The bike is stock with the free mods done. Needs tires and chain as they are all original. What do you recommend for bike protection (skid plate etc)? What are the general must do mods (other than the free mods)? The bike is in California if that matters. Will be used as a trail bike and NOT a race bike. To be used for single track trails. I am 6'1" and weigh about 210. Thanks for any suggestions.