Ohlins TTX36 is roughly 3.5 kg and is fitted with billet preload grip and aluminum bolts . I have no scales except bathroom , and I jumped on dressed at 121kg , and got 124.5 . I also weighed the equivalent top model specified for Gen 1 Busa , Ohlins SU406 , and that came up slightly under 3.5 kg , more like 3.4 kg . Best I can do , and yes ... I might get myself some better scales for xmas , and I will try again then .