Not approved, strictly prohibited on the road, reserved for competition and closed circuits!
The famous PARMAKIT BIG BORE is the direct competitor of the MALOSSI MHR BIG BORE, the POLINI BIG EVOLUTION, THE TOP PERFORMANCES TPR 50mm.... Large diagrams, part stud cylinder head, single-segment piston, huge bar exhaust... We are on a very powerful kit, to be installed with a well-tuned exhaust, an ultra-reinforced crankshaft with original size 80mm connecting rod and original crankshaft stroke 39.2mm, carburetion in 30 to 34mm, variable ignition...
For installation on a long 85mm connecting rod, installation of a 5mm shim is required. Mandatory casing milling of the casing for installation!
As an option we offer you a stage 1 preparation, this preparation is a modification of the channels and the exhaust port by increasing the diagrams and improving the conduit, it increases the performance of the cylinder. An improvement to the piston and skirt bottoms is also included in this modification. Allow a little extra time for this preparation!
Mounts on liquid PIAGGIO 50cc 2-stroke engine:
APRILIA SR
ARPILIA SR R
DERBI GP1
DERBI GPI OPEN
GILERA DNA
GILERA RUNNER SP before 2005
GILERA RUNNER SP after 2006
GILERA RUNNER
PIAGGIO NRG EXTREME
PIAGGIO NRG MC2 before 1997
PIAGGIO NRG MC2 after 1998
PIAGGIO NRG
PIAGGIO NRG MC3 DD
PIAGGIO NTT
PIAGGIO NRG Power DD
PIAGGIO QUARTZ
PIAGGIO ZIP SP after 2001
PIAGGIO ZIP SP before 2000
And other models ...
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