Topic: CB750 Motor rebuild... for dummies

[lucky]

There are two screws under that timing chain cover on the top of the valve cover that prevent the valve cover from coming off.

You need to remove that timing chain cover to get access to the two final screws holding on the valve cover.

You should have a shop manual . Get that now, or suffer the consequences.

[lucky]

Okay, so I just read this whole thread in one sitting and am pretty overwhelmed. I got a '77 cb750 in the beginning of this season for cheap money which I thought was in great condition. I was planning on rebuilding the engine and going through the entire bike nice and slow, but I'm gushing oil out of the engine (neighbors have started leaving me notes) and I'm afraid that I've got to tackel the engine sooner than I had hoped. I'm working a 9-5 and full-time in school, so I was just hoping to get this thing through until may when I'm done with school and had some time to tinker.

My question is, realistically, can I complete a top end engine rebuild in a weekend (I'm a complete nube and only have the internet, a shop manual, and a clymer's manual). Or, is it more likely than not that I'll come up with many of the issues that have been documented and I'll need to go back to ebay or another seller? Thank you for taking a minute to reply to my silly inquiry, I'm sure I'll be back with pix and all kinds of frustrations.

Your priorities are WRONG. You have the shop manual THEN the internet.
The shop manual is MORE important.

You MUST use the workshop manual to take apart the engine. Forget the internet.

[lucky]

So since this is an engine rebuild thread lets get a noob question of mine out of the way.

Why do you have to hone a cylinder and replace piston rings? What happens if you dont?

Good source to buy rings? and maybe a DIY honing page? (I'm sorta at this point in my engine rebuild.)
And while I'm here.

If you do not hone the cylinders and replace the rings it will smoke a lot and never quit smoking. Other wise it never breaks in. Just gets a glaze on the cylinder walls.

That piston is not scored very badly at all. Nothing.
Just hand sand it with some 600 carborundum paper and clean thats it.

Do not use a wire brush on a piston. It will be ruined.

[oldskullero]

Hi guys, how do we subscribe to this topic?

[Terry in Australia]

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