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 Main Jet #175 - 4-Pack 4/042-175
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 JapanKM4042175- SKU:
- KM4042175
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD TYPE:
- HEX HEAD
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- UTV
- MATERIAL:
- BRASS
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- 4 PACK
- FEATURES:
- FOR VM CARBURETORS
- JET SIZE:
- 175
- OVERALL DIAMETER METRIC:
- 6.00 MM
- PRODUCT NAME:
- JET
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- TYPE:
- MAIN
$5.20Qty in Cart: 0Quantity:Price:$5.20Subtotal: -
MIKUNI Main Jet #220 - 4-Pack 4/042-220
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 JapanKM4042220- 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
$5.20 -
MIKUNI Main Jet #240 - 4-Pack 4/042-240
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 JapanKM4042240- 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
$5.20Fit 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 JapanKM4042250- 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
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN100606100- 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
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-110
MIKUNI
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN100606110- 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
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N1003606-1125
MIKUNI
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN1006061125- 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
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN100606120- 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
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-675
MIKUNI
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN100606675- SKU:
- KN100606675
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 67.5
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
- PRODUCT NAME:
- JET
- UNITS:
- 4 PACK
$5.20Qty in Cart: 0Quantity:Price:$5.20Subtotal: -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-70
MIKUNI
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN10060670- SKU:
- KN10060670
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 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
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN100606725- 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
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN10060675- 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
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN100606775- 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
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN10060680- 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
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN100606825- 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
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-85
MIKUNI
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN10060685- 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
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-875
MIKUNI
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN100606875- 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
$15.49Inside diameter increases in size as size’s code increases alphabetically and numerically, Genuine Mikuni needle jets will have series and size stamping for identification, Needle jets allow a great way for tuning carb at 1/4-3/4 turn throttle, Made in...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 -
MIKUNI Needle Jet VM38/41-Q-8
MIKUNI
$15.49Inside diameter increases in size as size’s code increases alphabetically and numerically, Genuine Mikuni needle jets will have series and size stamping for identification, Needle jets allow a great way for tuning carb at 1/4-3/4 turn throttle, Made in...247Q8- SKU:
- 247Q8
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- JET SIZE:
- Q-8
- MODEL:
- TYPE 247
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- FEATURES:
- FOR OE YAMAHA
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- TYPE:
- NEEDLE
$15.49 -
On Sale
MIKUNI Needle Jet VM38/41-R-4
MIKUNI
MSRP: $14.95Now: $10.00Was: $14.95Inside diameter increases in size as size’s code increases alphabetically and numerically, Genuine Mikuni needle jets will have series and size stamping for identification, Needle jets allow a great way for tuning carb at 1/4-3/4 turn throttle, Made in...247R4- SKU:
- 247R4
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MODEL:
- TYPE 247
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- JET SIZE:
- R-4
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- FEATURES:
- FOR OE YAMAHA
- TYPE:
- NEEDLE
MSRP: $14.95Now: $10.00Was: $14.95
