About MJK - MJK Performance (formerly known as Mad Jap Kustoms) started in 2007, we are a family owned and operated business located in Calgary, Alberta, Canada.  MJK Performance has a solid reputation in the North American motorcycle industry and is known for our high-quality standards and customer service. We are one of the industry leaders and innovators in aftermarket Harley-Davidson® motorcycle parts manufacturing in Canada.

Our specialization; aftermarket products for Harley-Davidson® motorcycles. All of our products are designed, engineered and produced in-house on our state of the art Matsuura MX-330 5 Axis CNC Machine, True 5 Axis HURCO CNC Machine and HURCO Turning Center CNC Machine.

We are passionate about providing the motorcycle consumer with a better looking and longer lasting aftermarket Harley-Davidson® part for their motorcycle. Our parts are made from high-grade aluminum, stainless steel and titanium with adherence to precision and quality.  Each part is crafted with attention to functionality without compromising style.

We feel the devil is in the details and is what sets us apart.