Only two things limit what you can do to your bike: your imagination, and your wallet. Do all the work your self you are confident in doing; that will give you a deeper sense of satisfaction you can EVER get from just cutting a check. BUT BEWARE: If you try something and foul it up big time, the bike shop will ding you pretty hard to have them make it right, so make darn sure you can do what you set out to do...
Do not give one ounce of credence to any poster whose avatar rhymes with fart; he has several accounts, thumbs his nose at yahoo and anyone that dare give an answer that requires any thought. Does not know anything about any discipline of motorcycling, does not ride or even own a motorcycle and jumps at the chance to spew anti harley hate, rhetoric and disdain. He has nothing better to do than confound, confuse, and contravene any issue related to harley and their riders and their choice of equipment. He does not think anyone should have the freedom to ride a harley so he must be a fascist, a communist. From all indications has an IQ of around 70, and could not be more than 15 years of age.