I don´t want expend too much time with my NSR, but I could not resist try to model the engine top end with Solidworks , could be profesional deformation but now I´m sketching and modeling it on 3d before port and polish.
Cylinder it´almost finished.
Measuring with a 3d taster at work with a machining center.
Also I bought the spare parts I need, gaskets, exhast valve cables (only "B" cable, "A" cable I´ll must buy via internet , Honda deadler here in Valencia couldn´t get me).
And I bought the RC Valve axle that I broke when I dismounted the valve flaps from the cylinder.