DETAILS, FICTION AND BIKE PART NAMES

Crankshaft is intended to change linear (up and down) movement of piston into rotational motion. Solid metal is accustomed to make this part and it can be machined by CNC equipment and well balanced to precision. This interprets to lower torque on the bottom close on the engine power curve but similar leading speed on the best conclusion. 80cc/66c

Freehub: a ratcheting assembly onto which a cog or cassette is mounted that enables the bicycle to coast without the pedals turning and enables turning the pedals backward though Using.A tandem twin is effectively a pair of geared singles, and is particularly to get distinguished from an inline twin like the Sunbeam S7. Tandem twins are appropriate