Paratactic Double Cylinders with Pistons move up and down bring  high speed of engine and reduce vibration, ensured comfortable  riding of bike .

Chain-drive system is used to avoid noise caused by gears’

rotating.

Using spring automatic tensioning system to adjust tension  automatically according to chain’s stretching, reduce noise of  chain-driving, extend chain life.

Using 9-plates high-precision imported teeth-type chain, with  longer chain life, makes the engine more silent.

Cast Iron Rock Arm bracket is used to efficiently avoid the noise  caused by the change of valve clearance which is caused by shape-  change under high temperature.

Using double carburetors to make sure fuel be mixed and fired  clearly, so that to reduce consumption rate of fuel and improve  emission.

Paratactic Double Cylinder engine with strong power, works  stable.