I did a bit of poking around on Australian EBay & nearly spat out my beer, jeez - the price of SOME used parts , gee I wish I put this under cover the day I got it. ! : $498 for a restored Engine ( bet its not souped like my Tecumseh 4.0hp - that 20mm S90 Keihen Carb & millied/relieved block n head & reground Cam with Ford Isky Grind & LCA on the Can really gave the Exh note a sharp bark) - Got a Top of the line bike. But the big 172cc Tecumseh Engine, weird...Found a repro Advert from the 70's if anyone finds interesting (I did) + a sample of used parts column.. $40 for a rear sprocket ! & the handlebars aren't even the CHROME ONES like mine, & the base-model bolt ons not the Chrome fold down:$150AU smackers !.