Yes I know, but allot of the guys on different forums say 7 and 11 work good. Ted from engbldr.com says quote from one for his replies
"I have always felt that .008" and .012" was a shade on the loose side. These engines do run noisy, after all the design is mechanical.
By listening closely, one will realize the click sound is at 1/4 of engine rotation, a mechanic's stethescope has demonstrated to me that it is the exhaust side that we hear.
The stock cam profile will accept .008" and .010" and this can help to ease the sound. But if the adjuster screw ends are worn, moving them exposes a different area, and the noise may actually increase at a closer setting.
Plus if worn, it is very easy to get a false reading since the feeler will read the widest point rather than the closest.
Trying to use "drag" as a guideline is very hard to do, these engines only have 60# seat tension in the spring, so a snug drag may actually be zero lash unless one has very good hands.
If the camshaft profile is other than stock, the lash setting may well be different than factory settings due to the lobe shape.
We suggest .007" intake and .009" exhaust on all of our designs for quietest operation, and we have even set the stock cam at that reading with no harm."
Thread link:
http://www.4x4wire.com/forums/showflat.php?Cat=&Number=899759&page=3&view=collapsed&sb=5&o=14&fpart=1