I am just in the middle of a filter, carb rejet, new battery box change and theres bags of room to fit those on.. 54mm though, ours are 52
I bought some cheapy K&N look a likes off a website and I shall post a picture once its all done, unable to complete the project as the wife has bought me a powder coating kit but Im not allowed it till my 50th which is tomorrow.
TrOjAn