Dome or deflector ?
Post Reply    Forum -> Not-So-Modern
Author Message
Hooked
'64 Motovespa 150S (177) , '76 V90 ( 133)
Joined: 27 Mar 2013
Posts: 488
Location: S.Salem, NY
Thu Jan 03, 2019 10:11 am quote
Rebore the stock VBB2 cylinder for an OS deflector piston or replace cylinder, head, and piston with new domed version ?
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and new to 2018, '66 Blue Badge Smallframe
Joined: 30 Nov 2011
Posts: 6557
Location: Victoria, Australia
Thu Jan 03, 2019 6:09 pm quote
The second one.
Hooked
'64 Motovespa 150S (177) , '76 V90 ( 133)
Joined: 27 Mar 2013
Posts: 488
Location: S.Salem, NY
Fri Jan 04, 2019 3:50 am quote
What I figured as they completely abandoned this configuration. Thanks.
Enthusiast
PX125E
Joined: 06 Oct 2018
Posts: 55
Location: Gravesend, Kent, UK
Fri Jan 04, 2019 8:19 am quote
Hello Moto.
The deflector Piston is of historical interest only.
The transfer ports are a completely different angle in the barrels and domed pistons have many advantages over their ancestors.
Land of 10,000 Scoots Rally   Vespa Wasp Pin Badges   AF1 Racing Vespa Austin
Post Reply    Forum -> Not-So-Modern
[ Time: 0.1576s ][ Queries: 23 (0.0297s) ][ Debug on ]