i was thinking ktm 440 in a ktm 300 frame, it already has the angry porting too, it would destroy 450s
the 450 will have less power and will be harder to start, and will be heavier, but to make up for it it will require more maintenance.
4stroke=dead fish
I would also think that that much extra CC on the 250 trans would cause problems....now, a Sabertooth 500 top end grafted to the CR500 bottom end would be a wicked ride......
2000 CR250, pipe, filter, Vforce
1980 XL80s
1969 Broncco TX-6
Natural selection favors Smart people, so nature selects morons to be slow and dumb for tigers and stuff too eat. But in our modern world there just aren't enough tigers.