DYNOJET Jet Kit - Yamaha FZ1 4170

Fine-tuning your FZ1's fuel mixture is essential to unlock hidden performance and improve throttle response across the RPM band. The DYNOJET Jet Kit eliminates the guesswork of carburetor jetting by offering fully adjustable calibration—whether you're running stock components or a modified setup. With stage options ranging from mild 5% gains to race-focused 15% increases, you can dial in exactly the power and drivability your engine demands.

This bolt-on kit addresses a common limitation of carbureted Yamaha FZ1s: factory jetting that prioritizes emissions and smooth idle over performance. By adjusting needle position, jet sizes, and air-fuel ratios, you'll achieve better fuel economy, crisper acceleration, and reliable operation across diverse riding conditions.

• Manufacturer Part Number: 4170
• Application: Yamaha FZ1
• Stage 1: ~5% power increase
• Stage 2: ~8% power increase
• Stage 3: ~10-15% power increase
• Stage 7: Race-only application
• Fully adjustable calibration
• Compatible: Stock/modified engines
• Compatible: Stock/modified filters
• Compatible: Stock/modified exhaust
• Installation: Bolt-on (carb removal required)
• Material: Precision-engineered jets
• Street and track capable