Montesa Is Running

[cappra]

Tom,
I would not run it in the clutch.  A 10/30wt multi grade motor oil would be better.
You can also use ATF or modern two stroke transmission oil.
You can try it, your not going to hurt anything, it might make the clutch
hard to disengage.

[runutz698]

And for the gear box it would be ok??

Cheers
Tom

[holeshot buddy]

personly i wouldnt run the 80 in gearbox
i would just run a good quality 2 stroke gearbox oil
and atf in the clutch as jared said would be fine

[cappra]

Use the Penzoil GL-4 in the gearbox.  Remember the bronze bushings..

[mike1948]

I've been running 10w 30 in the clutch, and plain 40w engine oil in the gearbox, as originally recommended in the VA360 specs( haven't found any for the VB ). 
Jared you recommend an 80 weight gear oil instead.  Am I at risk of doing damage, was the orig spec oil found to be inadequate for protection?

Mike

[cappra]

The gearbox oil originally speced by Montesa was a 90wt gear oil.
the smelly stuff they use in car rear ends.  40wt is ok.  I just feel more
at ease using a quality GL-4 rated 80/90wt. gear oil.  This is the oil that
is used in automotive manual transmissions.

[runutz698]

I found some GL-4, spoke to the old man about this, the newer oils kill hemp seal and also brass bushes. He is heavily into vintage cars and only uses older oils for this reason.

Cheers
NutZ