Hello everyone, Kumaka, on the adjustments, if they are a very good approximation, however the 426 manual is in the net, Googlealo. Finally as a recommendation there are many people who sand or spend the calibrated pills of those engines manually ... error by not being perfectly flat ... produce the cessation or interruption of the valve turn in the guide of it. This produces precisely that the valve, the seat and the valve guide are spent prematurely ... Buy the pills, hot cams are cheap and good (cemented steel), but as a recommendation use a micrometer to verify the height of the regulation tablet, despite having the thick Fillet is, be careful that the pill does not fall by taking it out and installing the other inside the engine, I use a powerful magnet ... Finally if the regulatory tablet in general approaches 1.20 mm means that there is wear, it is recommended to intervene the engine ..., in fact with the thickness of the pill you can get a fairly clear idea of the valve wear state. Good luck any questions write to us. Greetings to all.