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 Pilot Jet #45 4-Pack VM22/210-45
MIKUNI
$14.55A properly sized pilot jet is critical for smooth idle quality, precise throttle response, and reliable cold starts—especially when tuning carburetors for modified engines or altitude changes. The Mikuni #45 pilot jet delivers the exact fuel metering...KM545- SKU:
- KM545
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- BRASS
- MATERIAL:
- BRASS
- OVERALL LENGTH METRIC:
- 14.00 MM
- RIDING STYLE:
- OFF-ROAD
- JET SIZE:
- 45
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- HEAD DIAMETER METRIC:
- 4.00 MM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- TYPE:
- PILOT
- UNITS:
- 4 PACK
- BASE COLOR:
- BRASS
- FEATURES:
- FOR VM CARBURETORS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- STREET
$14.55 -
MIKUNI Pilot Jet #50 4-Pack VM22/210-50
MIKUNI
$5.20A properly sized pilot jet is critical for smooth, predictable throttle response at low RPM—the foundation of any well-tuned carburator. This genuine Mikuni #50 pilot jet delivers consistent fuel atomization in the idle and off-idle circuits, eliminating...KM550- SKU:
- KM550
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BASE COLOR:
- BRASS
- FEATURES:
- FOR VM CARBURETORS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
- HEAD DIAMETER METRIC:
- 4.00 MM
- OVERALL LENGTH METRIC:
- 14.00 MM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- TYPE:
- PILOT
- JET SIZE:
- 50
- MATERIAL:
- BRASS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- COLOR/FINISH:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$5.20 -
MIKUNI Pilot Jet #55 4-Pack VM22/210-55
MIKUNI
$5.20A properly sized pilot jet is fundamental to carburetor tuning—it directly controls fuel delivery at idle and low throttle openings, affecting cold starts, throttle response, and fuel economy. If you're experiencing hesitation off the line, rough idling,...KM555- SKU:
- KM555
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- PILOT
- BASE COLOR:
- BRASS
- FEATURES:
- FOR VM CARBURETORS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BRASS
- JET SIZE:
- 55
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- 4 PACK
- HEAD DIAMETER METRIC:
- 4.00 MM
- MATERIAL:
- BRASS
- OVERALL LENGTH METRIC:
- 14.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
$5.20 -
MIKUNI Pilot Jet # 60 4-Pack VM22/210-60
MIKUNI
$5.20A pilot jet controls your carburetor's idle and low-speed fueling—get this wrong, and you'll deal with rough starts, stumbling, and wasted throttle response. The MIKUNI #60 pilot jet delivers precise fuel metering at low RPMs, ensuring smooth idle...KM560- SKU:
- KM560
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- BRASS
- MATERIAL:
- BRASS
- OVERALL LENGTH METRIC:
- 14.00 MM
- RIDING STYLE:
- OFF-ROAD
- HEAD DIAMETER METRIC:
- 4.00 MM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- TYPE:
- PILOT
- UNITS:
- 4 PACK
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- BASE COLOR:
- BRASS
- FEATURES:
- FOR VM CARBURETORS
- JET SIZE:
- 60
- RIDING STYLE:
- STREET
$5.20 -
MIKUNI Pilot Jet #65 4-Pack VM22/210-65
MIKUNI
$5.20A lean-running carburetor starts with precision fuel metering at idle and low-throttle conditions—exactly what the pilot jet controls. If your VM, TM, or TMX carb is running rich off-idle or struggling to deliver crisp throttle response, swapping to the...KM565- SKU:
- KM565
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- JET SIZE:
- 65
- MATERIAL:
- BRASS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- HEAD DIAMETER METRIC:
- 4.00 MM
- OVERALL LENGTH METRIC:
- 14.00 MM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- TYPE:
- PILOT
- UNITS:
- 4 PACK
- BASE COLOR:
- BRASS
- FEATURES:
- FOR VM CARBURETORS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- STREET
$5.20 -
MIKUNI Pilot Jet #75 4-Pack VM22/210-75
MIKUNI
$14.55A lean idle and smooth low-end response depend entirely on getting the pilot jet right. The Mikuni #75 pilot jet delivers precise fuel metering at cruise and idle RPMs, eliminating the hesitation and stumbling that plague incorrectly jetted carburetors...KM575- SKU:
- KM575
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- PILOT
- BASE COLOR:
- BRASS
- FEATURES:
- FOR VM CARBURETORS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- 4 PACK
- HEAD DIAMETER METRIC:
- 4.00 MM
- JET SIZE:
- 75
- MATERIAL:
- BRASS
- OVERALL LENGTH METRIC:
- 14.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
$14.55 -
MIKUNI Pilot Jet #15 4-Pack VM22/210-15
MIKUNI
$14.55A pilot jet directly controls your carburetor's fuel delivery at idle and low-throttle operation—the foundation of smooth, responsive engine behavior. If your bike is running rich at idle, hesitating on initial throttle input, or simply won't tune...KM515- SKU:
- KM515
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD DIAMETER METRIC:
- 4.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- UNITS:
- 4 PACK
- BASE COLOR:
- BRASS
- FEATURES:
- FOR VM CARBURETORS
- OVERALL LENGTH METRIC:
- 14.00 MM
- PRODUCT NAME:
- JET
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BRASS
- JET SIZE:
- 15
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
- TYPE:
- PILOT
$14.55 -
MIKUNI Pilot Jet #40 4-Pack VM22/210-40
MIKUNI
$14.55A pilot jet is the unsung foundation of carburetor tuning—it controls fuel delivery at idle and low throttle positions, directly impacting cold starts, smooth transitions, and overall drivability. If your engine stumbles off idle, hunts RPM, or refuses...KM540- SKU:
- KM540
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- BRASS
- HEAD DIAMETER METRIC:
- 4.00 MM
- JET SIZE:
- 40
- OVERALL LENGTH METRIC:
- 14.00 MM
- RIDING STYLE:
- STREET
- TYPE:
- PILOT
- MATERIAL:
- BRASS
- FEATURES:
- FOR VM CARBURETORS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- UNITS:
- 4 PACK
$14.55 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-60
MIKUNI
$5.20Precision fuel metering is the foundation of carburetor tuning, and the MIKUNI Super BN Series Pilot Jet directly controls your engine's idle and low-throttle response. If you're experiencing rough idle, flat spots off the line, or inconsistent fuel...KN10060660- SKU:
- KN10060660
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 60
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- PILOT
$5.20 -
MIKUNI Needle and Seat 786-46001-3.0
MIKUNI
$24.15A properly functioning needle and seat assembly is critical to fuel delivery precision and carburetor reliability—without it, you risk fuel starvation, inconsistent jetting, and poor throttle response. The MIKUNI 786-46001-3.0 is a genuine OEM...7864600130- SKU:
- 7864600130
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
$24.15 -
MIKUNI Needle and Seat 786-46001-3.3
MIKUNI
$24.15The needle and seat assembly is the critical control point in your carburetor's fuel delivery system—when it fails or wears, your jetting becomes unpredictable and performance suffers. A genuine Mikuni replacement ensures precise fuel metering and...7864600133- SKU:
- 7864600133
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$24.15 -
MIKUNI Needle and Seat 786-46001-3.5
MIKUNI
$24.15A properly functioning needle and seat assembly is critical to fuel delivery precision in any carbureted engine. The MIKUNI 786-46001-3.5 is an OEM-quality replacement that restores metering accuracy and eliminates fuel seepage that degrades performance...7864600135- SKU:
- 7864600135
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$24.15 -
MIKUNI Jet Needle J8-7DH02
MIKUNI
$10.50Precision fuel mixture control in the mid-range throttle position is critical for consistent performance, whether you're tuning a stock Mikuni carburetor or optimizing a modified engine. The MIKUNI Jet Needle J8-7DH02 delivers the exact atomization...7DH2- SKU:
- 7DH2
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MODEL:
- J8-7DH02
- PRODUCT NAME:
- JET
- RIDING STYLE:
- UTV
- TYPE:
- NEEDLE
$10.50 -
MIKUNI Jet Needle J8-7DH03
MIKUNI
$10.50The MIKUNI Jet Needle J8-7DH03 is essential for fine-tuning your carburetor's mid-range fuel mixture, directly impacting throttle response and engine performance across your power band. If you're running a Mikuni VM-series carburetor and experiencing...7DH3- SKU:
- 7DH3
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- TYPE:
- NEEDLE
- MODEL:
- J8-7DH03
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
$10.50 -
MIKUNI Jet Needle J8-7DH05
MIKUNI
$10.50Precise mid-range fuel control is the foundation of responsive carburetor tuning, and the MIKUNI Jet Needle J8-7DH05 delivers exactly that. If your Mikuni VM carb is running rich or lean through the throttle's transition zone, a properly matched jet...7DH5- SKU:
- 7DH5
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- MODEL:
- J8-7DH05
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
$10.50 -
MIKUNI Main Jet - #150 - 4-Pack N102221-150
MIKUNI
$14.55If you're tuning a carbureted engine or replacing a worn main jet, the MIKUNI #150 is the precision component you need to dial in your fuel mixture accurately. This OEM-spec jet delivers consistent performance across a range of engine loads and RPMs,...KN102221150- SKU:
- KN102221150
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- JET
- TYPE:
- MAIN
- UNITS:
- 4 PACK
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- JET SIZE:
- 150
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- MATERIAL:
- BRASS
- MODEL:
- MIKUNI
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- WATERCRAFT
$14.55 -
MIKUNI Main Jet - #152.5 - 4-Pack N102221-1525
MIKUNI
$14.55Precision fuel delivery is fundamental to carburetor performance, and jet selection directly impacts your engine's air-fuel ratio across the RPM band. The MIKUNI #152.5 main jet delivers the exact fuel metering your carb requires for optimal throttle...KN1022211525- SKU:
- KN1022211525
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 152.5
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
- UNITS:
- 4 PACK
$14.55 -
MIKUNI Main Jet - #155 - 4-Pack N102221-155
MIKUNI
$5.20If you're tuning a carbureted engine or restoring an OE application, jetting is everything—and a #155 main jet from Mikuni is a precision component that directly affects fuel delivery, throttle response, and overall engine performance. Whether you're...KN102221155- SKU:
- KN102221155
- 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
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- JET SIZE:
- 155
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- 4 PACK
$5.20 -
MIKUNI Main Jet - #160 - 4-Pack N102221-160
MIKUNI
$5.20If your carburettor is running too lean or you're experiencing flat spots during acceleration, the main jet is likely your culprit. This MIKUNI #160 main jet delivers the precise fuel metering your engine needs for consistent performance across the RPM...KN102221160- SKU:
- KN102221160
- 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
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- 4 PACK
- JET SIZE:
- 160
$5.20 -
MIKUNI Main Jet - #165 - 4-Pack N102221-165
MIKUNI
$5.20If you're tuning a carbureted engine or replacing a worn main jet, proper fuel metering is critical to maintaining peak performance and engine reliability. The MIKUNI #165 main jet delivers precise fuel delivery for CV and Power Jet carburetors, ensuring...KN102221165- SKU:
- KN102221165
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- BRASS
- MODEL:
- MIKUNI
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 165
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- UNITS:
- 4 PACK
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- MAIN
- PRODUCT NAME:
- JET
$5.20Qty in Cart: 0Quantity:Price:$5.20Subtotal:
