So there has been a bit of debate over what type of fluid to use in the primary cover. Several people have claimed that Type F trans fluid is the way to go. Well, I'm here to say that Type F blows in the primary. I was using Type F before and bad clutch problems and didn't think anything of it. After my clutch rebuild I used Castrol Import Multi-Vehicle and my clutch worked great, seldom slipped and overall worked just fine. Well, I decided to pull the primary cover and do a bead of silicone to try and get my leaks under control and filled it back up with Advance Auto Parts Type F. I didn't even get out of my parking lot before I noticed the clutch slipping like freaking crazy. It was bad, REALLY bad. So bad that I basically came straight back home, drained the fluid, put about 10 ounces of lacquer thinner in the primary and sloshed that around for a bit, drained that, went for another ride with the primary empty and the clutch is still slipping.
DO NOT USE TYPE F IN YOUR PRIMARY!!!
IT WILL CAUSE YOUR CLUTCH TO SLIP!!!
Scottie J
Found my '08 AVL in December 2010. Bought it from the lawyer liquidating an out-of-business dealer's stock (he knew Nothing). Zero miles, seemingly perfect, sat in a back room for two years, gas drained, no battery. I knew nothing about REs then. Learned everything here & other websites & various manuals. Just by luck it was an AVL, not a UCE.
I drained everything when it arrived & put a quart of Type F in the primary based on what I read here. All went perfect, no clutch slippage ever & I drained everything again at 300 & again at 600 with Type F in the primary (I know. Overkill. Oil is cheap). Bike now at 950.
No clutch slippage ever. Clutch is smooth as pig shit all the time.
Maybe I don't beat it hard enough.
As soon as the bike's back running again & the new TM-32's dialed in & I can get it good and hot again & I'm over a 1,000 I'm gonna drain everything again & see how the Type F does over the next 2 or 3,000 miles.