Moto-House Power-Up Kit - Pro Circuit 2003-2026 Yamaha YZ250 YZ250X

The Ultimate YZ250 Power Up Kit

If you’re still riding a Yamaha YZ250, congratulations—you own the last of the Mohicans. But let’s be honest: while the blue smoker is a timeless masterpiece, the stock pipe and reeds are beginning to feel a bit like yesterday’s news. If you want to stop getting roosted by modern four-strokes and start barkin’ off the gate, you need the Moto-House MX Power Up Kit. This isn’t just a box of parts; it’s a direct injection of adrenaline and "Works" performance designed to make your YZ250 run as good as it looks. Moto-House MX curated this specific Heavy Duty combo to ensure you get more over-rev and crisper throttle response.

This kit centers around the Pro Circuit Works Champ Pipe—the unplated, oiled-metal masterpiece that screams "I know how to use a Scotch-Brite pad." Paired with the shorty R-304 Silencer, you aren’t just gaining horsepower; you’re gaining Racing Performance that is flow-bench proven. We’ve included the VForce 4X Reed Valve to eliminate the lag in your low-end and the Twin Air dual-bonded filter to ensure the only thing your motor breathes is clean, high-velocity oxygen. It’s lightweight, rugged, and built for those who treat the track like a battlefield.

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Performance Gains: What to Expect

• Broad Powerband: Noticeable horsepower and torque gains that pull significantly harder from the bottom and scream through the top-end.
• Instant Throttle Response: The VForce 4X reed system eliminates "lag" and low-end bog for a more connected feel between your wrist and the rear tire.
• Enhanced Over-Rev: The Pro Circuit Works pipe allows the motor to breathe deeper, letting you stay in each gear longer before hitting the wall.
• Maximum Air Intake: Flow-bench proven VForce 4X reed systems combined with Twin Air technology ensures your engine isn't suffocating, even in the deepest loam or sand.

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Top Features: Moto-House MX Yamaha YZ250 Power Up Kit

• Works Champ Pipe - 0732525: Increased horsepower and torque across the entire RPM range with an unplated "Works" finish for maximum style.
• R-304 Shorty Silencer - SY03250-RE: Compact aluminum canister designed for optimum gains and a distinct, aggressive race bark.
• VForce 4X Reed System - V4X07EM: All-new reed petal resin system that significantly improves throttle response and bottom-end pull.
• Twin Air Dual-Bonded Filter - 152213X: Two layers of foam fused together to trap the smallest particles while increasing airflow.
• Easy Maintenance: The R-304 features hex head screws for quick repacking, and the Twin Air filter is sized for easier airbox swaps.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2003 - 2026	Yamaha	YZ250
2016 - 2026	Yamaha	YZ250X

Frequently Asked Questions

Q: Does the "Works" finish on the pipe require special care?
A: Yes. Because it is unplated, you should spray it with a light coat of WD-40 or similar penetrant after washing to prevent surface rust.

Q: Is the R-304 Silencer spark arrested for trail riding?
A: No. The R-304 is a closed-course racing silencer designed for maximum performance gains.

Q: Do I need to re-jet my carburetor after installing this kit?
A: Most riders find that stock jetting is a great baseline, but slight air screw adjustments are recommended to tune for the increased airflow.

✨Jetting Note: To play it safe, we suggest starting with your Stock Jetting (Main: 178 | Pilot: 50 | Needle: N3EW | Clip: 2nd | Air Screw: 1.0 | Power Jet: 50). However, for peak performance with this pipe, Pro Circuit recommends the following Race Specs: Main: 175 | Pilot: 48 | Needle: N3EW | Clip: 2nd | Air Screw: 1.5 | Power Jet: 50 | Slide: 7.0.

Upgrade Your YZ250 today and feel the difference that a professional-grade Power Up Kit makes! You can also add cylinder & head work at a later time and this kit will perform even better.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The best motocross shop in Central Florida.