Gear Box oils

[oldyzman]

I use transoil expert syn motul, but also use ATF in my race bikes. Really no need to change it very often. Consider it runs for 30 thousand K's in the average car getting cut to pieces in a torque converter.

[pokey]

What does the book say?
Im willing to wager it says use 10-40 motor oil.
Thats what all early jap bike manuals say and is what i use.

ATF was around  years ago and so was gear oil. . sort of makes you wonder why the engineers didnt specify  those if they were suitable as its certainly not a price thing. Most oils will work on the cogs and a heavier weight will just drag more but with a wet clutch being soaked in the stuff, thats a different matter as the anti friction  additives and viscosity goes against what a clutch is suppose to do.


 consider the action of the clutch and how oil plays a vital part  in its action both engaged and disengaged and you will come up with an oil suitable for you.

[Doc]

yup, straight 15w-40 mineral oil does it for me, but then I'm probably old school as I still use the clutch (albeit with a little fanning sometimes) on all up and downshifts

[80-85 husky]

I rode a mates "moto Villa" and It needed the clutch lever pulled to gain certainty of shifts...without it, it would suddenly return to the previous gear with the obvious downfalls that entails.

[Lozza]

http://www.supercheapauto.com.au/online-store/products/Castrol-VMX-80-Gearbox-Differential-Oil-1-Litre.aspx?pid=1582#Recommendations

20% off today

[oldfart]

Even cheaper  when buying 4 litre pack

[pancho]

I don't believe one can go past A.T.F. It is perfect for clutches, minimum drag, gets in where it's needed, plus it is an extreme pressure lubricant for gears, When I was working on Johnson outboards 135 hp. the instruction was if the OMC oil was not available for the lower leg gear set in your location use A.T.F.
 Typical planetary gears in Car auto trans are small gears, small teeth and high tooth loading.
 pancho.

[sleepy]

http://www.supercheapauto.com.au/online-store/products/Castrol-VMX-80-Gearbox-Differential-Oil-1-Litre.aspx?pid=1582#Recommendations

20% off today

Not a good oil for a motorcycle gearbox with a wet clutch unless you want to turn it into an auto.
There is a Castrol gearoil at Supercheap that is better suited to 2 strokes.

http://www.supercheapauto.com.au/online-store/products/Castrol-MTX-2-Stroke-Gear-Oil-1-Litre.aspx?pid=4460&menuFrom=60604#Recommendations 

[Lozza]

http://www.supercheapauto.com.au/online-store/products/Castrol-VMX-80-Gearbox-Differential-Oil-1-Litre.aspx?pid=1582#Recommendations

20% off today

Not a good oil for a motorcycle gearbox with a wet clutch unless you want to turn it into an auto.
There is a Castrol gearoil at Supercheap that is better suited to 2 strokes.

http://www.supercheapauto.com.au/online-store/products/Castrol-MTX-2-Stroke-Gear-Oil-1-Litre.aspx?pid=4460&menuFrom=60604#Recommendations 

Castrol(and me) think differently.

http://www.castrol.com/en_au/australia/products/cars/manual-transmission-fluids/manual-vmx-80w.html

[evo550]

http://www.supercheapauto.com.au/online-store/products/Castrol-VMX-80-Gearbox-Differential-Oil-1-Litre.aspx?pid=1582#Recommendations

20% off today

Not a good oil for a motorcycle gearbox with a wet clutch unless you want to turn it into an auto.
There is a Castrol gearoil at Supercheap that is better suited to 2 strokes.

http://www.supercheapauto.com.au/online-store/products/Castrol-MTX-2-Stroke-Gear-Oil-1-Litre.aspx?pid=4460&menuFrom=60604#Recommendations 

Castrol(and me) think differently.

http://www.castrol.com/en_au/australia/products/cars/manual-transmission-fluids/manual-vmx-80w.html

"•It can be used as a low drag gearbox oil in 2-stroke motorcycles with separate gearboxes." Might mean a dry clutch Lozza.

[80-85 husky]

let him try it and report back

[LWC82PE]

I think it means separate gearbox as in not part of the engine lubrication like a four stroke. Oldfart says he uses it in all his bikes and has no problems so i think that says enough that it is fine for clutches.

[evo550]

I think it means separate gearbox as in not part of the engine lubrication like a four stroke. Oldfart says he uses it in all his bikes and has no problems so i think that says enough that it is fine for clutches.

What two stroke motorcycle has gearbox oil lubrication ?
Some 2 stroke roadies have dry clutches.

[LWC82PE]

I think it means separate gearbox as in not part of the engine lubrication like a four stroke. Oldfart says he uses it in all his bikes and has no problems so i think that says enough that it is fine for clutches.

What two stroke motorcycle has gearbox oil lubrication ?
Some 2 stroke roadies have dry clutches.

I think what i have written may have been misunderstood?
Not sure if your question is directly aimed at me? the answer is all 2strokes have gearbox oil lubrication so i am not sure what you are trying to say? I do not think that the Castrol info is suggesting it is ok only for 2 strokes with a dry clutch only.

I believe their 'separate' term is meaning for use as a gear oil in all 2 strokes. I do not think they are saying its no ok for clutches. The fact that they mention 2 stroke is suggesting it is not suitable as a 4T oil thats all. Thats how i read it anyway.

[Lozza]

http://www.supercheapauto.com.au/online-store/products/Castrol-VMX-80-Gearbox-Differential-Oil-1-Litre.aspx?pid=1582#Recommendations

20% off today

Not a good oil for a motorcycle gearbox with a wet clutch unless you want to turn it into an auto.
There is a Castrol gearoil at Supercheap that is better suited to 2 strokes.

http://www.supercheapauto.com.au/online-store/products/Castrol-MTX-2-Stroke-Gear-Oil-1-Litre.aspx?pid=4460&menuFrom=60604#Recommendations 

Castrol(and me) think differently.

http://www.castrol.com/en_au/australia/products/cars/manual-transmission-fluids/manual-vmx-80w.html

"•It can be used as a low drag gearbox oil in 2-stroke motorcycles with separate gearboxes." Might mean a dry clutch Lozza.

No 'separate gearbox' means the gearbox and crankcase don't share the same fluid.

let him try it and report back

I've only used vmx80 for 20yrs.

I think it means separate gearbox as in not part of the engine lubrication like a four stroke. Oldfart says he uses it in all his bikes and has no problems so i think that says enough that it is fine for clutches.

What two stroke motorcycle has gearbox oil lubrication ?
Some 2 stroke roadies have dry clutches.

The number of dry clutch 2 stroke road bikes are 3 RGV VJ22 with a kit dry clutch, NSR250 SE and the TZR 250 3XV SPR. I don't understand what you mean by 'gearbox oil lubrication' as not many gearboxes will run without lubrication.