I’m going to buy a 400 thumper 1998-2001 range. I’m trying to get a handle on the differences between the YZF/XR/DRZ. I’m concerned about power, handling, and service. I ride about 1/3 each (trail, desert, mxtrack) Much of my riding is chasing my son on the PW50. I do some occasional novice 40+ racing, but nothing radical. I’d appreciate any thoughts from your experience.