So you broke a cam keyway. Put it back together. Starts. Idles, O.K?

When you rev, it runs like shit.

Sounds to me like your still off on the timing, or you bent a valve.

I'm not positive about a honda, but if its a zero clearance motor. Then when your keyway shit on you may have bent a valve, or valves.

I know with certain Chrysler engines if you are off 1 tooth they will either run o.k. at idle and shitty up higher, or idle like shit and run fine up in the R's.