hi all i have a sherco 2013 sherco st 300 and have just changed my oil using 10w40 i was just wondering what engine / gear oil you use in your bikes, i have heard some talk of using atf and it being better than the standard gear oil that is recommended, has  any body done this and found any notable changes or differences cheers all 

I run ATF (dexron II) in my gasgas and it works well 

TRS (sort of) specs ATF. So does Vertigo. Lots of people have used it in the GG over the years, although I prefer a heavy gear oil in mine... makes it shift a little less like a lorry. I'm pretty sure Sherco specs a 75W gear oil, so you might just want to stick with that. But ATF is used in a lot of trials bikes.

For the last eighteen months I have been using ATF in my Sherco ST 125.  However the clutch became increasingly on/off.  After doing the Beta clutch fix etc I decided to go back to using the much more expensive Putolin GP 10.  It is now much nicer, more slippable and controllable.

thanks for all the replies guys i'm definitely going to stick with the normal oil  

 

ATF lets the clutch hit sooner, which the guys riding the big stuff like. Most motor oil gives you a larger slip zone.

If you use 10w40 I will recommend you make sure it's motorcycle oil as most standard 10w40 car oil isn't designed for use with clutch and gearboxes.