Features:
- The crankcase, cylinder sleeve and piston materials are optimized for uniform expansion to improve durability and reliability
- 4-port ABC cylinder
- Balanced Max-Flo™ crankshaft with Class 5 precision bearings
- Machined 7075-T6 aluminum con rod with double bushings
- Unique, compact 40spring header attachment design
- Includes a high-performance O’Donnell #99 glow plug

The carburettor on the Super Sport .21 has all of these advantages:
- Aluminum body
- Thermal insulating sleeve that prevents vapor lock
- Low- and high-speed needles with double O-rings on both
- Hard anodized slide barrel
- 7 mm and 8 mm restrictors included

Specifications:
- Practical rpm range: 3,000-42,000
- Output: 2.7 hp @ 36,000 rpm