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i havent measured the tension on those springs. i did measure the heights and all were the same. it goes back together when the gasket set arrives and if it dont run i will sell it. or give it away. a bloke i know has got a couple of postie bikes. ( so called because they are used by Australia Post ) might do a deal with him and enter a few Postie Bike challenges, where you ride these things across ( or up and down the whole country. ) pic of postie bike...