Good job with the weight loss, but be careful with your weight weenie addiction because once you start you can't stop. Like someone else said, figure 450 grams is a pound and do the math. You must do all of the homework involved to figure this out by making a list of every single component on your bike and its current weight. Then shop online and use listed weights to see where you'd be after buying each item. My guess is your frame, fork, and wheels are the biggest contributor to the bikes heft.