Hello Thumpertalk, Long time reader of all these posts. Great information. I have a 1999 WR400. I am looking to invest some money to modifcations this winter. The bike is totally stock except for the free mods and an GYTR exhaust baffle. So here are a few items that I want to change. Which Mod would make the greatest impact for this bike? 1. Tank and Seat combo 2. Steering Dampner 3. Fully modified suspension 4. Some type of motor change (420 kit, flywheel, lighting,etc.) The better half has pretty much put a limit of $600.00 for the change. I am a casual rider that maybe goes out 2 or 3 times per month. I am located in the northeastern U.S.