Im looking into purchasing a y2k WR400 (new) 1.Could you tell me what the flywheel weight does and does this need to be done? 2.Should the stock tail pipe be replaced right away. 3.i am fairly short,will i find the WR trouble to start? 4.Is there anything else you can tell me that needs to be changed or looked at from new. Thanks for your help...and Great Site!