Vintage help: Stock 150cc “Stella” engine vs. Stock P200
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Enthusiast
GTS 250ie, PX125E, P200E
Joined: 17 Jul 2008
Posts: 91
Location: Niagara Region, Canada
Wed Nov 12, 2008 12:33 pm quote
I’m considering a P-Series but am confused on what would best suit me in terms of power. I wouldn’t be concerned with highway riding, but would like a quick runner being that I’m accustomed to a modern 250cc. I’m looking into a stock 125cc that I may either have kitted, or swap the engine out of entirely depending on the situation. It’d prefer a larger model but have access to this type in specific.

I’m told the “new” 150cc 5 port engines used in the Stella’s perform well (if not better) than a stock P200 (non kitted) engine. They are also a bit more cost effective and readily available from what little I’ve lurked around for them. On the other hand I have a hard time believing that I wouldn’t be more satisfied with the P200 engine.

A friend also has a Rally with an engine he may need to replace, and it would likely be either of the two mentioned above.

Are the 150cc “5 Ports” really all that more effective than a stock P200E, or PX150?

What are some opinions or advise that you owners or those technically inclined could offer?

Any help is greatly appreciated.
Moderator
1965 Vespa SS180, 1963 Lambretta LI150
Joined: 05 Mar 2007
Posts: 6973
Location: Detroit, Michigan
Wed Nov 12, 2008 1:12 pm quote
I see that you put the "5 ports" in quotation marks ..which is good ...as it's really not 5 transfer ports through the cases at all. It's only 3, technically, through the cases ( last i checked ) that splits into 5 in the cylinder.

The only true 5 port stock engine was the T5.

Now, that being said .... the px150 / stella engine is cheaper to kit. ( the comparative price of 150cc upgrades are cheaper than 200cc upgrades )

I'd take an old italian P200 engine over a stella engine ANYDAY if given the choice.
Moderator
2006 PX 150 & Malossi Kitted Malaguti Yesterday (Wife's)
Joined: 11 Dec 2007
Posts: 12959
Location: Paros Island, Greece
Wed Nov 12, 2008 1:43 pm quote
Rover Eric wrote:
I see that you put the "5 ports" in quotation marks ..which is good ...as it's really not 5 transfer ports through the cases at all. It's only 3, technically, through the cases ( last i checked ) that splits into 5 in the cylinder.

The only true 5 port stock engine was the T5.

Now, that being said .... the px150 / stella engine is cheaper to kit. ( the comparative price of 150cc upgrades are cheaper than 200cc upgrades )

I'd take an old italian P200 engine over a stella engine ANYDAY if given the choice.
+1

Further, I'd take a modestly kitted Italian 150 over a kitted Stella engine.

You said:
Quote:
I wouldn’t be concerned with highway riding, but would like a quick runner being that I’m accustomed to a modern 250cc.
Could you be more specific as to what "quick runner" means?

Al
Enthusiast
GTS 250ie, PX125E, P200E
Joined: 17 Jul 2008
Posts: 91
Location: Niagara Region, Canada
Wed Nov 12, 2008 2:20 pm quote
...
Thanks for the input.

I used the quotes for the “5 port” as I’d read/heard something along the lines of what you had just mentioned above Eric.

What are your thoughts on the remaining “new” 200cc’s in production/stock? Are they comparable?

i.e.
http://www.scooterwest.com/item_detail/PX200E-New-Factory-Piaggio-Engine/1745/
and…

What I mean by “quick runner” is something that could keep up with inner city/rural driving based on the fact that I currently ride a GTS250, minus the highway riding aspects (for a 125cc at least). Ideally something that could hit 85-90kmh (55mph) without major stress.

Because it’ll be stock for the time being, should a PX 125cc be able attain that?
Olivia Newton-John
p200, vbb, gt200
Joined: 31 May 2006
Posts: 4484
Location: chippewa falls, wisconsin
Wed Nov 12, 2008 2:26 pm quote
my ancient p200 runs balls around my stella.
Enthusiast
GTS 250ie, PX125E, P200E
Joined: 17 Jul 2008
Posts: 91
Location: Niagara Region, Canada
Wed Nov 12, 2008 2:33 pm quote
...
Just thought of something…

Were the last PX150’s to roll off of the line running the exact same engine as the current Stella’s (2002 onward), or was it a different 150cc specific to Piaggio? If different - were they “5 port” (‘er 3) akin to the Stella, or not?

I realize that there was at one time a relationship in the factory that produces Stella’s being the one that also did the PX’s initially, but was that still the case toward the end of PX production in the last few years?

Thanks again…
Olivia Newton-John
p200, vbb, gt200
Joined: 31 May 2006
Posts: 4484
Location: chippewa falls, wisconsin
Wed Nov 12, 2008 2:35 pm quote
i think the px always had the 3, even the new ones.
Moderibbit
1980 P200E - "Old Rusty", 1976 ET3 Primavera
Joined: 12 Jun 2008
Posts: 8129
Location: Atlanta, GA
Wed Nov 12, 2008 3:09 pm quote
I believe 55mph is nearing the very top speed of modern PX150s. I don't know about stellas, and I don't know about vintage PX150s. If I had to guess, fewer emissions components might give the vintage PX150s a little bonus.

To my understanding, the PX200s are pretty phenomenal, with the same impressive engine of the P200Es but better gearing and locking cowls and a few other goodies. If you have access to one it is probably an excellent option. Those will do 55mph easily.
Ossessionato
Joined: 23 Sep 2008
Posts: 2633

Wed Nov 12, 2008 3:42 pm quote
Rover Eric wrote:
I'd take an old italian P200 engine over a stella engine ANYDAY if given the choice.
+1
Moderator
2006 PX 150 & Malossi Kitted Malaguti Yesterday (Wife's)
Joined: 11 Dec 2007
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Location: Paros Island, Greece
Wed Nov 12, 2008 9:42 pm quote
Re: ...
ChrisRC wrote:
What I mean by “quick runner” is something that could keep up with inner city/rural driving based on the fact that I currently ride a GTS250, minus the highway riding aspects (for a 125cc at least). Ideally something that could hit 85-90kmh (55mph) without major stress.

Because it’ll be stock for the time being, should a PX 125cc be able attain that?
My 2006 PX 150 (Euro market) is totally stock. 90 kph (indicated) is WOT. I've not checked the speedo with a GPS, but have paced it with our car at 80 kph and it showed to be 74 kph in the car. On generally level ground, performance at speeds up to 80 kph has been responsive.

That's the performance found on one PX 150. Keep in mind that this machine was not intended for routine highway (90 kph) riding. It's a great urban and secondary road machine. I would guess, that for what you want, the 200 engine is more appropriate.

Al
Hooked
'07 GTS250IE
Joined: 08 Nov 2008
Posts: 150
Location: Batavia, IL USA
Thu Nov 13, 2008 7:46 am quote
chad wrote:
my ancient p200 runs balls around my stella.
Ditto!
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