This 2000 model was totally worn out after 45,000km of hard commuting in the UK [bad weather] and Australia. It now weights under 9kg. [19.5lb]. That cat is deceptive - he is 7kg!! The rear swingarm snapped in 2018 and that was expensive to replace secondhand from Japan [US$300]. Front forks changed too. The other parts are LitePro brake kit and wheels, chainring and headset, not too expensive online, and a carbon seatpost [not really necessary], handlebars, and gear cage. Titanium pedals, but they are too small. Gear mech was good, US$50 secondhand. 20" wheel only works with a narrow tyre. Front is still standard but will change to 20". It seems go about 20% faster than my other standard Birdy.