Reddit reviews Motion Pro 08-0015 Oil Filter and Clutch Hub Spanner 24mm ID

you'll want some RTV to reseal the cases. honda brand is honda-bond I believe.

some engine assembly lube is good too for the cam and other parts until it gets running and oiled properly again.

If you're taking apart the head, (Actually the tool is needed for reassembly only, to turn/compress the torsion springs into place) there's a special tool honda made to turn the torsion springs that hold the valves in. I just cut a notch in a socket, another guy just put a wrench on it to turn it.

I will also say that the 500t engine is essentially identical to the CB450 engine, and the CB450 service manual is a fantastic service manual. I would recommend you use that to rebuild the 500t engine. All the 500t manuals I found were pretty poor manuals in comparison.

timing gun isn't entirely needed on these bikes if your spark advance works properly, i've found static timing a bit easier for me, but I know my advance works properly.

you'll also need a chain breaker tool for the very long cam chain in the engine, as it has to come off to remove the head. I used a slightly modified bicycle chain tool, as it's much smaller than purpose built ones and I found it easier to use.

When I lapped my valves, the suction cup tool thing they sell was a pain to use. I wound up sticking a rubber vacuum hose around the end of the valve and used that to spin/ move the valve. worked well.

make sure the seal/gasket kit you get has the rubber cylinders for the oil galleys. when I rebuilt mine a few years ago some kits didn't have them.

finally, there is a special socket needed to remove the oil slinger from the end of the crank shaft. You probably won't have to remove it, so you probably won't need it. here is one on amazon. I just bought myself a cheap socket and ground it down to the right shape.

EDIT: changed a couple things.

I did the same thing to my 76 360 (very similar engine). The tricky part was the oil filter locknut.
All i had to do was drain the oil, remove the crankcase cover, pull the centrifugal oil filter (this took a spanner to remove the locknut as shown in the manual), pull the clutch and the shift shaft pulls right out. Have a look at a parts fiche on partzilla or whatnot and it'll give you a pretty good idea.

The spanner can be purchased here for 10 bucks (worth it), or do what i did and spend an afternoon making one from a 12 point 15/16" socket - http://www.hondatwins.net/forums/62-engine-discussion/19731-clutch-hub-nut-socket-how-make-2.html

Overall it was an easy fix and didnt take more than 2 hours for a totally incompetent mechanic like myself.