I have a very good run with ELF- Total products and the local distributor takes care of me so I put ELF gearbox oil for motorcycles in it.
http://www.totaloil.com.au/automotive-lubricants/products-motorcycles/others/moto-gear-oil-10w40.htmlShifts smooth and no issues so far. Don't think there will be any.
Also at the price I get the products I'm not shy of changing it a bit more often if needed.
A lot of oils are overrated and definitively overpriced (motorex, motul...) I'm not saying they are bad but surely not double the quality than an other good brand to justify the double or higher price tag.
I ran my Husky FE501 on the Elf full synthetic and at the valve check interval of 120Hrs the engine looked brand new inside with no signs of wear.
The oil always came out clean and no abnormal wear on clutch or anything. I could buy a 20 L ELF full synthetic for the price of 2x 4L packs of Motorex...