You'll be hard pressed to beat this price for stock valves:http://www.ebay.com/itm/Honda-CD175-CA175-CL175-CB175-SL175-CB200-Valve-in-ex-/230583099958?pt=Motorcycles_Parts_Accessories&hash=item35afd2e236&vxp=mtr
I'm not sure why you think that stock sucks. SUre they drop a head from time to time but to be fair, we ran three different motors for years on stock (lightened) valves and only failure we had was when my rider tried to catch a CB350 up the main straight at Road America and severely over revved it. 13,000 will do that to a valve eventually. I have looked at Kibblewhite valves and agree that they are a nice insurance, but they also have a life and need to be replaced from time to time.For a street motor I would use whatever valves came out of the motor - clean them up and you're good for another decade or so. For a race motor, I'd still have a hard time justifying the investment Titanium valves are good with a 180 degree crank, full re-design of the cam tensioning arrangement and suitable seats and guides, but my pockets are not that deep.I used to get valves machined up from stainless blanks to my own designs for a CB77 but the cams I used beat them to death so I started to use stock valves and with a slight head re-design they made more torque and more power than the old SS oversized valves. Now what was the problem you were alluding to?