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Description
Take your performance to new heights with a Jet Kit for your vehicles. Increase power and improve performance throughout the entire RPM range, while improving throttle response and smoothness. These Jet Kits take the guesswork out of tuning your vehicles.
Whether you’re rolling with a stock vehicles or you’ve made some modifications, our Jet Kit will optimize your air/fuel ratio to eliminate rough spots and help you take control of your vehicles’s power. You can go with a Stage 1 Jet Kit to give your stock engine a 5% boost of horsepower or send it all the way up to Stage 3 if you’ve already made major modifications to your vehicles.
STAGE 1 DETAILS
Perfect for vehicles with a stock engine using the stock airbox, air filter, and pipes. Stage 1 Jet Kits are engineered to improve throttle response and deliver approximately 5% more horsepower than stock. These kits are fully adjustable to allow the use of well-designed aftermarket pipes and stock replacement air filters, like K&N.
STAGE 2 DETAILS
If you’ve made slight modifications to your vehicles, but still crave more performance, a Stage 2 Jet Kit is the solution. With a Stage 2 Jet Kit, you could see power gains of approximately 8%. This kit is intended for vehicles with stock or mildly tuned engines using a well - designed aftermarket pipe with a modified airbox and a stock replacement air filter.
FEATURES
- 5-8% power range.
- Fully adjustable.
- Increases power and drivability.
- For carbureted vehicles only.
Technical Specifications
- MFG. Part Number 3243
Vehicle Information
Yamaha WR250F Dirt Bike (2001-2026)
The Yamaha WR250F, produced from 2001 to 2026, is a renowned off-road motorcycle designed for enduro riding. Throughout its history, it has consistently featured a 249cc liquid-cooled, single-cylinder, four-stroke engine, with continuous advancements in technology and performance. While generally offered as a single model, the WR250F has undergone several significant generational updates rather than distinct trim levels. Key evolutions include the introduction of an aluminum frame in 2007, a major shift to fuel injection, a 4-valve "reverse" engine, and a 6-speed transmission in 2015. Subsequent updates in 2018, 2020, and 2025 brought further engine refinements, chassis redesigns, enhanced ergonomics, and the integration of advanced features like the Power Tuner app and selectable Traction Control. These changes have consistently aimed to improve handling, power delivery, and rider experience, solidifying its position as a top-tier enduro machine. FAQ:
Q: How do I find parts specific to my WR250F?
A: Please use the year and edition selector on this page to ensure compatibility with your specific model.
Maintenance
| Component | Interval | Details |
| Engine Oil | 5 to 10 hours or 3,000 km (2015+ models for less aggressive use) | Change every 5 hours for aggressive/race riding, every 10 hours for recreational riding. |
| Oil Filter | With every oil change | For newer models, some sources suggest 1,000 km or 7.5 hours. |
| Air Filter | Clean and re-oil every 5 to 15 hours | Every 5-10 hours for aggressive/dusty riding, every 10-15 hours for recreational riding. Replace if damaged. |
| Spark Plug | Inspect annually, replace as needed | For 2015+ models, check condition, adjust gap, and replace if necessary. |
| Coolant | Every 2 years | Annually for aggressive riders. Use coolant formulated for aluminum engines. |
| Drive Chain | Clean and lubricate every 5 hours | |
| Valve Inspections | Every 15 to 30 hours or 5,000 km (2015+ models) | Every 15 hours for aggressive riding, every 30 hours for recreational riding. |
| Top-End Inspections | Every 30 to 60 hours | Every 30 hours for aggressive riding, every 50-60 hours for recreational riding. |
| Bottom-End Inspections | Every 50 to 120 hours | Every 50-60 hours for aggressive riding, every 100-120 hours for recreational riding. |