SOHC.co.uk Forums > CB750
Oil pressure issue / motor rebuild
hairygit:
--- Quote from: MrDavo on July 27, 2016, 06:42:13 PM ---Thanks, that just what I wanted to hear, it means I don't have to dismantle the gearbox, clutch, selectors, sprocket etc unless I need to.
--- End quote ---
That could prove a false economy. Personally I would totally strip the cases, and check all the oilways are flushed through and blown through with compressed air, seeing as you found metallic filings and nasties in the oil you drained. Think hard about it, do you want the possibility of having to do it all again and more for the sake of not completely stripping it now?
Trigger:
When you get that far, you may as well do the chains and look at the chain tensioners, rebuild the oil pump and so on.
AshimotoK0:
They are money pits to rebuild properly agreed. It's an F1 crank I have BTW not F2. One way of getting it to you safely would be to ask my mate as he goes on Sunday, at least twice a month, buying his mobile phone parts from a wholesaler in Manchester. You are always welcome here though. As I said, I also have a really nice early gearbox inc primary drive. Also a large box of gears but of unknown condition.
MrDavo:
I'll see where I'm at when I've got it in bits, I take the point that it all wants to come out for a good clean. From experience I'm very aware of 'mission creep', I don't want to get carried away if I can help it.
From the external condition, and the lack of mechanical noise (other than the death rattle when hot!), I think the motor had been rebuilt when the bike was restored, so I'm hoping that most of it will be good. I checked the oil pump out at the weekend, it all looked OK. I could do with fixing the wet sumping though, Trigger you said on the other oil pressure thread that you do the stopper kit yes?
Another 'while I'm in there' job will be to fit the heavy steel 'case protector' around the drive sporcket, which is absent - anyone got one?
@ Ash, your mate might be a good way to go, but I need to see what rod(s) I'll need first, in the hope that you have one (or more) the right grade to make a matching set. I'll fit new shells and mains after miking all the journals up, that doesn't look to be a cheap undertaking.
Any recommendations on gasket sets? some don't have all the O rings, yamiya do one at great cost, but I'm sure good quality.
Trigger:
--- Quote from: MrDavo on July 28, 2016, 06:38:27 PM ---I'll see where I'm at when I've got it in bits, I take the point that it all wants to come out for a good clean. From experience I'm very aware of 'mission creep', I don't want to get carried away if I can help it.
From the external condition, and the lack of mechanical noise (other than the death rattle when hot!), I think the motor had been rebuilt when the bike was restored, so I'm hoping that most of it will be good. I checked the oil pump out at the weekend, it all looked OK. I could do with fixing the wet sumping though, Trigger you said on the other oil pressure thread that you do the stopper kit yes?
Another 'while I'm in there' job will be to fit the heavy steel 'case protector' around the drive sporcket, which is absent - anyone got one?
@ Ash, your mate might be a good way to go, but I need to see what rod(s) I'll need first, in the hope that you have one (or more) the right grade to make a matching set. I'll fit new shells and mains after miking all the journals up, that doesn't look to be a cheap undertaking.
Any recommendations on gasket sets? some don't have all the O rings, yamiya do one at great cost, but I'm sure good quality.
--- End quote ---
yes, I do the stopper kit and have stock. PM me with your requirements
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