After much more hours that I planned (I do not want to expend too much time on the NSR) the cylinder it´s already modeled in 3D with Solidworks.
Some parts seems like if they challenging me to do them on 3d, and the top end of the engine from my NSR it´s one of these parts. I will model the top end of the engine while I´m working on the little two stroke Honda only like a "personal challenge"....
...with a lot of work ahead...
...but results make worth it (being a freak of CAD, I can understand others do not think the same).
Here I post some photos of the sketching and measurement process.
I try always be the most accurate possible to the parts dimensions but on casting parts it´s a hard work that needs a lot of measurements and sketches.
Because that I used a machining center of my work to made some measurements.
Now the cylinder it´s done and only rest easier parts of the top end like the head, piston or RC valve parts. I think soon I´ll have all finished.
Always I upload my models to my profiles at 3dVia and Grabcad. If you are a CAD freak like me you can download it HERE on 3dVia or HERE in Grabcad. I hope can be useful for someone.