@Gary.....I go against the grain on this compared to most , so take that the way you want too. I find myself getting tired , more quickly on the big 4 strokes , compared to my 2 strokes. It is the main reason why I've some what converted back to riding the 2 strokes.
What I've been dealing with as of late , as far as testing new bikes out for next season...
450's....to fast and to much torque for me any more.
350's....Kind of in the same boat for me as the 450's , and on top , they are just as fast as any 450 I've eve ridden.
250F's.....Haven't been able to spend time on any of these newer ones the past 3-4 years ( that's coming )
Last but not least.....
250 2 stroke....Need to test a new Husky TC 250 before I make my mind up. I love my 17' TC 125 , so in theroy I should actually dig the TC 250 a lot. My 06' RM 250 is awesome in every way.....but if I could have the same chassis as my TC 125 , with newer 250 2 stroke power under me....I don't know if there would be a better bike on planet earth ( for me ).
All depends on how you ride , what you ride and where you ride it. Fit and feel is everything. Don't go by shootout's and so forth...go with what your gut tells you.
" And there goes Jeffro. One of God's own prototypes. A high-powered mutant of some kind never even considered for mass production. Too weird to live, and too rare to die.”