It would be interesting to know how many of these 803cc engines actually need valves adjusted at 12kkm or 24kkm. It is a "check and adjust if necessary" item and if there is something that is burning up or carbon-coating or wearing those valves so that they really need adjustment every 12kkm, you got a bigger problem. The valve check is a good diagnostic, if the valves stay in spec, the whole head is very likely in good condition in many aspects. Anyway, where I want to get with this, though $1000 is ridiculous even for a full adjustment on the 2-valve engine, it is outright absurd for a valve check. Yes you have to remove the tank and stuff to get to the top cylinder and whatnot, but how many hours and at what rate can it be? I would like to see the reasoning behind someone telling that it will take 10 hours and the rate is $100/hour.