Just had mine done at 17000 mi. spec is intake .0059 to.0079 in. intake, .0087 to .0106 in. exhaust
from #1 to #4 as sitting on the bike left to right
Exhaust .009 .009, .009 .009, .0095 .0095, .010 .009
Intake .0075 .0079, .0069 .0069, .0075 .006, .007 .006
no adjustment needed, except the turds caused a valve cover leak, which they "fixed" with a new gasket and another day of not riding and it still leaks! dumb turds ! guess I'll just have to do it myself if I want it right (thought I would save some time letting the dealer do it - at least they did not charge me for the 4 hours and gasket for the replacement) but anyway when I fix the leak myself I will wait till around 24000 mi. to recheck the adjustment, Shim under bucket valve trains only tighten up the clearance as they wear ( vale seat ) so it should be right at or ever so slightly under the service limit on the exhaust, intake should go to around 30K mi., but the exhaust will wear faster due to the elevated temps they run at. How do I know this? 40 years of wrenching, certified master mechanic, class A heavy duty mechanic, owned my own shop, have rebuilt hundreds of engines - gas, deisel, propane, fuel, etc. The danger of letting a valve clearance get too tight is the combustion gasses will squirt past a tight valve @ zero clearance and it will burn the valve and seat - too loose and it will clatter, make noise, loose power, and accelerate cam wear.
Obsevations = well desighed valve train / head, liquid cooling rocks! (used to own a CBX, and with 24 valves it needed adjustment every 7000 mi. - I blame air cooling, but was quicker to do with the shims on top of the buckets - no never spit a shim, even at 14000 rpm) last Kaw I had, 74 Z1, did spit shims, (shim over bucket),but had a radical cam and I abused the crap outta it. Bottom line is I give the ZX-14 upper end a B+ - it would have been an A but I do not particularly like the automatic cam chain adjuster - it sounds like a good idea, but too many rattle on startup - I would rather manualy adjust the chain. Other than the dealer induced valve cover leak the only trouble I have had with my '06 is a hole in my wallet from the tires this thing eats - but that is the price of formula 1 performance @ middle class income. What would a 190 mph, 9 sec. 37 mpg car cost ? 120K, 200K ? I rest my case.