Includes: PTR Pipe, Fat Boy 2 Silencer, NATIONAL Porting, Powerhead, Pyramid Reed Valves, Pre-Jetted Keihin 39mm PWK Carburetor, Jet Kit, K&N Filter, T-Shirt, Instructions , DR Tech Support.


Power Curve: Midrange (Midrange Power Emphasis)

Performance: 60-70% Upgrade over stock

Reliability: 80% of stock reliability

Riding Application: The National kit is extremely versatile, Power band is strong across the board. Works great for Dune Riding, Trail Riding, Excellent All Around


Pipe Option: PTR Pipe enhances Power throughout Powerband. Increase Rev by over 2000 RPM's.
Because PTR Pipes make power gains so well across the Powerband, only one type of PTR pipe is available.
Cores Required: Cylinder. Customer must send in their cylinders to DRI for porting modification or purchase rebuilt cylinder (call for details)
* Price for cylinder is PLUS any modifications and piston, studs, gasket, etc.
Multiple Compression Options: Powerhead is designed with interchangeable domes. Domes sizes are available for all riding elevations.

**Kit prices are PLUS any necessary machining and or parts.
Example: Boring, Gaskets, Pistons, etc. is additional cost.
Throttle and or throttle cable not included.


Duncan Racing's Complete Engine Performance Package for the Suzuki LT 500