If i were you i would go there with a compression tester to check out those cylinders. If its a 2000 with some hours on it and the guy just honed it and threw in a new set of piston and rings that might not be the cure. How many Hours on the top end? 3 rides at 4 hrs a ride is 12hrs so that matters. Walk around the bike and check all the bearings, a-arms, front wheel bearings, just wiggle the wheels back and forth and look for slop, rear axle bearings, lift up rear end and shake side to side look for slop. how long has it been on the clutch? Check out the sprockets for wear. If everything is in good shape 1500 to 2000 right now around here. Id lean more toward the 1500 mark.