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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MIKUNI Main Jet #660 - 4-Pack 4/042-660
MIKUNI
$5.20Fit Mikuni carburetors VM18 (clamp on), VM24-512, VM26-512, VM26-606, TMX Series and others that originally came with 4/042 main jets, Also fit several OE applications; check dimensions before ordering, Made in JapanKM4042660- SKU:
- KM4042660
- 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
- JET SIZE:
- 660
- MATERIAL:
- BRASS
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- 4 PACK
- FEATURES:
- FOR VM CARBURETORS
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH IMPERIAL:
- 0.47'
- OVERALL DIAMETER METRIC:
- 6.00 MM
- PRODUCT NAME:
- JET
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
$5.20 -
MIKUNI Main Jet #680 - 4-Pack 4/042-680
MIKUNI
$5.20Fit Mikuni carburetors VM18 (clamp on), VM24-512, VM26-512, VM26-606, TMX Series and others that originally came with 4/042 main jets, Also fit several OE applications; check dimensions before ordering, Made in JapanKM4042680- SKU:
- KM4042680
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- FEATURES:
- FOR VM CARBURETORS
- JET SIZE:
- 680
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH:
- 12 MM (0,47')
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
$5.20 -
MIKUNI Main Jet #70 - 4-Pack 4/042-70
MIKUNI
$5.20Fit Mikuni carburetors VM18 (clamp on), VM24-512, VM26-512, VM26-606, TMX Series and others that originally came with 4/042 main jets, Also fit several OE applications; check dimensions before ordering, Made in JapanKM404270- SKU:
- KM404270
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD TYPE:
- HEX HEAD
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH METRIC:
- 12 MM
- FEATURES:
- FOR VM CARBURETORS
- JET SIZE:
- 70
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- MATERIAL:
- BRASS
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- 4 PACK
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH IMPERIAL:
- 0.47'
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
$5.20 -
MIKUNI Main Jet #700 - 4-Pack 4/042-700
MIKUNI
$5.20Fit Mikuni carburetors VM18 (clamp on), VM24-512, VM26-512, VM26-606, TMX Series and others that originally came with 4/042 main jets, Also fit several OE applications; check dimensions before ordering, Made in JapanKM4042700- SKU:
- KM4042700
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- FEATURES:
- FOR VM CARBURETORS
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH:
- 12 MM (0,47')
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- JET SIZE:
- 700
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
$5.20 -
MIKUNI Main Jet #75 - 4-Pack 4/042-75
MIKUNI
$5.20Fit Mikuni carburetors VM18 (clamp on), VM24-512, VM26-512, VM26-606, TMX Series and others that originally came with 4/042 main jets, Also fit several OE applications; check dimensions before ordering, Made in JapanKM404275- SKU:
- KM404275
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- FEATURES:
- FOR VM CARBURETORS
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
- UNITS:
- 4 PACK
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- SNOW
- JET SIZE:
- 75
- OVERALL LENGTH METRIC:
- 12 MM
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$5.20 -
MIKUNI Main Jet #80 - 4-Pack 4/042-80
MIKUNI
$5.20Fit Mikuni carburetors VM18 (clamp on), VM24-512, VM26-512, VM26-606, TMX Series and others that originally came with 4/042 main jets, Also fit several OE applications; check dimensions before ordering, Made in JapanKM404280- SKU:
- KM404280
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- FEATURES:
- FOR VM CARBURETORS
- JET SIZE:
- 80
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
- UNITS:
- 4 PACK
- OVERALL LENGTH METRIC:
- 12 MM
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL DIAMETER METRIC:
- 6.00 MM
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$5.20 -
MIKUNI Main Jet #85 - 4-Pack 4/042-85
MIKUNI
$14.56Fit Mikuni carburetors VM18 (clamp on), VM24-512, VM26-512, VM26-606, TMX Series and others that originally came with 4/042 main jets, Also fit several OE applications; check dimensions before ordering, Made in JapanKM404285- SKU:
- KM404285
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 85
- OVERALL DIAMETER METRIC:
- 6.00 MM
- 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 LENGTH:
- 12 MM (0,47')
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- UNITS:
- 4 PACK
- FEATURES:
- FOR VM CARBURETORS
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH METRIC:
- 12 MM
$14.56 -
MIKUNI Main Jet #90 - 4-Pack 4/042-90
MIKUNI
$14.56Fit Mikuni carburetors VM18 (clamp on), VM24-512, VM26-512, VM26-606, TMX Series and others that originally came with 4/042 main jets, Also fit several OE applications; check dimensions before ordering, Made in JapanKM404290- SKU:
- KM404290
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- 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
$14.56 -
MIKUNI Main Jet #95 - 4-Pack 4/042-95
MIKUNI
$14.56Fit Mikuni carburetors VM18 (clamp on), VM24-512, VM26-512, VM26-606, TMX Series and others that originally came with 4/042 main jets, Also fit several OE applications; check dimensions before ordering, Made in JapanKM404295- SKU:
- KM404295
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- FEATURES:
- FOR VM CARBURETORS
- JET SIZE:
- 95
- OVERALL LENGTH METRIC:
- 12 MM
- 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
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- OFF-ROAD
$14.56 -
MIKUNI Super BN Carburetor Series Needle Valve Assembly 786-35015-2.5
MIKUNI
$24.15Genuine Mikuni push-in type needle and seat for Super BN and BNI carburetors, Made in Japan7863501525- SKU:
- 7863501525
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
$24.15 -
MIKUNI Needle Valve Assembly 786-46001-1.5
MIKUNI
$24.15Genuine Mikuni needle and seat assemblies provide reliable performance, Check application and size of needle and seat assembly before ordering, Made to the highest standards, Made in Japan7864600115- SKU:
- 7864600115
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- THREAD DIAMETER METRIC:
- 10.00 MM
- THREAD LENGTH METRIC:
- 7.00 MM
- UNITS:
- EACH
- RIDING STYLE:
- ATV
- HEAD TYPE:
- PUSH-IN
- JET SIZE:
- 1.5
- PRODUCT NAME:
- NEEDLE AND SEAT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
$24.15 -
MIKUNI Needle and Seat 786-46001-1.8
MIKUNI
$24.15Genuine Mikuni needle and seat assemblies provide reliable performance, Check application and size of needle and seat assembly before ordering, Made to the highest standards, Made in Japan7864600118- SKU:
- 7864600118
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
$24.15 -
MIKUNI Needle and Seat 786-46001-2.0
MIKUNI
$24.15Genuine Mikuni needle and seat assemblies provide reliable performance, Check application and size of needle and seat assembly before ordering, Made to the highest standards, Made in Japan7864600120- SKU:
- 7864600120
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
$24.15 -
MIKUNI Jet Needle J8-7F06
MIKUNI
$10.50Fitments include several Mikuni VM model and some OE Mikuni carburetors, Jet needles control the fuel mixture in the mid-range throttle position, Some jet needles don't have measurements provided by Mikuni, Use charting to verify dimensions in...7F6- SKU:
- 7F6
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- MODEL:
- J8-7F06
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
$10.50 -
MIKUNI Jet Needle J8-7F07
MIKUNI
$10.50Fitments include several Mikuni VM model and some OE Mikuni carburetors, Jet needles control the fuel mixture in the mid-range throttle position, Some jet needles don't have measurements provided by Mikuni, Use charting to verify dimensions in...7F7- SKU:
- 7F7
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- J8-7F07
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$10.50 -
MIKUNI Jet Needle J8-5DP07
MIKUNI
$10.50Fitments include several Mikuni VM model and some OE Mikuni carburetors, Jet needles control the fuel mixture in the mid-range throttle position, Some jet needles don't have measurements provided by Mikuni, Use charting to verify dimensions in...5DP7- SKU:
- 5DP7
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- NEEDLE
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MODEL:
- J8-5DP07
$10.50 -
MIKUNI Jet Needle J8-5FP17
MIKUNI
$10.50Fitments include several Mikuni VM model and some OE Mikuni carburetors, Jet needles control the fuel mixture in the mid-range throttle position, Some jet needles don't have measurements provided by Mikuni, Use charting to verify dimensions in...5FP17- SKU:
- 5FP17
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- NEEDLE
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MODEL:
- J8-5FP17
$10.50 -
MIKUNI Jet Needle J8-5L01
MIKUNI
$10.50Fitments include several Mikuni VM model and some OE Mikuni carburetors, Jet needles control the fuel mixture in the mid-range throttle position, Some jet needles don't have measurements provided by Mikuni, Use charting to verify dimensions in...5L1- SKU:
- 5L1
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- MODEL:
- J8-5L01
- RIDING STYLE:
- OFF-ROAD
$10.50 -
On Sale
MIKUNI Jet Needle J8-6DGY04-59
MIKUNI
MSRP: $10.50Now: $7.00Was: $10.50Fitments include several Mikuni VM model and some OE Mikuni carburetors, Jet needles control the fuel mixture in the mid-range throttle position, Some jet needles don't have measurements provided by Mikuni, Use charting to verify dimensions in...6DGY0459- SKU:
- 6DGY0459
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- MODEL:
- J8-6DGY04-59
- PRODUCT NAME:
- JET
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- TYPE:
- NEEDLE
MSRP: $10.50Now: $7.00Was: $10.50 -
MIKUNI Jet Needle J8-6DH02
MIKUNI
$10.50Fitments include several Mikuni VM model and some OE Mikuni carburetors, Jet needles control the fuel mixture in the mid-range throttle position, Some jet needles don't have measurements provided by Mikuni, Use charting to verify dimensions in...6DH2- SKU:
- 6DH2
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- MODEL:
- J8-6DH02
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$10.50
