SOHC.co.uk Forums > CB750
750 K2 Strip & Rebuild - help please
AshimotoK0:
--- Quote from: Oddjob on March 26, 2022, 03:27:15 PM ---Your wrong Simon, that impressed me. Never heard of anyone doing that before, great info and might explain those unexplained "why has my engine seized" questions when there is no rational explanation, a big clump of that stuff coming loose would ruin most engines, who knows what it contains.
--- End quote ---
Impressed me too .. I had always wondered about those sealing balls but thought removal would be a nightmare and since I never heard of anyone removing them and finding what lies underneath them I kind of (probably wrongly) dismissed the idea. I have a decent TIG welder and a scrap crank so going to try it out sometime ... although my scrap crank is a very early die-cast and I seem to remember that that they may be sealed differently. How easy was it to chisel the balls out Simon, that's assuming you were there when he did it. I wonder what Vic World does or possibly sandcast cranks don't have those balls ?
taysidedragon:
Yes, very thorough. He obviously knows his stuff.
Old Triumphs have a designed sludge trap in the crank which has to be cleaned out occasionally, along with the oilways. It can be difficult to access but not as difficult as removing those ball bearings.
AshimotoK0:
I found this post on the USA site regarding the sealing balls
http://forums.sohc4.net/index.php/topic,146287.msg1664725.html#msg1664725
Trigger:
You should always remove the balls when cleaning a crank. The later 750 crank has grub screws with are easier to remove ;)
Oddjob:
I have 2 scrap cranks I was going to give to the scrapman but I might have a go at getting those ball bearings out for a laugh.
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