Vespa Crankcases PX 125/150 or Sprint?
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Vespa 152l2
Joined: 04 Dec 2018
Posts: 15
Location: location
Mon Nov 11, 2019 8:31 am quote
It anyone able to quote what piaggo part no 991030 is?

Looks at some crankcases stated as PX, but not too sure as the crank bearing does not have the lip to retain the bearing making me think it's a Sprint Veloce crankcase?

Supposed PX crankcase

Sprint Casing
Molto Verboso
1979 P150X, 1983 P200E, 1987 T5, 1996 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 1644
Location: Veria, Greece
Mon Nov 11, 2019 8:39 am quote
First generation P series cases. Crank bearing was held on both sides with circlips...

Clutch side

Crank side

1984 PX(177)EFL
Joined: 14 Apr 2017
Posts: 207
Location: Cornwall UK
Mon Nov 11, 2019 10:53 am quote
The engine I'm working on now is 991030, and has '4' stamped next to the Piaggio logo, the same as the one in the first link of the two you posted. Mines VLX1M224***, which is a 1980 P150X; it has those two circlips that SaFiS shows in his post above.

The previous engine I did was also a 991030, and had an '8' stamped next to the Piaggio logo; that was a 1982 PX150E.

It looks to me like 991030 covers several models, or a progression of them, and it is the number next to the Piaggio logo that changes, like a revision number; a '4' and an '8' both still being VLX1M, but one a P150X, the other a PX150E.

I haven't got any Sprints (VLB1M?) to refer to, so don't know about those.
Vespa 152l2
Joined: 04 Dec 2018
Posts: 15
Location: location
Mon Nov 11, 2019 1:51 pm quote
Thanks guys that's really useful.
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