?POWERFUL POWER?The 100cc bicycle engine kit has a powerful 3.5HP horsepower with 100cc displacement, rated at 2kw/h and 3600RPM, offering you with a strong power to accelerate your bike as many as 50km/h prime speed.The high-stress ignition coil sends 12k-25k volts. The spark plug gets that as input in addition to a CDI sets a exact spark timing.