The Yamaha motor is awesome. 5spd is no issue. Clutch pull is no issue, I never notice. In fact I noticed heavier action on a KTM juice clutch I sat on. I use my WR for everything from hardcore single track to mountain Dual Sporting, HareScrambles, and Enduros. You can ride it off the bottom, mid, or scream it on top. Very low maintenance.
The chassis is another story. It's not bad, stability is great, just doesn't turn well. That is why the GG w/450 motor gives me a woody. Especially with the KYB SSS fork. My lord that would be a wonderfully handling bike.....