Man i love "ish" bikes.
The transmission is MUCH better offroad than the stock YZ. I may still drop a tooth on the countershaft sprocket since 5th gear is taller than I need anywhere but on on the highway and it wouldn't hurt to gear down a slight bit more in 1st.
Just to confirm, you did set the rear sag and also confirmed that the fork springs are for your weight?I need some more seat time before I decide on revalving. I had my WR-450 completely revalved by a RaceTech distributor and so far, I'm liking the YZ suspension even better.