Is it a very common practice to put flywheel weights on the 450R's? I have an 04 and just got an SFB weight from Ebay. It looks like the tools needed are a flywheel holder and puller. Are any other special tools needed? How hard is it to install? The instructions make it look fairly easy. I've read articles that say that the weights help with low end pull and preventing stalling. Has anyone had any experience with this?