Another Unholy Union rebuild on a R100GS: Donor is a low mileage one owner bike that had been stolen and vandalised by kids. The original owner kept it for years in the hope of rebuilding it, but never got round to doing it. TAG aluminium extended monolever, bitches: The beast: R100GS base engine, Moorespeed 1000cc long skirt pistons+valves and balanced OEM crank. I have the Moorespeed pistons on my 100GS city ride and really love them. Waiting to see how the valve changes affect the feel and esp looking forward to trying out a balanced crank.