Yamaha Blaster Porting Templates

Shop Yamaha Blaster porting templates at Ken OConnor Racing. Our porting templates are designed to help engine builders and enthusiasts modify Yamaha YFS200 two-stroke cylinders with greater consistency and precision. Whether you’re building a trail engine or preparing a high-performance racing cylinder, proper port layout is essential for achieving your performance goals.

Yamaha Blaster porting templates provide a reference for modifying cylinder port shapes and dimensions. Two-stroke cylinder porting affects airflow, exhaust timing, transfer efficiency, power delivery, and the engine’s operating RPM range. Proper port modifications can improve engine performance when matched with the correct exhaust system, carburetor, cylinder head, and other engine components.

Cylinder porting requires careful measurement, appropriate tools, and an understanding of two-stroke engine operation. Exhaust port width, port timing, transfer passage geometry, and port edge finishing all influence engine performance and reliability. Excessive material removal or incorrect port shapes can reduce performance and potentially damage the piston and cylinder.

Ken OConnor Racing specializes in professional Yamaha Blaster cylinder porting and two-stroke engine machining. Our in-house machine shop provides trail porting, aggressive trail porting, race porting, cylinder boring, head rechambering, crankshaft rebuilding, and complete engine assembly. Our porting templates are based on hands-on engine machining experience.

Browse our Yamaha Blaster porting templates below. For additional replacement and performance parts, visit The Blaster Store, or learn more about our professional Yamaha Blaster engine rebuilding services.