In the early 1970s in Tokyo, young Isami Amemiya reached a turning point, owning a Mazda Familia Rotary Coupe. At that time, Amemiya Motors was mainly a car body and paint shop. And a lot of rotary-engined Mazdas were brought to the shop. Mr. Amemiya was fascinated by the small size and light weight of rotary engines, not to mention their high power and ease of installation/removal. That’s what started the rotary tuning that continues to this day.When tuning a reciprocating engine, honing the cylinder block, polishing the cylinder head, processing valve sheets and pistons etc. all need to be outsourced to a special processor. Either that or the purchase of a lot of specialized and very expensive equipment is required. However, thanks to their simple construction, rotary engines can be tuned with small amounts of equipment and a minimum amount of investment - and a person’s own skill. This is the greatest reason for choosing rotary engines, Mr. Amemiya commented.