Shepherd Team ngracing: Sonic ProStock .21

The all new Sonic ProStock.21 3,5ccm on-road engine is designed especially for club and regional racers that are looking for a competition engine for a good price. Additionally the ProStock.21 is easy to adjust and to handle which helps to focus on driving and setting up the car. Equipped with a 5 ports sleeve and a CNC machined flat piston the engine provides great power over the entire RPM range while having a very efficient fuel consumption. The optimized crankcase and the the "knife edged" aerodynamic connecting rod help even more to reduce turbulences inside the engine. A special turbo combustion chamber with a cooling fin and the lightweight cooling head ensure best heat dispersion to keep the engine temperatur at a moderate level. High quality ball bearings and a modern composite valve carburetor with an 8mm aluminium venturi complete this new high competition engine. Available for an entry level price these engine offers one of the best price-performance-ration available on the market. Additionally the engine is legal for the Hobby Cup racing series in Germany with more then 20 races all over the country.

Features:

• 5 port hard chromed sleeve

• CNC machined flat piston

• Aerodynamic "knife edged" connecting rod

• Turbo combustion chamber with cooling fin

• 14mm high quality main bearing

• 8mm aluminium venturi

Technical data:

• Displacement: 3,49ccm

• Max power: 2,50 HP @ 36.000 U/min

• Bore: 16,26mm

• Stroke: 16,80mm