i would just like to know from people if they have done this befor and if it is worth it ?

If you like your bike then the answer is yes - there is a big difference is power between an 883 and a 1200

have youherd of any one doing it and being happy with it ?

There's been a few threads covering this, but KCs is the best start:  www.hdforums.com.au/Default.aspx

Thank you for the help bogs ill let u know how I go