Well, I assume you mean that your going -1 tooth on the front
?!? Your going to decrease
your acceleration if you go +1 on the front and/or -2 on the back. I think you have it backwards if you're trying to get more oomph out of her. -1/+2 is a big jump though, so be prepared to be cruising down the freeway at close to redline!
Should be straight forward. To get mine off though, I had to break the drive chain. There wasn't enough room/slack in the chain to get the front sprocket off with the chain on it. Even with the rear wheel all the way forward! You may need to do the same thing if you still have the stock endless chain on it.