killingsnake wrote: If you don't going to fit another mean to start your engine as written before, I advise that you just use the standard head. Its possible your piston will reach your cilinder head, so you have to place 2 bottem cilinder gaskets, i mean the "paper" gasket you place between your carter and cilinder.
But placing extra paper (bottom-)gaskets will change the timing of the cylinder, so I would suggest, that if you tend to use the original head, and the piston hits the cilinderhead, use extra aluminium top-gaskets (dia 47,6mm offcourse). The squish and the compression-ratio will change, but I guess this has less negative effect than changing the cylinder-timing.
killingsnake wrote:The malossi kit is offcourse way better then the standard carb. The standard carb is, compared to most carbs on the market today way to unreliable. Normally a 17,5 mm carb would do, but then you would have to adjust the air box on the black rear of the camino. Because its so big (21mm is actually quite big for such a small cilinder) you will need to adjust the nozzles carefully. If you use the complete set (with extra red filter you get in the complete set) the nozzle delivered with it will come very close...
I think (reading the theory of Gordon Jennings) that for a 65cc (standard) cylinder a 17,5 mm carb will do, but for a 70cc Athena a 19 to 20mm will do. A 21mm will not give you much more power than a 20mm, but the 21mm comes with the carb. kit, so that one is cheaply
In case of using a HPI ignition or similar (instead of an original one) the 21 carb does give more power, because the RPM of the engine will be higher.
You don't have to strengthen the frame, but strengthening the (engine-)bridge (= the 'frame' on which you mount the engine) is a good idea (just like Killingsnake mentioned).
When I fix the Piaggio head, I will place it on this site. But don't wait for it, because it can take a little while
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