Puch horsepower differences

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This is taken from a PDF file of a Puch service bulletin concerning horsepower upgrades on Puch models


Conversion from 1.5hp to 2hp

Change:

Intake manifold from 12mm to 14mm (part # 321 315 630 1)

Head gasket from 1.5 mm to none

Air filter -- remove large pipe including orifice and plug and replace it with small pipe (part # 349 115 073 1)

Main Jet from 50 to 56 (part # 362 115 009 1/56)

Throttle slide from #51 to #24 (part # 349 115 015 1/24)

Needle jet from 2.12 A to 2.22 (part # 349 115 008 1/22)

Exhaust pipe drill two holes 10mm in diameter (see links below for details)


Original PUCH Service Bulletin, 4/12/83

Derestricting a Puch Maxi exhaust


Luck of the draw got You stuck with a 1 HP bike? Don't fret! You'll also need a new cylinder, and some sprockets if it's a 1 HP ZA50 (they have taller internal gearing).

Puch 1hp restrictions