Already listed up this stuff in the H-matic section, but just in case anyone here wants the stuff (bought it for this use), have a ghetto setup to run a CB750 in a boosted setup.
> H-matic pistons, will fit 750cc, would also work with the 550cc for a low comp gentelmen's expreess, 9k mileage, drops the compression ratio to ~8:1 with no basegasket by my calcs.
> H-matic rods, same as stock late 750cc but much less stressed, off a motor with 9k miles, come with bolts/bearings.
> H-matic crank, no mains, rod bearings still on rods. 9k on the clock, journals are clean.
> Poor mans CR750 HYVO primary drive conversion setup (stock SOHC4 primary drive, GL-1000 drive gear, GL-1000 drive chain, you'll have got use the cycle-x tensioner).
Also have a spare set of SOHC gears to go with this setup if anyone wants to push some power through them. Can get them "glass beaded for inspection" but I don't recommend it.