Well, thats all we got down here..old hondas are hard to come by, especially superfours, and 350 twins. even today, kawasaki have the highest capacity in the market. 250 cc . after that its a giant leap to R1's, harleys and KTM's. however, i use CB because the design of the engine it self have not changed since the seventies. I am a big fan of CB 100, it is a great city bike, and the engine have evolved yet still have the same platform, you can use the left engine block and mix it up with any old honda singles ranging from cb 100, cb125, gl100, gl125, and even the newest hondas in the market. the platform is still the same but improved in gearbox, charging, capacity, valvetrain, drivetrain, ignition and so on. so i usually get a donor bike costing around $150 such as CB125 K3 and only use the frame, left engine block (the one with the serial number) everything else i get at the wreckers. maintaining original OEM parts but newer and more reliable. thats why i could keep the cost down. the problem is, its hard to find tanks that are in good shape. Old Cbs have the same weakness in their tanks. prone to corrosion and rust. here are some of the build pics. the pics arent so great cuz i took it using a nokia.