Dome or deflector ?
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Addicted
'64 Motovespa 150S (177) , '76 V90 ( 133)
Joined: 27 Mar 2013
Posts: 515
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: 6677
Location: Victoria, Australia
Thu Jan 03, 2019 6:09 pm quote
The second one.
Addicted
'64 Motovespa 150S (177) , '76 V90 ( 133)
Joined: 27 Mar 2013
Posts: 515
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: 58
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.
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