Transmission oil

Hmm - I had exactly the same thoughts but there have been quite a few posts where alternative oils have caused clutch issues. My conclusion is that I'm currently happy with the clutch action and if it gets messed up with an alternative oil then it could be one hell of a messy task to get it sorted so I will continue to use the recommended oil but change it on a more regular basis IMHO.
 
Hmm - I had exactly the same thoughts but there have been quite a few posts where alternative oils have caused clutch issues. My conclusion is that I'm currently happy with the clutch action and if it gets messed up with an alternative oil then it could be one hell of a messy task to get it sorted so I will continue to use the recommended oil but change it on a more regular basis IMHO.

I wonder if folk inadvertently used oil not intended for wet clutches?
 
Richard 07 successfully uses Motul full synth in both. Based on his recommendation, I cowardly went with Motul full synth engine and blend for the tranny. Ah....not guts no glory. Had a nice silvery sheen when last changed. :confused:
 
Richard 07 successfully uses Motul full synth in both. Based on his recommendation, I cowardly went with Motul full synth engine and blend for the tranny. Ah....not guts no glory. Had a nice silvery sheen when last changed. :confused:

Yup. Every one we know around here with a 961 have had great success.
 
Richard, which one?

Is it the Motul 7100 4T range?

Which weight?
I had Motul 4T 7100 10w40 MA2 in my old engine.
Today I have Belray transmission... Both red color which makes it easy to distinguish from the engine oil, if you have any leaks.
With both of them I never had clutch issues!
 
Do you use this one Raphi?
I bought some to try but haven’t put it in yet...

Transmission oil
 
Maybe this one. I didn’t put it myself, it was Ollie. But if there is no other Belray transmission, it must be this one.
 
The 961 is strange in many ways though (as we all know), one such strangeness is that the gear oil is shared with the clutch and primary.

HD Sportsters are the same, and they allegedly have the same / similar gearbox.

The Belray I’ve bought is designed for HD Sportsters.
 
The 961 is strange in many ways though (as we all know), one such strangeness is that the gear oil is shared with the clutch and primary.

HD Sportsters are the same, and they allegedly have the same / similar gearbox.

The Belray I’ve bought is designed for HD Sportsters.
From memory, my understanding is the 961 tranny is very much like or the same as the Sportster. I may go that route. Don't you use the same oil for the T140 in the engine and tranny, FE?
 
The T140 breaths through the primary, so engine and primary case oil should be the same. I use the Bel-Ray 10W50 V-twin syn that came out top in Comnoz’ oil testing in the T140 as it is compatible with wet clutches. I intend also to use it in the 920 motor I’m building for my ‘74 and may well try it in the 961 too.

I am running Redline lightweight shockproof transmission oil in the T140 gearbox at the moment. But with that oil, the shifting was improved with the addition of Molyslip.

I will try the Belray V Twin gear oil in the T140 too, I can’t see why it shouldn’t be good in that. But I won’t know until I try it I guess.

I like to standardise such things in my shed as much as possible, it makes life easier !
 
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