better performance questions

max /
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I have a 1978 puch maxi.

I bought it 5 years ago.

It ran okay, went about 25mph tops, which really ticked me off cuz it was so slow.

It eventually wouldn't start.

Now i took it apart and am researching on how to make it run faster. I am having trouble figuring out what kind of cylinder kit would fit my moped, and what kind of carburetor i would need to go along with the cylinder kit. I'm trying to make my moped run as fast as possible and the biggest cylinder kit i found was a Puch 80cc metrakit large port cylinder kit. I have no idea if it will work for my moped, what carburetor i would need with it, what modification would need to be done.

If this cylinder kit wouldn't work, then what kind of cylinder kit (preferably largest possible) would work for my puch? can anyone help me understand the basics or limits a puch maxi has like if for example I did install the 80cc cylinder kit, then would other parts not be able to handle it?

If anyone knows, whats the fastest you can get a 1978 puch maxi to ride, and I'm not talking about insane modifications like changing the whole engine.. just medium-size adjustments such as cylinder kits, carburetors, air filters, etc.

Thanx for your time.

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