As for the Type-S engine, the 3—plus-1-port long-stroke power plant offers increased torque in the low to mid RPM range while being easy on fuel consumption. The engine utilises the same updated crankcase, end cap and DLC-coated crankshaft, but comes with a more efficient 22D carburettor for smoother throttle response and greater mileage. The engine sports a low-profile cooling head for an overall lower centre of gravity.
Specification
Displacement ： 3.49cc / 0.213 cu.in.
Bore : 16.27mm/0.641in.
Stroke : 16.80mm/0.661in.
Output: 2.68ps/2.64hp/34,000r.p.m
practical rpm range: 4,000-42,000 r.p.m.
weight : 347g / 12.24oz (TYPE-S) 352g/12.42oz.(TYPE-R)