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 Jet Needle J8-6DP01
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...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
$10.50Fitments 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...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
$10.50Fitments 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...6EJ1256- SKU:
- 6EJ1256
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 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
$10.50 -
MIKUNI Jet Needle J8-6EJ12-57
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...6EJ1257- SKU:
- 6EJ1257
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 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: $9.95Fitments 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...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: $9.95 -
MIKUNI Jet Needle J8-6EJ12-59
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...6EJ1259- SKU:
- 6EJ1259
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- NEEDLE
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- MODEL:
- J8-6EJ12-59
$10.50 -
MIKUNI Jet Needle J8-6EJ12-60
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...6EJ1260- SKU:
- 6EJ1260
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- NEEDLE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- J8-6EJ12-60
- UNITS:
- EACH
$10.50 -
MIKUNI Jet Needle J8-6F15
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...6F15- SKU:
- 6F15
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- NEEDLE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- J8-6F15
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
$10.50 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-625
MIKUNI
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN100606625- SKU:
- KN100606625
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- MIKUNI
- UNITS:
- 4 PACK
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 62.5
- TYPE:
- PILOT
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-65
MIKUNI
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN10060665- SKU:
- KN10060665
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 65
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 4 PACK
- PRODUCT NAME:
- JET
- TYPE:
- PILOT
$5.20 -
MIKUNI Main Jet - #102.5 - 4-Pack N102221-1025
MIKUNI
$5.20Check dimensions before ordering, For CV and Power Jet carburetors as well as other OE applications that originally came with a N102.221 main jet, Sold to dealer in 4-pack, Made in JapanKN1022211025- SKU:
- KN1022211025
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- JET SIZE:
- 102.5
$5.20 -
MIKUNI Main Jet - #105 - 4-Pack N102221-105
MIKUNI
$5.20Check dimensions before ordering, For CV and Power Jet carburetors as well as other OE applications that originally came with a N102.221 main jet, Sold to dealer in 4-pack, Made in JapanKN102221105- SKU:
- KN102221105
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 105
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
- UNITS:
- 4 PACK
$5.20 -
MIKUNI Main Jet - #107.5 - 4-Pack N102221-1075
MIKUNI
$5.20Check dimensions before ordering, For CV and Power Jet carburetors as well as other OE applications that originally came with a N102.221 main jet, Sold to dealer in 4-pack, Made in JapanKN1022211075- SKU:
- KN1022211075
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- JET SIZE:
- 107.5
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
$5.20 -
MIKUNI Main Jet - #110 - 4-Pack N102221-110
MIKUNI
$5.20Check dimensions before ordering, For CV and Power Jet carburetors as well as other OE applications that originally came with a N102.221 main jet, Sold to dealer in 4-pack, Made in JapanKN102221110- SKU:
- KN102221110
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 110
- MATERIAL:
- BRASS
- MODEL:
- MIKUNI
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- PRODUCT NAME:
- JET
- TYPE:
- MAIN
- UNITS:
- 4 PACK
$5.20Qty in Cart: 0Quantity:Price:$5.20Subtotal: -
MIKUNI Main Jet - #115 - 4-Pack N102221-115
MIKUNI
$5.20Check dimensions before ordering, For CV and Power Jet carburetors as well as other OE applications that originally came with a N102.221 main jet, Sold to dealer in 4-pack, Made in JapanKN102221115- SKU:
- KN102221115
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 115
- MODEL:
- MIKUNI
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- WATERCRAFT
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- UNITS:
- 4 PACK
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
$5.20 -
MIKUNI Main Jet - #120 - 4-Pack N102221-120
MIKUNI
$5.20Check dimensions before ordering, For CV and Power Jet carburetors as well as other OE applications that originally came with a N102.221 main jet, Sold to dealer in 4-pack, Made in JapanKN102221120- SKU:
- KN102221120
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 120
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
$5.20 -
MIKUNI Main Jet - #135 - 4-Pack N102221-135
MIKUNI
$5.20Check dimensions before ordering, For CV and Power Jet carburetors as well as other OE applications that originally came with a N102.221 main jet, Sold to dealer in 4-pack, Made in JapanKN102221135- SKU:
- KN102221135
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- MAIN
- JET SIZE:
- 135
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- UNITS:
- 4 PACK
- MATERIAL:
- BRASS
- MODEL:
- MIKUNI
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- WATERCRAFT
$5.20 -
WSM Keihin High-Speed Jet 006-7130
WSM
$2.07For Keihin CDK 2 watercraft carbs, Made in Japan for WSM0067130- SKU:
- 0067130
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- BRASS
- MODEL:
- KEIHIN
- JET SIZE:
- 130
- TYPE:
- MAIN
- RIDING STYLE:
- WATERCRAFT
- PRODUCT NAME:
- JET
- UNITS:
- EACH
$2.07 -
WSM Keihin High-Speed Jet 006-7132
WSM
$2.07For Keihin CDK 2 watercraft carbs, Made in Japan for WSM0067132- SKU:
- 0067132
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MATERIAL:
- BRASS
- TYPE:
- MAIN
- UNITS:
- EACH
- JET SIZE:
- 132
- RIDING STYLE:
- WATERCRAFT
- MODEL:
- KEIHIN
- PRODUCT NAME:
- JET
$2.07 -
WSM Keihin High-Speed Jet 006-7138
WSM
$2.07For Keihin CDK 2 watercraft carbs, Made in Japan for WSM0067138- SKU:
- 0067138
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- MAIN
- MATERIAL:
- BRASS
- JET SIZE:
- 138
- MODEL:
- KEIHIN
- PRODUCT NAME:
- JET
- UNITS:
- EACH
- RIDING STYLE:
- WATERCRAFT
$2.07
