I would like to reduce the weight of my DR-350SE and the only ways that come to mind are 1) Replace the battery with a Lithium Ion battery. 2) Replace the stock exhaust system with an aftermarket system. 3) Replace the stock gas tank with a plastic tank. I don't think that any one of these changes will result in a significant loss of weight, but they are the only places I can see to reduce the weight of the bike. Any thoughts on this subject will be appreciated!