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Motorcycles & Scooters-KTM50 Adventure Mini, Junior & Senior (19mm Thread Reach)03→08Recommended
Motorcycles & Scooters-KTM50 SX Pro-Junior LC (Beta engine)2003Recommended
Motorcycles & Scooters-KTM65 SX Beta engine (19mm Thread Reach)03→07Recommended
Motorcycles & Scooters-KTM250 EXC (2-Stroke) Ø14mm Plug97→02Recommended
Motorcycles & Scooters-KTM250 SX97→Recommended
Motorcycles & Scooters-KTM250 SX (2-Stroke) Ø14mm Plug03→05Recommended
Motorcycles & Scooters-KTM250 SX06→Recommended
Motorcycles & Scooters-KTM300 EXC97→02Recommended
Motorcycles & Scooters-KTM300 MXC97→02Recommended
Motorcycles & Scooters-KTM380 EXC, 380 SX-Recommended

Triple-Gasket Sealing Process
Virtually eliminates the possibility of combustion gas leakage through the shell. Most other manufacturers only use two seals.

Solid-Copper Core
Produces a more powerful spark with less firing voltage. Other manufacturers use a "copper coated" center core. 

Corrosion Resistant
Zinc Chromate Coating double dipped for maximum protection. An NGK exclusive.

Alumina Silicate Insulator
Virtually pure to insure dielectric and physical strength, as well as heat transfer away from the tip for maximum performance.

Corrugated Ribs
Eliminate "flashover", which can cause misfiring and engine damage, especially in damp environments.