Yamaha SR500 TT500 XT500 | Mikuni TM38 Flatslide Carburetor | Non-Pumper Carb Kit

The Mikuni TM38 Flatslide Non-Pumper Carburetor Kit is a smart, budget-friendly performance upgrade for your Yamaha SR500, TT500, or XT500, delivering noticeable improvements over the stock VM round-slide Mikuni carbs—without the higher cost of a full TM pumper setup.

• Non-pumper flatslide design — Offers superior throttle response and airflow compared to round-slide VMs, with crisp acceleration and smoother power delivery.
• New rubber engine mounting flange — Positions the carb closer to the cylinder head for better fitment and clearance.
• 1/4-turn quick-action throttle + nylon-lined cable with 90-degree lower fitting — Ensures smooth operation and accommodates tight spaces on certain models.
• Pre-installed jets + spares provided — Start with optimized settings for Yamaha 500 singles; includes extras for fine-tuning the main circuit.
• Tuning considerations: Adjust for climate, altitude, fuel octane differences, or mods like cams, exhaust, or head porting. The included jet selection covers a wide range of variables for reliable results.

Note on air filtration: Like VM carbs, the TM38 does not fit the stock airbox—plan to add a separate paper or foam POD filter (sold separately) for proper intake.

Performance Gains:

• You'll feel the difference right away: sharper throttle snap, quicker acceleration, stronger mid-range pull, and overall enhanced rideability. It's a reliable step up for vintage thumpers, trail bikes, cafe racers, or lightly modified engines.
• For maximum performance (especially with bigger mods), check out our TM36 or TM40 Pumper options for even more snap via the accelerator pump.
• Installation is straightforward for experienced owners—many report excellent out-of-the-box results with minimal dialing in. Questions on fitment, jetting, or POD filters? contact us