SOHC.co.uk Forums > CB750

Oil feed to clutch cb750k

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Pauarc:
I just emailed Castrol about ma spec oil and they replied I don’t know if the info is any help

Johnny4428:
Interesting stuff there Paul.

K2-K6:
Interesting information in there pauarc.

Jaso Ma2 would appear to (going by convention) have a reduction zinc element to reduce the affect on post combustion exhaust gas treatment equipment, not helpful in these engines we talk about.

The point about Jaso labelled oils, is not the absolute std and the oils that are classified as such, but that perfectly good oils we could use are never going to be subjected to testing for that std as it's not necessarily their target market.

The point is made though, that this oil is a match for that previously used in these engines when contemporary. Making it realistic to use it currently without any particular concern.

Skoti:
Was horrified to discover the PO had cut grooves round the friction surface of the steel clutch pressure plates of my CB750F1.
But as the clutch had been previously working OK I just re-assembled it as is.

Seemed like a severe botch to me, and probably done to help prevent clutch drag perhaps?


Anyhow I'm not advocating this as a cure for clutch drag.
Be good to find out what the proper cure is tho...

 

 

Oddjob:
There is this mod to the 750 clutch, done in order to get more oil onto the friction plates etc in order to make the action smoother and thus gearchanges.

http://forums.sohc4.net/index.php/topic,7190.0.html

I've done this mod to a CB1300 and whilst the difference wasn't pronounced it was a bad change before but as they say "Every little helps"

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