i can seem to get the manual to work nor can i find mine here...will be doing a oil change and over haul of necessities for this upcoming riding season...i am looking at using amsoil but i am not sure what to use for my 929...better to use 10w40 or 20w50? 20w50 says its better for air cooled motors...

 

I use only Honda HP4, Synthetic blend 10w 40

 

is that oil more prefered over some of the aftermarket oils available?

 

I heard synthetic will make the clutch slip if it's about 70% gone or something like that