jet VM38/41-R-2
MIKUNI
$15.49Fine-tuning your carburetor's fuel delivery at part-throttle operations is critical for drivability and throttle response, and the needle jet is your primary control point. This genuine Mikuni needle jet allows precise mid-range jetting adjustments...247R2- SKU:
- 247R2
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MODEL:
- TYPE 247
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- FEATURES:
- FOR OE YAMAHA
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- JET SIZE:
- R-2
- MATERIAL:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
$15.49 -
MIKUNI Needle Jet VM44/10-AA-5
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance requires precision, and the MIKUNI Needle Jet VM44/10-AA-5 delivers exactly that. This genuine Mikuni component gives you direct control over fuel delivery between 1/4 and 3/4 throttle opening—the range...224AA5- SKU:
- 224AA5
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- TYPE 224
- PRODUCT NAME:
- JET
- RIDING STYLE:
- STREET
- TYPE:
- NEEDLE
- FEATURES:
- FOR VM 40 MM - 44 MM SPIGOT
- JET SIZE:
- AA-5
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$15.49 -
MIKUNI Needle Jet VM44/10-Z-5
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance requires precision—and the MIKUNI Needle Jet VM44/10-Z-5 delivers exactly that. This genuine Mikuni component gives you direct control over fuel-air mixture from 1/4 to 3/4 throttle, the range where...224Z5- SKU:
- 224Z5
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- JET SIZE:
- Z-5
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- MODEL:
- TYPE 224
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- NEEDLE
- UNITS:
- EACH
- FEATURES:
- FOR VM 40 MM - 44 MM SPIGOT
$15.49 -
MIKUNI Needle Jet 785-24001-P-4
MIKUNI
$15.49Precise mid-range throttle response is critical for competitive racing and spirited driving, and a worn or incorrectly sized needle jet will create flat spots and unpredictable fueling across the 1/4 to 3/4 throttle range. The MIKUNI Needle Jet...389P4- SKU:
- 389P4
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- JET SIZE:
- P-4
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- FEATURES:
- FOR TM 32 MM - 33 MM SPIGOT
- MATERIAL:
- BRASS
- MODEL:
- TYPE 389
- RIDING STYLE:
- OFF-ROAD
$15.49Qty in Cart: 0Quantity:Price:$15.49Subtotal: -
MIKUNI Needle Jet 785-24001-P-8
MIKUNI
$15.49Precise mid-range tuning is essential for carburetors that perform consistently across varying throttle positions. The MIKUNI Needle Jet 785-24001-P-8 gives you direct control over fuel delivery in the critical 1/4 to 3/4 throttle range—the zone where...389P8- SKU:
- 389P8
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- JET SIZE:
- P-8
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- FEATURES:
- FOR TM 32 MM - 33 MM SPIGOT
- MATERIAL:
- BRASS
- MODEL:
- TYPE 389
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$15.49
