Hello i am new here and my english is quite bad Also i have Aprilia sr50 with morini engine and i would like to tune it a bit. And i was thinking which cilinder i should use , i need cilinder with very good performance and my choises are:
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What year model is your SR 50? I thought that they came with Minarelli engines before they switched to the Morini Di-Tech engine.
If you have the Di-Tech engine, there's a cast iron Malossi kit that comes with the ECU and such.
I don't really mess around much with the Morini engine, wether carbureted or fuel injected, so I can't speak for the cylinders that you're asking about. I'm sure someone on here can though.
In Morini engine Bi-Metall would be the strongest one.. But of course U must buy good exhaust like TJT B or RS 70. U don't hv too much exhaust for F.Morini..