Are Dell'orto - PHBH 4T the same beastie as PHBH 2T
Post Reply    Forum -> Not-So-Modern
Author Message
Member
1966- VBC, 1992 P200e
Joined: 24 Sep 2012
Posts: 27
Location: Melbourne, Australia
Mon May 03, 2021 9:58 pm quote
Having a problem sourcing a Dell'orto PHBH BS 30mm, seem to be only turning up with PHBH BS 30mm 4T

Q: Are these four stroke the same carb as a two stroke, only jetted differently - or - is there something 'special' going on in these four stroke carbs?


Zep66
Jet Eye Master
PX221 MHR, O tuned PX200, PX125 and some motorbikes
Joined: 14 Jun 2017
Posts: 2755
Location: London UK
Mon May 03, 2021 11:33 pm quote
They are the same carb body casting but have some different sized air passages. Atomiser and atomiser bushing need to be changed. 4T carbs can be drilled out and made into 2T but you'll need one to compare with.
Member
1966- VBC, 1992 P200e
Joined: 24 Sep 2012
Posts: 27
Location: Melbourne, Australia
Tue May 04, 2021 12:51 am quote
Jack221 wrote:
They are the same carb body casting but have some different sized air passages. Atomiser and atomiser bushing need to be changed. 4T carbs can be drilled out and made into 2T but you'll need one to compare with.
Ahh, ok, thanks.
  DoubleGood Vespa T-Shirts  
Post Reply    Forum -> Not-So-Modern
[ Time: 0.0351s ][ Queries: 23 (0.0133s) ][ Debug on ][ Thing Two ]