so according to my service manual when changing the primary fluid you drain and fil with 38 fl. oz. of new fluid. I was going with the red line shockproof which only comes in qt size. my question is why? do I really have to purchase two quarts?

 

Not sure what bike you have. Mine is a 99 RK. My Clymer manual says 32 oz. I don't think I even use all of that, but close. You should fill it until it is even with the bottom of the clutch opening (derby cover) or to the bottom of the diaphragm spring.
they make a new funnel (dealer sells) that should make pouring in fluid easier. i plan on trying it next time I have to change fluid. I use the old derby cover gasket right now.
The newer bikes could require more fluid then mine does though.

 

No one Qt is fine. don't think you want to use shock proof in the pri maybe this.
http://www.redlineoil.com/product.aspx?pid=120&pcid=13

 

06 and down take 32oz they chandged with the 6 speed in 07. 07 and up take 38oz
So by two quarts and save whats left and next time you will only need to buy one
quart easy enough isnt it

 

Yeah.... thats the stuff I meant.... Im gonna go with the shockproof in the trany

 

Exactly. One quart will not do it.

 

All the big twins need 32 oz.and use an oil designed for primarys.Any questions talk to Co.s that deal with wet clutches.

 

That's not correct if his bike is an '07 or later. Page 164 in the manual says 38 ounces.

 

Correct!

 

38 oz.s. Right, the newer primary is larger. I've been useing Redline because shipping for the tranny fluid was one price and I purchased the primary fluid. Kind of think as long as the amount of fluid is correct the manufacturer does not really matter.