SOHC.co.uk Forums > CB750
Oil pressure issue / motor rebuild
MrDavo:
I eventually took it apart anyway, barrels well and truly stuck on, pistons and rods still in the bores. I stupidly popped a ring out, I had to weasel it back in with my fingernails, which took ages.
Entry, risking the garage roof again with a ratchet strap. Note Trigger's stand coming in handy. Also the Aldi work bench's compressed cardboard top has been replaced with some proper wood after an, er, accident.
First glimpse of a main bearing:
Strangely although all the mains are toast, shells and crank, the big ends are fine, so I don't need any rods, Ash, I may need a rotor and ring gear yet, though, that big bolt isn't for shifting.
Oh, the horror!
I should cable tie up the rods, so they don't flop around and ding the pistons.
Bryanj:
Those shells are toast, you should never be able to see the copper, and with that i suspect the crank is as well
royhall:
Plus 1 with Bryan, that crank is toast. That's what happens when the previous owner ignores the essential oil change regime. Crank can be repaired but probably easier and cheaper to find a replacement.
Trigger:
There is a big problem I see in the photos, apart from the crank and shells, why is it so clean inside ? Not a oil stain in sight.
royhall:
--- Quote from: Trigger on August 10, 2016, 08:21:15 AM ---There is a big problem I see in the photos, apart from the crank and shells, why is it so clean inside ? Not a oil stain in sight.
--- End quote ---
Your right that is incredibly clean. Pump failure do you think or maybe no restrictor jets fitted?
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