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My CB550 K3 Restore Project

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heli_madken:
Just working on cleaning/checking pistons and fitting new rings.

Number 4 has suffered at the hands of a mechanic who thought a bricklayers scutch hammer was the best tool to remove carbon -
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Some nasty score marks as you can see. It looks like the cylinder has been suffering some light pre-ignition with the pitting you can see, I guess thats why somebody attempted a de-coke. The rest of the piston checks out ok so I am probably going to re-use, what do you think?

It does prove to me as I suspected that somebody has worked on this engine before 

heli_madken:
 :)

Are you trying to imply that I am some mad crazy person that polishes everything -
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Charlie J:

--- Quote from: heli_madken on September 04, 2020, 02:31:47 PM ---Thanks a lot, It is VHT Cast Aluminium paint - https://www.frost.co.uk/vht-cast-aluminium-engine-enamel-high-temperature-paint-312ml/ It probably isnt the same as the original Honda finish but I like the colour and finish and it is easy to apply. Used it before and it is holding up really well on my GL1000, Ken

--- End quote ---

Paint looks really good. Can I ask whether you had to use a primer?

Thanks
Charlie

heli_madken:
No Charlie, VHT do sell a primer but I have never used one, just made sure everything was very clean, Thanks!

heli_madken:
Had an enjoyable day putting the cases back together.

I have replaced all the oil seals. Most difficult one was the alternator only because I had a screw up with Fedex ordering an M16/1.5 x 50mm bolt (I am sorry COVID is no longer an excuse for a package to take days when you have paid next day delivery, TAKE ON MORE STAFF!! and stop using the situation to increase your profits) sorry rant over. Once I got the bolt my impact wrench made very short work of the rotor.

Also replaced main shaft bearings which where surprisingly easy to do, it helped a lot putting the shaft in the freezer overnight.

I nearly didnt replace the primary rubber's after forgetting to order them but I am glad I did now, the originals are rock hard compared to the new ones -
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Everything placed in position, all gears select nicely and everything runs smooth, I used a smear of Threebond to seal the cases -
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Cases went back together easy and everything torqued up nicely followed by driving in the main shaft -
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The difference in the tightness of the primary drive chain is staggering, when I compared new to old I was a little perturbed that there wasn't that much difference but wow once in place it really is much tighter.

I plan on getting the engine back in the frame and built up completely over the next few days.

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