Shindaiwa's C4 Technology

Shindaiwa's C4 Technology is the first two-stroke/four-stroke hybrid in the marketplace. It boasts advantages of two-stoke engines: light weight, low cost, and all-position running - even upside down.  The most notable four-stroke characteristic is its torque that pulls under extreme loads.  Although comfortable running at 10,000rpm, the T2500 develops its maximum horsepower at 8,000rpm and delivers its maximum torque at 5,000rpm. That means you can maintain optimum power under load at a lower engine speed, thus increasing engine life and fuel economy. 

The T2500 runs on mixed fuel, the same 50:1 ratio as a typical two-stroke.