Cylinder Head PINASCO VRH GP Developer Version for POLINI/D.R./PINASCO 177

for Vespa 125 VNA-TS/
50 VBA-Sprint/
X80-150/
E/
usso

63 mm
just inner calotte, w/o combustion chamber

TUNING RACE – for professionals

For race use only. Not admitted in the area of the German StVZO! Product description
At last! New heads for the 177cc from
PINASCO
. Thanks to their universal fit, the new parts from VRH fit all conventional 177cc cylinders. Both VRH head variations are both versatile and innovative. The
VRH PRO
has a central spark plug; combustion chamber and squish band have been newly calculated and optimised. The
VRH GP
is even more versatile and comes with two removable semi spherical caps. One of these (GP1) is made for street use, the other (GP2), was specially developed for racing use and promises more oomph through smaller squish band and higher compression.
Conclusion:
Whether country roads or race asphalt: the right head for all situations!

Aluminium /
63 mm / 57 mm stroke / central spark plug/ combustion chamber removable in part
Aluminium cylinder head, massive construction,
63.0mm, short thread, compression 11.5:1, squish band clearance 1.2mm, high quality casting

Pros can order a spherical cap molding blank for the VHR GP and modify and optimize to their specific motor’s needs.
OEM numbers (for comparisons):
25243715 (PINASCO)