Re: Re: B1 Project Started. Home › Forums › All Things 750 Twin › Projects and Progress › New Projects › B1 Project Started. › Re: Re: B1 Project Started. 27th February 2013 at 12:21 pm #8734 TangoParticipant Managed to fit a New chain It had a New rear sprocket fitted already,So job was a good one. I don’t seam to have a chain guard? Anybody have a spare? or know what fits off another bike?