SOHC.co.uk Forums > CB500/550

Question to people who have vapor honed their engine

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alexdecker:
Hey all

Getting my stuff vapor honed this week. All the engine parts. Can you guys help me with a list of all the oil passageways and other narrow places I have to pay special care to during the cleaning of the engine afterwards? I just wanna make sure I get all of them, and don't accidentally forget something.

Also, I considered if I could use plummer's putty to block all the passageways? Or what would people recommend for blocking them?

Sesman:
I used wood pegs and hot wax. Block every oil way you can see.

alexdecker:
Also, this might seem like a stupid question, but only the outside gets blasted, right?

Laverda Dave:
Make sure you tell the person doing the work NOT to blast the inside of the engine especially the shell bearing surfaces otherwise you might have a pile of scrap on your hands. The bearings are measured to such fine tolerance limits blasting of the surface will make the tolerance bigger.
As has been said before, only use someone who a) knows what they are doing and b) is used to vapour blasting Japanese engines. If neither of the above walk away.

Oddjob:
The powder coating people use silicon bungs which are left in when the engine is cured as they can withstand the heat.

You can buy them off Ebay in a variety of sizes.

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