Answer
Apr 07, 2025 - 09:28 AM
The new iron maiden engine may not be as fast as the phantom 85 but this engine is a heavy duty engine optimized for performance and longevity. The cylinder is an iron blended steel so it is strong and has a longer life span. We don't have upgrade parts for this engine kit yet. Here is the link to the muffler that comes in the engine kit https://www.bicycle-engines.com/ztmoto-performance-2-stroke-exhaust-muffler-for
-im70-iron-maiden-bicycle-engines/
-im70-iron-maiden-bicycle-engines/
