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 - #85 - 4-Pack N102221-85
MIKUNI
$14.55If you're tuning a CV or Power Jet carburetor, jet selection directly impacts fuel delivery, throttle response, and overall engine performance. The MIKUNI #85 Main Jet is a precision-engineered replacement that restores OEM-spec fueling for carburetors...KN10222185- SKU:
- KN10222185
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 85
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
$14.55 -
MIKUNI Main Jet - #87.5 - 4-Pack N102221-875
MIKUNI
$14.55Precise fuel metering is the foundation of carburetor tuning, and the right main jet makes the difference between optimal performance and wasteful running conditions. The MIKUNI #87.5 Main Jet delivers consistent fuel delivery across your engine's...KN102221875- SKU:
- KN102221875
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- BRASS
- MODEL:
- MIKUNI
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- JET SIZE:
- 87.5
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- MAIN
- UNITS:
- 4 PACK
$14.55 -
MIKUNI Main Jet - #90 - 4-Pack N102221-90
MIKUNI
$14.55Fine-tuning your carburetor's fuel delivery is essential for achieving peak engine performance and reliability. The MIKUNI #90 Main Jet is a direct replacement for OE applications, ensuring your carb runs at its optimal air-fuel ratio without guesswork...KN10222190- SKU:
- KN10222190
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 90
- MATERIAL:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
- UNITS:
- 4 PACK
$14.55 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-90
MIKUNI
$5.20Precise fuel delivery at low throttle openings depends entirely on your pilot jet—get it wrong, and you're dealing with hard starts, hesitation, and unpredictable idle characteristics. The MIKUNI Super BN Series Pilot Jet delivers consistent atomization...KN10060690- SKU:
- KN10060690
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- 4 PACK
- JET SIZE:
- 90
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-925
MIKUNI
$5.20Precise pilot jet sizing is fundamental to carburetor tuning, especially when you're chasing optimal fuel delivery at idle and low-throttle conditions. The MIKUNI Super BN Series Pilot Jet ensures consistent atomization and clean throttle response across...KN100606925- SKU:
- KN100606925
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 92.5
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- UNITS:
- 4 PACK
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-95
MIKUNI
$5.20Precision fuel metering at idle and low-throttle conditions separates a dialed-in carb setup from one that stumbles and hesitates. The MIKUNI Super BN Series Pilot Jet delivers consistent, repeatable jetting that stabilizes your air-fuel ratio exactly...KN10060695- SKU:
- KN10060695
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 95
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
- PRODUCT NAME:
- JET
- TYPE:
- PILOT
- UNITS:
- 4 PACK
$5.20 -
On Sale
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-975
MIKUNI
MSRP: $4.95Now: $4.00Was: $6.60Precise fuel metering at low throttle openings is critical for consistent idle quality and smooth throttle response across varying altitudes and temperatures. The MIKUNI Super BN Series Pilot Jet delivers the exact fuel atomization your carburettor needs...KN100606975- SKU:
- KN100606975
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 97.5
- TYPE:
- PILOT
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- MODEL:
- MIKUNI
- UNITS:
- 4 PACK
MSRP: $4.95Now: $4.00Was: $6.60 -
MIKUNI Main Jet - #100 - 4-Pack N102221-100
MIKUNI
$14.55If your carburetor is running lean or your engine lacks throttle response, a proper main jet is the foundation of accurate fuel delivery across the RPM band. The MIKUNI #100 main jet is engineered for CV and Power Jet carburetors, ensuring consistent...KN102221100- SKU:
- KN102221100
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- MAIN
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- 4 PACK
- JET SIZE:
- 100
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
$14.55 -
MIKUNI Main Jet - #125 - 4-Pack N102221-125
MIKUNI
$14.55If you're tuning a CV or Power Jet carburetor, jet selection directly impacts fuel delivery, throttle response, and engine performance across your powerband. The MIKUNI #125 main jet is the OE replacement specification for applications originally...KN102221125- SKU:
- KN102221125
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 125
- PRODUCT NAME:
- JET
- TYPE:
- MAIN
- UNITS:
- 4 PACK
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MATERIAL:
- BRASS
- MODEL:
- MIKUNI
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- WATERCRAFT
$14.55 -
MIKUNI Main Jet - #130 - 4-Pack N102221-130
MIKUNI
$14.55If you're tuning a carbureted engine with Mikuni CV or Power Jet carbs, jet selection directly impacts fuel delivery precision and throttle response. Installing the correct main jet eliminates lean-running conditions that compromise power and accelerate...KN102221130- SKU:
- KN102221130
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- MAIN
- JET SIZE:
- 130
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- UNITS:
- 4 PACK
$14.55 -
MIKUNI Main Jet #460 - 4-Pack 4/042-460
MIKUNI
$14.56Tuning your Mikuni carb requires precision—wrong jet sizing throws your air-fuel ratio off and kills performance. This 4-pack of #460 main jets gives you the exact metering you need for consistent power delivery across your RPM range, whether you're...KM4042460- SKU:
- KM4042460
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- MAIN
- 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
- FEATURES:
- FOR VM CARBURETORS
- JET SIZE:
- 460
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- SNOW
- UNITS:
- 4 PACK
$14.56 -
MIKUNI Main Jet #470 - 4-Pack 4/042-470
MIKUNI
$5.20If your Mikuni carburetor is running too lean or too rich, a main jet swap is the fastest way to dial in your air-fuel ratio without breaking out fabrication tools. The #470 jet is a direct bolt-in replacement for common Mikuni applications, letting you...KM4042470- SKU:
- KM4042470
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OVERALL DIAMETER METRIC:
- 6.00 MM
- PRODUCT NAME:
- JET
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
- JET SIZE:
- 470
- MATERIAL:
- BRASS
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- FEATURES:
- FOR VM CARBURETORS
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- UTV
- HEAD TYPE:
- HEX HEAD
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- OFF-ROAD
$5.20 -
MIKUNI Main Jet #560 - 4-Pack 4/042-560
MIKUNI
$5.20Proper jetting is non-negotiable for carburetor performance, and a worn or incorrect main jet will rob your engine of power and throttle response. The MIKUNI #560 main jet delivers the precise fuel metering your carb demands, ensuring consistent...KM4042560- SKU:
- KM4042560
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- OFF-ROAD
- FEATURES:
- FOR VM CARBURETORS
- JET SIZE:
- 560
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
$5.20 -
MIKUNI Main Jet #580 - 4-Pack 4/042-580
MIKUNI
$5.20Proper jetting is fundamental to carburetor performance—too lean and you risk engine damage, too rich and you sacrifice efficiency and throttle response. The MIKUNI Main Jet #580 delivers precise fuel metering for your Mikuni carburetor, ensuring optimal...KM4042580- SKU:
- KM4042580
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD TYPE:
- HEX HEAD
- JET SIZE:
- 580
- MATERIAL:
- BRASS
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- OFF-ROAD
- FEATURES:
- FOR VM CARBURETORS
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
$5.20 -
MIKUNI Main Jet #60 - 4-Pack 4/042-60
MIKUNI
$14.56Precise fuel metering is non-negotiable in high-performance carburetor tuning, and the MIKUNI Main Jet #60 delivers the exact atomization your engine demands across load ranges. Whether you're rejetting after forced induction upgrades or restoring a carb...KM404260- SKU:
- KM404260
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- BRASS
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- JET SIZE:
- 60
- OVERALL LENGTH METRIC:
- 12 MM
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- HEAD TYPE:
- HEX HEAD
- 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
- RIDING STYLE:
- UTV
- FEATURES:
- FOR VM CARBURETORS
- TYPE:
- MAIN
- UNITS:
- 4 PACK
$14.56 -
MIKUNI Main Jet - #95 - 4-Pack N102221-95
MIKUNI
$5.20Fine-tuning your carburetor's fuel delivery is critical for achieving optimal engine performance and throttle response. The MIKUNI #95 main jet delivers precise fuel metering across mid-range and wide-open throttle conditions, making it essential for...KN10222195- SKU:
- KN10222195
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 95
- MODEL:
- MIKUNI
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- UNITS:
- 4 PACK
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- WATERCRAFT
$5.20 -
MIKUNI Needle and Seat VM28/163-2.0
MIKUNI
$24.15The needle and seat assembly is the critical control point in your carburetor's fuel delivery system—wear or degradation here directly impacts your air-fuel mixture precision and engine response. Genuine Mikuni components maintain the exacting tolerances...VM2816320- SKU:
- VM2816320
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$24.15 -
MIKUNI Needle and Seat VM28/163-2.5
MIKUNI
$24.15A worn or damaged needle and seat directly compromises fuel metering precision, leading to lean conditions, hesitation, and unreliable idle quality. This genuine Mikuni assembly restores proper fuel flow control and carburetor response, critical for...VM2816325- SKU:
- VM2816325
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$24.15 -
MIKUNI Needle and Seat VM28/511-1.8
MIKUNI
$24.15The needle and seat assembly is the critical metering component in your carburetor—it directly controls fuel flow and atomization, which means it impacts throttle response, fuel efficiency, and engine stability. A worn or damaged needle and seat will...VM2851118- SKU:
- VM2851118
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$24.15 -
MIKUNI Needle and Seat VM28/511-2.0
MIKUNI
$24.15A worn or damaged needle and seat assembly compromises fuel atomization and carburetor response, directly impacting throttle precision and engine reliability. The Mikuni VM28/511-2.0 restores OEM-specification fuel delivery with Japanese manufacturing...VM2851120- SKU:
- VM2851120
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$24.15
