[yorkie_chris]

Usually a stinkers can is quite small, you need what's called a stinger on the end of the expansion chamber to cause the resonance, that's effectively the link pipe and the diameter is tiny. Not suited to a 4 strokes gas flow at all.

Bear in mind that a 2" I/d can, can restrict flow on a tuned engine, some big twins run twin 60mm I/d pipes. Looking at the road, untuned cagiva in the garage the "linkpipe" is about 20mm wide. It may be a little strangled!