I'm selling my 1978 cb750k and a spare engine and carbs. bike is in good condition but has a rusty mac 4into 1 that didn't fit so cut it up with the intention of re-shaping it. also have a 4 into 2 turnout system courtesy of Loco Leon. undetermined mileage on the in-frame motor, but the usual oil leaks. have spare motor with top end off. re-done head seals etc. 5 angle valve cut. honed bores. new rings, (uninstalled). pistons look good and are within spec. re-built carbs and all gaskets to assemble. the bike has custom paint, (I know..but it's actually not bad) and matching vintage-ish saddlebags. $750 firm, or trade for something smaller and interesting. call randy at 416-621-1363