Dirt Bike Jet Kits and Parts

A stock or mildly modified Kawasaki engine leaves performance on the table—improper jetting robs you of power and creates drivability issues across the RPM range. The DYNOJET Stage 2 Jet Kit recalibrates your carburetor for optimal fuel delivery,...

If you're running stock jetting on your Honda, you're leaving measurable power on the table—even with bolt-on modifications like pipes or filters. The DYNOJET Jet Kit Stage 1 recalibrates your carburetor for optimal fuel delivery, recovering that lost...

If you're running stock jetting on your Yamaha, you're leaving performance on the table—especially once you add even modest exhaust or intake modifications. The DYNOJET Jet Kit Stage 1 recalibrates your fuel delivery to match your engine's actual air...

If you're running a mildly modified Yamaha 4125 with aftermarket pipes or filters, your carburetor jetting is likely holding back performance. The DYNOJET Stage 2 Jet Kit recalibrates fuel delivery to match your modified intake and exhaust, unlocking...

A worn or damaged needle and seat directly compromises fuel atomization and carburetor response, leading to inconsistent jetting and poor throttle control. This genuine Mikuni assembly restores precise fuel metering and ensures your carb performs at OEM...

If you're running a VM-type Mikuni carburetor and want to unlock better throttle response and midrange performance, the MIKUNI Power Jet Kit with Jets MK-406 gives you the tuning capability to do it. This conversion kit transforms your standard VM carb...

A worn or damaged needle and seat directly compromises fuel delivery accuracy, leading to inconsistent jetting and poor engine response across the RPM range. This genuine Mikuni assembly restores precise fuel metering, ensuring reliable performance...

Carburetor tuning is critical to unlocking your TRX500 Foreman's full potential, especially if you've modified your intake or exhaust. The DYNOJET Jet Kit Q115 gives you precise fuel-air ratio adjustments across multiple stages—eliminating lean-running...

Includes instructions and all necessary parts for installation, Redirects fuel flow to improve throttle response, Works with fixed or adjustable leak jets, Eliminates 99% of all throttle bogging, Increases bottom-end performance, Improves fuel efficiency

The DYNOJET Jet Kit 3166 delivers measurable power gains across your DR200S/SE's entire RPM range by optimizing fuel delivery to match your engine modifications and riding conditions. Whether you're running stock components or upgrading filters and...

Carburetor tuning is critical to extracting maximum power from your DR 650S, and stock jetting leaves performance on the table. The DYNOJET Jet Kit (3138) delivers precision fuel-air mixture adjustment across your entire throttle range, giving you the...

Carburetor tuning is critical for extracting maximum performance from your Honda XR650L, and factory jetting rarely accounts for modifications or riding conditions. The DYNOJET Jet Kit delivers precision fuel mapping with fully adjustable stages, letting...

Getting the most out of your KLR650 means optimizing fuel delivery to match your engine's capabilities—stock jetting leaves significant performance on the table. The DYNOJET Jet Kit gives you precise control over air-fuel mixture across the entire RPM...

Carburetor tuning is critical for extracting maximum performance from your DRZ400S, especially if you've upgraded your air intake or exhaust system. Stock jetting leaves significant power on the table and can cause hesitation or bogging under load. The...

Fuel mapping is critical for maximizing power output on modified dirt bikes, and a poorly tuned carburettor wastes your engine's potential. The DYNOJET Jet Kit for your DRZ400/E delivers stage-by-stage tuning options that scale with your build—whether...

Carburetor tuning directly impacts throttle response, fuel economy, and peak power output on your DR350S. The DYNOJET Jet Kit delivers stage-specific rejetting solutions that optimize air-fuel mixture across your engine's RPM range, whether you're...

Carburetor tuning is critical to unlocking your XR650R's true potential, especially once you've modified your intake or exhaust. The DYNOJET Jet Kit provides a fully adjustable solution that eliminates the guesswork, delivering measurable power gains and...

If you're running a WR450F and leaving performance on the table with a stock jetting setup, the DYNOJET Jet Kit addresses the mismatch between your engine and fuel delivery. Carburetor engines are sensitive to altitude, temperature, and...

Carburetor tuning is critical to unlocking your CRF450X's full potential, especially once you've upgraded pipes, filters, or modified your engine. The DYNOJET Jet Kit delivers stage-specific tuning solutions—from bolt-on Stage 1 adjustments to...

Fine-tuning your CRF250X's fuel mixture is essential to unlock usable power across the rev range without sacrificing reliability or driveability. The DYNOJET Jet Kit gives you precise control over your carburettor's jetting, allowing you to optimize...