My first project - 1974 CB360 K0

[Bryanj]

I agree with Ash thats a casting flash, cam and head in very good condition, if you cant get better rockers they will run as long as you are not racing!

[Craizeehair]

Thanks Bryan, I’m really pleased with that.

[McCabe-Thiele (Ted)]

Yes casting marks can appear very scary when you first find them.
It all does look pretty good.

[K2-K6]

My view of the rocker faces, they definitely need attention....Newman cams a good place to have them repaired and reground to specification.

The pitting on them directly wrecks the oil film that's supposed to keep the materials apart (follower and camshaft) with likely a short life thereafter. This is often the result of poor oil condition from servicing and or, dilution of the oil from petrol contamination, short journeys etc.

Generally looks pretty clean and good condition in there.

Agree with casting marks,  the method of die-casting has a jigsaw puzzle of moulds to form the shape in which to cast, when opened to get the crankcase out then imperfect mould joints leave these characteristic split lines where those joints exist. Not detrimental at all.

[AshimotoK0]

My view of the rocker faces, they definitely need attention....Newman cams a good place to have them repaired and reground to specification.

The pitting on them directly wrecks the oil film that's supposed to keep the materials apart (follower and camshaft) with likely a short life thereafter. This is often the result of poor oil condition from servicing and or, dilution of the oil from petrol contamination, short journeys etc.

Generally looks pretty clean and good condition in there.

Agree with casting marks,  the method of die-casting has a jigsaw puzzle of moulds to form the shape in which to cast, when opened to get the crankcase out then imperfect mould joints leave these characteristic split lines where those joints exist. Not detrimental at all.

What do you reckon to the arrowed areas on this shot of the cam lobes please Nigel? Is that due to oil starvation/lack of oil change at correct intervals. I wouldn't personally run replacement rockers on that until it was reground. Not sure if that cam is chilled iron or not. I have seen this a lot on G5 cams and not K model cams (K model cams are usually pitted badly).

Of course there is the old adage of how many miles it will do after restoration or lack of them but I am not from that school of thought. I would want it to be right.

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[Craizeehair]

Guess who got an ultrasonic cleaner and couldn’t wait to mess about with it!

I set about cleaning a few bits and bobs and had the bright idea of cleaning the rocker cover, it cleaned it ok but it has changed the colour dramatically. My question tho those who know is, if a this still ok to use… The journals are in the same condition but no longer bright, will this matter, will the integrity of the part be compromised? I do have a spare which has a ok but not quite as good as this one.

[Nurse Julie]

Guess who got an ultrasonic cleaner and couldn’t wait to mess about with it!

I set about cleaning a few bits and bobs and had the bright idea of cleaning the rocker cover, it cleaned it ok but it has changed the colour dramatically. My question tho those who know is, if a this still ok to use… The journals are in the same condition but no longer bright, will this matter, will the integrity of the part be compromised? I do have a spare which has a ok but not quite as good as this one.

Any fluid / additive that is mildly caustic based, causes alloy to go black. It can also wear alloy away and make it porus, depending on how long it was immersed for.

[McCabe-Thiele (Ted)]

As Julie said it looks like something caustic has discoloured the alluminium - much like a dishwasher does if you put an alluminium sauspan in by mistake. (Guilty)

If its light staining as opposed to surface corrosion it might not be an issue.

I use the Allendale Cleaning Solution for Alluminium parts like carbs etc.

[Bryanj]

Should be ok to use, just not pretty

[Craizeehair]

Thanks all, lesson learned.

[Laverda Dave]

As Ted just advised, use Allendale products in the ultrasonic. They do a wide range of products depending what you are cleaning.
Don't put aluminium pans in the dishwasher but they are great for cleaning the wiring loom, just make sure the coast is clear!

[Craizeehair]

Funnily enough, I was just looking at the Allendale site, I should have known better but who doesn’t love a new toy! I guess I know the answer but is there any way to get this back or is it a case of damage done and move on?

[Craizeehair]

Well that’s a fight I wasn’t expecting… If I had done my homework and read a couple of threads here I would have known better!

I can’t get this centre stand pin to budge and no surprise there it seems. I’m not sure if it’s going to be worth the aggravation just to clean it up and paint it, I’m sure I could do that in situ. Are there any real reasons that I should, is the whole thing likely collapse on me if I dont?

[Seabeowner]

Presumably the pin is rotating with the stand, so moving in the frame fixings.
Could try the usual cycle of easing oils and heat. Put something between any hammering device and the pin as they are easily distorted.
I had one on a 500 and I had to thread a hacksaw blade through it and saw through it to free it.

[Johnny4428]

I would be tempted to weld a blob on to the pin where the gap in the bracket is tighten that bolt up and then try and turn by folding stand, or even welding end of pin to bracket.