What engines do you mean?And any of the old air cooled 400s fit easily.
What engines do you mean?
The stock water cooled The gears in the DT are a little taller. So you can mix parts to get different gear ratios. I.E. put the blaster primary and clutch gears in the DT and have slitly taller gears but still have good low end. or vice versa.
A yz490 would have more torque but a banshee would still beat it