Is Motul Gear 300 75W-90 synthetic acceptable ‘01 R11RT

[Miguel!]

I searched and didn’t see anyone using it in the gear box or final drive. I got a bottle for free. 

Full synthetic API GL-4/GL-5 

Specs

 

Thx. I just don’t know much about oils.
Cheers Miguel

[dirtrider]

13 minutes ago, Miguel! said:

I searched and didn’t see anyone using it in the gear box or final drive. I got a bottle for free. 

Full synthetic API GL-4/GL-5 

Specs

 

Thx. I just don’t know much about oils.
Cheers Miguel

Afternoon Miguel

 

Well, if it actually meets the stated API GL-5 rating then it should work OK.  (see if it has an actual  API  GL-5 rating on the container)

 

It wouldn't be my first or even 2nd choice to use in an older BMW 1100RT but that based mainly on a seepage/leakage concern. The modern full synthetic gear oil's don't have a lot of seal conditioner in them  (especially racing type gear oils) so tend to seep or leak past the old seals easier).  

 

The final drive pinion seal is already a weak spot in the old 1100 BMW motorcycles so you might end up with more pinion seal leakage than you would like. 

[Miguel!]

Thanks DR. That was the type of informed info I was looking for.

 

I REALLY like the flexible spout on the bottle so want to repurpose the bottle. I have no other need for 75W90 gear oil so I'll just pour it into the oil recycling jug and use what I'd been using: Spectro 4 80W90 mineral oil. But I'll put it into the Motul bottle to get it into the tricky transmission fill hole. 

 

I wish more manufacturers would provide flex spouts like this. These are reused bottles that I saved when servicing my Vespa. (I use the 10-40 for my small tractor engine and rear-end oil.) The flex spout allows me to reach the rear-end fill hole easily on the tractor. Also the diameter of the spout is relatively small which works perfectly, especially when filling small gearbox oil fill-hole, such as on the R1100RT. The Spectro 4 20W50 is the engine oil originally spec'ed for the R1100RT, BTW. I find it on Amazon for ~$30/gallon delivered. I found my bike was smoother and acoustically quieter once I started using it so now that's all I use. It's also cheaper than synthetic oils. 

 

Miguel