tiger,
So with decompressor removed and and a spark plug inserted into the decompressor valves port.
You still have a jerky pull on the start rope.
What you are feeling now, is the normal compression of the engine.
Remember the valve is there for an effortless start.
When stripping and cleaning the decompressor, make sure the diaphragm is sealing against the metal plates that sandwich it, the plates mating surfaces need to be smooth and clean.
