fits model: Knucklehead.

( Brand: Bosch ), ( Manufacturer Part Number: M225T1 ), ( Part Type: Spark Plug ), ( Country/region Of Manufacture: Germany )
The Bosch M225T1 spark plug is a high-quality replacement part designed specifically for Rotax Knucklehead engines. This spark plug is a crucial component in the engine's ignition system, responsible for creating the spark that ignites the air-fuel mixture in the cylinder, which in turn propels the engine.
The M225T1 spark plug is a NGK Iridium IX replacement for the Bosch M225T. It features a center electrode made of iridium, an extremely durable and efficient material that ensures long life and reliable performance. The iridium center electrode can withstand high temperatures and provides a more consistent and stronger spark, which can improve engine performance and efficiency.
The M225T1 spark plug also features a nickel-chromium alloy ground electrode, which is resistant to corrosion and provides excellent electrical conductivity. The insulator nose is made of porcelain, which is a high-temperature ceramic material that provides excellent insulation and durability.
The M225T1 spark plug is designed for use in a displacement of 747 to 850 cubic centimeters (45 to 52 cubic inches) and has a heat range of COP-PR10. This heat range is suitable for regular driving in all seasons and provides a good balance between ignition efficiency and resistance to pre-ignition.
In summary, the Bosch M225T1 spark plug is a high-quality replacement part for Rotax Knucklehead engines that features an iridium center electrode for long life and reliable performance, a nickel-chromium alloy ground electrode for corrosion resistance and excellent electrical conductivity, and a porcelain insulator nose for durability and insulation. With a COP-PR10 heat range, this spark plug is suitable for regular driving in all seasons and provides a good balance between ignition efficiency and resistance to pre-ignition.
Pros of buying M225T1 NOS Bosch spark plugs for Rotax Knucklehead:1. Authenticity: Bosch is a well-known and reputable brand in the automotive industry, ensuring high-quality products.
2. Longer Life Span: These spark plugs are designed to last longer than standard plugs, reducing the frequency of replacements.
3. Improved Performance: The M225T1 NOS spark plugs can enhance engine performance, leading to smoother operation and better fuel efficiency.
Cons of buying M225T1 NOS Bosch spark plugs for Rotax Knucklehead:1. Cost: Compared to standard spark plugs, NOS (New Old Stock) parts like these can be more expensive.
2. Availability: These NOS parts may be harder to find in local stores, requiring an online search or special order.
3. Potential Compatibility Issues: While Bosch products are generally compatible, it's essential to ensure these plugs are suitable for your specific Rotax Knucklehead model.
Conclusion:Despite the higher cost and potential compatibility issues, the benefits of buying M225T1 NOS Bosch spark plugs for your Rotax Knucklehead make it an attractive option. The longer life span, improved engine performance, and the backing of a respected brand may justify the investment for many enthusiasts. However, before making a purchase, be sure to confirm the plugs' compatibility with your specific Rotax Knucklehead model and consider the availability and cost of alternatives.
These have the 18mm thread with removable tips. Boxes are dirty but plugs excellent new old stock condition.
Shipping USPS priority mail new old stock Bosch spark plug box lot of 51 fifty-one M225T1 plugs. All made in germany with 49 original Bosch boxes.