I am changing my front forks to a set from an F model as well as the wheel to a dual disc Comstar. How much difference in the fender mounts? Should I be looking for a fender as well? While I'm at it I also have got a rear comstar for drum brake. I have the parts from an F model to put a rear disc Comstar on with swing arm hydraulic brake setup. Any problems or is this not a bolt on upgrade? Thanks.. Snowdigger69