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That's a tough one Dick.

I guess only time will tell. I personally hope they do as they have a great product.
1. Clean (E-Tec)
2. Lightweight as compared to 4 stroke
3. Way less moving parts than a 4 stroke
4. Less maintenance than a 4 stroke
5. Better hole shot that the 4 stroke

Just to name a few advantages.
I personally like the E-Tec over any other 'Clean' engine.