...in trying to abide by the rules, I have done a couple of searches and as usual can not find what I need to know. I just purchased a 05 WR450 this weekend...the bike is used but looks to be in really good shape. I just noticed that the coolant reservior tank is missing...so I e-mailed the owner and he informed me that it was removed when he got it back in 05 to get rid of any extra weight, and that the bike has never run hot. My question is...is this ok or do I need to buy one and put it back on the bike. Thanks in advance!