I find this far fetched. Until a dealer can tell me they guarantee an engine for 20000km a 2 stroke will be a 2 stroke and a 4 stroke will be a 4 stroke.. no in between.
Although I would love for this to be true.. Obviously everyone with 4 strokes would be going 2 stroke.. I just can't see it happening.
Not even a Yamaha dealer will guarantee your engine will last 20,000km. 4 years, yes, 20,000km no.
I don't think 2-strokes will ever be 100% as reliable as 4-strokes but the fact that they are making huge strides to bridge that gap is awesome.
There's still something about the sound and torque characteristics of a 4-stroke that puts a smile on my face.
It's a great time to be a snowmobiler!