Pinky Vespa et2 big block 172cc

[limera1n]

Hi guys!

I have a Vespa et2 stock and Piaggio Hexagon 125cc 2t stock. I wonna to swap engine from hexagon to et2. That's an easy swap and I have zero questions about it.

Here is what I would like to ask:

What setup do you recommend for me? (I would like to get 23-25 bhp with wide rpm working range)
For now I settled with 

172cc malossi
pm tuning head (or should I just go with the stock head from 125cc?)
Bgm crankshaft
malossi (dellorto) PHBL 25 carburetor (Everyone says that's a crappy one but what's the alternative ideally with electronic enrichment?)
Reed block tassinari vforce 4
Stock Piaggio Hexagon 125cc exhaust (Any advice how to modify it?)
Malossi multivar 2000 MHR
Malossi Delta clutch system
Malossi X-K Belt

Any comments on this? I would be glad to any advice!

P.S. Where can I find how to do poring on a 125cc big block engine?

[repherence2]

i dunno vespas but here you go on the porting...

porting a block

lot's of useful porting info in that blog as well.

porting cylinder

tuning and rebuilding a piaggio engine


hope it helps. it taught me a lot. i used the info and applied it to minarelli stuff for me.

[aeroxbud]

There is a lack of parts for the 125/180 two strokes now. Used to be so much stuff for them but most is discontinued now.
So I guess go with the Malossi. The PM Tuning stuff used to make the most power. But it's not available any more.
Are you in the uk? Perhaps give PM Tuning, or shiny red tuning a call. Both used to specialise in the big Piaggio two strokes. Though not anymore.

[limera1n]

Nov 7, 2021 13:36:28 GMT -5 repherence2 said:

i dunno vespas but here you go on the porting...

porting a block

lot's of useful porting info in that blog as well.

porting cylinder

tuning and rebuilding a piaggio engine


hope it helps. it taught me a lot. i used the info and applied it to minarelli stuff for me.

Thanks a lot! Useful stuff here

[limera1n]

Nov 7, 2021 14:01:39 GMT -5 aeroxbud said:

There is a lack of parts for the 125/180 two strokes now. Used to be so much stuff for them but most is discontinued now.
So I guess go with the Malossi. The PM Tuning stuff used to make the most power. But it's not available any more.
Are you in the uk? Perhaps give PM Tuning, or shiny red tuning a call. Both used to specialise in the big Piaggio two strokes. Though not anymore.

I'm not in the UK. I'm currently in Russia but I have access to most of the parts from sip-scootershop. I know that big blocks are a little bit out of trend now so I'm looking for old funs of this engine to get valuable advice based on experience.