Well just got back from my 2nd ride on the 03 WR. The type of riding I do is very tight woods with rocks, roots & mud carved out of the side of a steep mountain usually in the rain being on the wetcoast of Vancouver B.C. Canada. 1st gear stuff 90% of the time. My 01 Wr 250 has skid plate,cut down bars, bark busters, YZ timed , FMF Q, air box lid removed BK mod . Starts and runs great. I really didn’t need a new bike but don’t tell the wife that. In my previous post I weighed both bikes on the same bathroom scale in the same manner and found the 03 to be 2-3 lbs heavier. I pulled the seat off and lifted the battery and found that most of the weight was there. Any aftermarket lighter batteries? Kick starting this bike was so much easier, now I know why you all rave about the 03 cam swap. To e start just push the ignition power switch on ( located behind the # plate next to the odometer ) and then the start button and away she goes . In gear with clutch in no problem. Jetting is good with exception of a slight hesitation off the bottom .I did not notice this riding, just in the garage. Will swap over my FMF Q before I play with the jetting. I did not notice any ¼-1/2 throttle hesitation mentioned with the YZ’s Clutch pull is harder (YZ springs?) but very smooth action as is the shifting. Front forks and rear suspension is stiffer than the 01. Manual says forks have the same spring rate 0.44 kg/mm but the rear spring is 5.00kg/mm for the 03 and 4.80 for the 01 (Europe gets 4.7 and Aus gets 5.1for rear and .42 and .43 front) Good action just stiffer. Tank seat combo is probably the best change.This alone makes the bike feel lighter. Great ergonomics. Back brake is more powerful than 01 with nice feel. Dunlop 739 on both ends , front is junk. Can’t wait to put S12’s on it. I lowered the front end to the 2nd line on the fork tubes to get better bite . My 01 will over heat in the gnarly stuff when I use the clutch a lot ,the 03 seemed fine. I was very leary of the new air box sealing but a wet ride today showed no leaking . I would still be hesitant on deep water crossings. (good accessibility though) With knowing the performance gains of the open 01 air box I hope the 03 can be modified while retaining the water proofing . The bike is a tractor in the tight slippery stuff, maybe it’s the WR timing or the 03 cam either way it it just motors up with out a hint of stalling . On the open trail it pulls hard but I know there is more with a pipe, air box mod and possibly YZ timing. I didn’t really think I needed the e start and I don’t think I’m a p***y but at the end of the day when you crash or stall in a really tough section you will appreciate the ability to just push the button and go. I used it 3-4 times today and just loved it.The bike felt the same or lighter than my 01 so no problem there. Riding MX or fire roads you don’t need it but for the riding I do it works for me. To put it in a nut shell the main improvements are the seat tank combo, the new cam and starting and maybe just maybe the e start.