I have some Chinese Hi & Miss motors that I have modified a little.
Firstly my first engine.
An Enjomor 6 cc Hit & Miss engine.
The problem with this engine is the inertia of the intermittent control. The tension spring of the centrifugal weight switch cannot be adjusted. As a result, the engine turns too quickly and the cut-off control works too slowly.
To dampen the spring a little, I made a bridge over the breaker lever with an adjusting screw and a small spring that works against the centrifugal weight spring. This reduces the speed a little and relieves the centrifugal weights.
I also fitted a shut-off device to the petrol tank. Previously, the tank ran empty via the carburettor.
I fitted a roller to make it easier to start the motor. The tapered bushes of the wheel mounting could not be loosened afterwards. That's why I put forcing screws in the flange of the bushes.
I replaced the original oil cup for cylinder lubrication with a sight oiler.
You can also see the engines on my Youtube channel.
https://www.youtube.com/@Jailguzzi