Modern Vespa : 2-port pistons versus 3-port pistons

2-port pistons versus 3-port pistons

OP danie UTC details Hooked '57 VN2, '70 180 Rally, '80 P150X, '80 P200E, '05 GT200 Joined: UTC Posts: 378 Location: George, South Africa
OP danie Hooked '57 VN2, '70 180 Rally, '80 P150X, '80 P200E, '05 GT200 Joined: UTC Posts: 378 Location: George, South Africa	UTC quote Why can't I use a 3-port piston in a 2-port cylinder? 3-Port pistons are much cheaper than 2-port pistons.

oopsclunkthud UTC details Banned 3:5 Joined: UTC Posts: 9061 Location: San Francisco
oopsclunkthud Banned 3:5 Joined: UTC Posts: 9061 Location: San Francisco	UTC quote nothing wrong with using a 3 port piston in a two port cylinder* * Assuming it's not a piston port enigne

orwell84 UTC details Ossessionato Joined: UTC Posts: 3767 Location: northern New York
orwell84 Ossessionato Joined: UTC Posts: 3767 Location: northern New York	UTC quote I have always wondered about that too. Does the Pinasco 177 have some kind of extra port in the piston? Is it any better than using a 3 port cylinder on a 2 port motor.

OP danie UTC details Hooked '57 VN2, '70 180 Rally, '80 P150X, '80 P200E, '05 GT200 Joined: UTC Posts: 378 Location: George, South Africa
OP danie Hooked '57 VN2, '70 180 Rally, '80 P150X, '80 P200E, '05 GT200 Joined: UTC Posts: 378 Location: George, South Africa	UTC quote oopsclunkthud wrote: nothing wrong with using a 3 port piston in a two port cylinder* * Assuming it's not a piston port enigne Thanks for the info, and no, I want to use the piston on a Sprint

sdjohn UTC details Johnny Two Tone '15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4 Joined: UTC Posts: 9028 Location: San Diego, CA
sdjohn Johnny Two Tone '15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4 Joined: UTC Posts: 9028 Location: San Diego, CA	UTC quote I'd take a hard look at the windows on the piston - they matter. that being said, you can always modify them if need be.

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