Join Date: Feb 2017
Location: St. Louis, Missouri
YES, I did on both my '81 Honda CB750K and my '00 ZRX1100. Right after I bought them new. And yes, I realize that was 19 and 38 years ago--and I still have the bikes.
The 750 uses shim-over-bucket valve actuation, and I told them that the valve tools were a condition of sale for me(along with the factory service manual). The specs for both intakes and exhausts are .002"-.005". As I remember, out of the 16 valves 9 were within spec, but on the tight side. 7 were right at the tight limit. I was able to swap shims between valves to get 4 in spec, and had to purchase 3 shims to get all the valves to .003"-.005". Yep, it was under warranty but I told the service manager at the time of sale that unless something breaks or prematurely wears out under warranty, you'll never see this bike in your shop.
My ZRX1100 Uses sliding rockers arms to uncover shims located in the top of the valve spring retainers. shims. Specs are .005"-.007" intake, .007"-.009 exhaust. 9 were in spec, 7 were way too tight at .003".
Swapped some shims, bought 4, and got them all in dead center of spec. The bike ran great before with no drivability or noise issues, but was smoother and stronger after the adjustment.
Yes, these 2 are old bikes, but I still enjoy them and still run and look like new--when the carbs(what are those?) want to pay the game. But a key thing whether carbureted or injected is to to a cafrb or throttle body sync after a valve adjustment. Valve ajustment directly affects engine vacuum, and a sync ir really nothing more than equalizing vacuum on the engine side of the throttle plate. You can equalize the readings, but the idle and low-speed power outputs wont be the same between cylinders.