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
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WSM Keihin Low-Speed Jet 006-6078
WSM
$2.17Precise low-speed jetting is critical for smooth throttle response and consistent performance across the RPM range on your Keihin CDK 2 carb. This OEM-specification jet ensures your watercraft delivers reliable fuel delivery during low-speed operation,...0066078- SKU:
- 0066078
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 78
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
- UNITS:
- EACH
$2.17 -
WSM Keihin Low-Speed Jet 006-6080
WSM
$2.17Fine-tuning your watercraft's fuel delivery at idle and low-speed operation requires precision jet sizing, and the WSM Keihin Low-Speed Jet 006-6080 delivers exactly that. This OEM-spec replacement jet restores proper air-fuel mixture calibration in...0066080- SKU:
- 0066080
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 80
- TYPE:
- PILOT
- UNITS:
- EACH
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
$2.17 -
WSM Keihin Low-Speed Jet 006-6082
WSM
$2.17Precision fuel delivery at low engine speeds defines carburetor performance, and this WSM Keihin low-speed jet is engineered to maintain consistent idle and transition characteristics on your watercraft. Designed specifically for Keihin CDK 2...0066082- SKU:
- 0066082
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 82
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
- UNITS:
- EACH
- PRODUCT NAME:
- JET
$2.17Qty in Cart: 0Quantity:Price:$2.17Subtotal: -
WSM Keihin Low-Speed Jet 006-6085
WSM
$2.17Precision fuel delivery at low RPM is critical for smooth acceleration and reliable starting in Keihin CDK 2 carburetors. A worn or incorrectly sized low-speed jet forces you to compensate with choke adjustments or idle screws, compromising throttle...0066085- SKU:
- 0066085
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- JET SIZE:
- 85
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
- PRODUCT NAME:
- JET
- UNITS:
- EACH
$2.17Qty in Cart: 0Quantity:Price:$2.17Subtotal: -
WSM Keihin Low-Speed Jet 006-6088
WSM
$2.07Precise low-speed jetting is critical for smooth throttle response and reliable cold-start performance on Keihin CDK 2 carburetors. This OEM-spec jet ensures your watercraft engine delivers consistent fuel atomization during idle and low-rpm operation,...0066088- SKU:
- 0066088
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
- JET SIZE:
- 88
$2.07Qty in Cart: 0Quantity:Price:$2.07Subtotal: -
WSM Keihin Low-Speed Jet 006-6095
WSM
$2.17Fine-tuning your watercraft's fuel mixture at low RPM is critical for smooth acceleration, responsive throttle control, and reliable cold starts. A worn or incorrectly sized low-speed jet creates hesitation and stumbling during low-end operation—exactly...0066095- SKU:
- 0066095
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- JET
- UNITS:
- EACH
- JET SIZE:
- 95
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
$2.17Qty in Cart: 0Quantity:Price:$2.17Subtotal: -
WSM Keihin High-Speed Jet 006-7110
WSM
$2.17Tuning your watercraft's fuel delivery requires precision, and the WSM Keihin High-Speed Jet is engineered to deliver exactly that. This OEM-quality jet maintains consistent fuel atomization across high-RPM operating ranges, preventing lean conditions...0067110- SKU:
- 0067110
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- EACH
- JET SIZE:
- 110
- MATERIAL:
- BRASS
- RIDING STYLE:
- WATERCRAFT
- MODEL:
- KEIHIN
- PRODUCT NAME:
- JET
- TYPE:
- MAIN
$2.17 -
WSM Keihin High-Speed Jet 006-7115
WSM
$2.17If you're running a Keihin CDK 2 carb on your watercraft, jetting accuracy directly impacts throttle response, fuel efficiency, and overall engine performance. The WSM Keihin High-Speed Jet 006-7115 delivers precision fuel atomization at high RPM,...0067115- SKU:
- 0067115
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- MODEL:
- KEIHIN
- JET SIZE:
- 115
- MATERIAL:
- BRASS
- UNITS:
- EACH
- TYPE:
- MAIN
$2.17Qty in Cart: 0Quantity:Price:$2.17Subtotal: -
WSM Keihin High-Speed Jet 006-7125
WSM
$2.17If you're running a Keihin CDK 2 carb on your watercraft and experiencing lean conditions or inconsistent fuel delivery at high RPM, this OEM-spec jet is your solution. The WSM Keihin High-Speed Jet 006-7125 is precision-manufactured in Japan to restore...0067125- SKU:
- 0067125
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 125
- UNITS:
- EACH
- MATERIAL:
- BRASS
- MODEL:
- KEIHIN
- PRODUCT NAME:
- JET
- TYPE:
- MAIN
$2.17 -
WSM Keihin High-Speed Jet 006-7128
WSM
$2.17Precise fuel atomization is critical for high-RPM watercraft performance, and factory jets often fall short under demanding conditions. The WSM Keihin High-Speed Jet 006-7128 delivers the exact metering your CDK 2 carburetor needs for consistent throttle...0067128- SKU:
- 0067128
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- JET
- TYPE:
- MAIN
- MODEL:
- KEIHIN
- JET SIZE:
- 128
- RIDING STYLE:
- WATERCRAFT
- MATERIAL:
- BRASS
- UNITS:
- EACH
$2.17Qty in Cart: 0Quantity:Price:$2.17Subtotal: -
WSM Keihin High-Speed Jet 006-7145
WSM
$2.17If you're running a Keihin CDK 2 carb on your watercraft, jet sizing directly impacts your fuel delivery precision and throttle response. The WSM Keihin High-Speed Jet 006-7145 is engineered to optimize mid-to-high RPM performance, ensuring consistent...0067145- SKU:
- 0067145
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- KEIHIN
- UNITS:
- EACH
- JET SIZE:
- 145
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- MAIN
- MATERIAL:
- BRASS
$2.17 -
WSM Keihin High-Speed Jet 006-7148
WSM
$2.17Fine-tuning your watercraft's fuel delivery requires precision components engineered to exacting tolerances. The WSM Keihin High-Speed Jet 006-7148 ensures optimal air-fuel mixture at peak RPM, delivering crisp throttle response and consistent...0067148- SKU:
- 0067148
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- EACH
- JET SIZE:
- 148
- MODEL:
- KEIHIN
- TYPE:
- MAIN
- MATERIAL:
- BRASS
$2.17 -
WSM Keihin High-Speed Jet 006-7152
WSM
$2.17If you're running a Keihin CDK 2 carb on your watercraft and experiencing lean conditions or inconsistent jetting, this high-speed jet is engineered to deliver precise fuel atomization at peak RPM. WSM's OEM-grade Keihin jets are manufactured to exact...0067152- SKU:
- 0067152
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MODEL:
- KEIHIN
- UNITS:
- EACH
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- MAIN
- JET SIZE:
- 152
- MATERIAL:
- BRASS
$2.17Qty in Cart: 0Quantity:Price:$2.17Subtotal: -
WSM Keihin High-Speed Jet 006-7158
WSM
$2.17Optimizing fuel delivery in your Keihin CDK 2 watercraft carburetor requires precision engineering that matches your engine's high-speed demands. This WSM high-speed jet is engineered to maintain consistent fuel atomization at elevated RPMs, preventing...0067158- SKU:
- 0067158
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- JET
- TYPE:
- MAIN
- JET SIZE:
- 158
- MODEL:
- KEIHIN
- MATERIAL:
- BRASS
- UNITS:
- EACH
- RIDING STYLE:
- WATERCRAFT
$2.17Qty in Cart: 0Quantity:Price:$2.17Subtotal: -
WSM Keihin High-Speed Jet 006-7160
WSM
$2.17Precision fuel delivery is critical to maintaining peak RPM performance and throttle response in Keihin CDK 2 carburetors. This OEM-equivalent high-speed jet ensures your watercraft carburetor maintains factory-spec air-fuel ratios under sustained...0067160- SKU:
- 0067160
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 160
- MODEL:
- KEIHIN
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- MAIN
- MATERIAL:
- BRASS
- UNITS:
- EACH
$2.17Qty in Cart: 0Quantity:Price:$2.17Subtotal: -
MIKUNI Jet Needle J8-6DP01
MIKUNI
$10.50Fine-tuning your carburetor's mid-range fuel delivery is critical for consistent throttle response and drivability across the RPM band. The MIKUNI Jet Needle J8-6DP01 directly controls fuel mixture in this crucial range, and selecting the correct needle...6DP1- SKU:
- 6DP1
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- MODEL:
- J8-6DP01
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$10.50 -
MIKUNI Jet Needle (Replacement for/6DP5) J8-6DP17
MIKUNI
$10.50Precise fuel mixture control across the mid-range throttle positions is essential for consistent carburetor performance, and OEM jet needles often wear or become damaged over time. The MIKUNI J8-6DP17 Jet Needle restores the correct air-fuel ratio,...6DP17- SKU:
- 6DP17
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- J8-6DP17
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$10.50 -
MIKUNI Jet Needle J8-6EJ12-56
MIKUNI
$10.50Fine-tuning your carburetor's mid-range fuel delivery is critical for consistent throttle response and overall drivability. The MIKUNI Jet Needle J8-6EJ12-56 gives you precise control over the fuel mixture during the transition zone where most real-world...6EJ1256- SKU:
- 6EJ1256
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MODEL:
- J8-6EJ12-56
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- NEEDLE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$10.50Qty in Cart: 0Quantity:Price:$10.50Subtotal: -
MIKUNI Jet Needle J8-6EJ12-57
MIKUNI
$10.50Precise mid-range fuel mixture control is essential for consistent throttle response and optimal engine performance across varying load conditions. The MIKUNI Jet Needle J8-6EJ12-57 delivers the metering accuracy your Mikuni carburetor demands, ensuring...6EJ1257- SKU:
- 6EJ1257
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- MODEL:
- J8-6EJ12-57
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$10.50 -
On Sale
MIKUNI Jet Needle J8-6EJ12-58
MIKUNI
MSRP: $9.95Now: $6.00Was: $9.95Fine-tune your mid-range fuel mixture with precision using the MIKUNI Jet Needle J8-6EJ12-58, the OEM component trusted by carb tuners and performance builders worldwide. This needle directly controls fuel delivery during partial throttle operation—the...6EJ1258- SKU:
- 6EJ1258
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- J8-6EJ12-58
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- NEEDLE
- UNITS:
- EACH
MSRP: $9.95Now: $6.00Was: $9.95Qty in Cart: 0Quantity:Price:MSRP: $9.95Now: $6.00Was: $9.95Subtotal:
