OP
UTC

Enthusiast
Px kitted and blinged
Joined: UTC
Posts: 96
Location: Uk West Yorkshire
 
Enthusiast
Px kitted and blinged
Joined: UTC
Posts: 96
Location: Uk West Yorkshire
UTC quote
Px 125 2011, (the engine has no spare metal in order to case match the transfer ports, and has updated stator, flywheel and cdi unit, all retro replaced.)

Malossi 166 kit straight bolt on.
22 tooth Cosa clutch
Mazzucchelli race cut crank
Ducati cdi unit, matching stator+electric start flywheel
Ngk BR8HS
Pinasco exhaust

24 mm si carb (straight bolt on)
Drilled at heart air filter, gauze replaced OEM found to restrict air flow
Auto lube and adding 1% extra oil to petrol

Main stack
160 Air corrector
BE3 mixer tube
125 main jet

Idle Jet 52/140

Sip fast flow fuel tap
Sip Race bearing flywheel side ( a must in my book)

Sip speedo, Vespa speedo drive
Scooter top speed as per Sip speedo,73 mph
Cruise at 60 mph
Rev counter matches speed (MPH) as per scooterhelp gearing calculator by +1mph that is my speedo is showing I'm going faster by 1 mph.
Top rev's achieved in third gear 8000 rpm.
Rider weight (me) 170 lbs.

A note on road speed, the police go to a lot of trouble to give accurate actual road speed, you cant rely on speedo or gps to be totally accurate.
@scooterist avatar
UTC

Molto Verboso
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: UTC
Posts: 1614
Location: Tucson, AZ
 
Molto Verboso
@scooterist avatar
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: UTC
Posts: 1614
Location: Tucson, AZ
UTC quote
^^ my set up is simpler but yields same results:

05 PX150 (05 only year imported)
put malossi 166 at 3200 miles and ridden it very hard with no break in for 2300 miles so far.
changed carb to 24 or 26(can't remember), scooter came with sito plus. My main jet is 115. I reached 75mph (speedo reading ) tucked in but I also seen around 70-72mph indicated sitting up right.

In my opinion the malossi 166cc is very weak compared to polini(I had polini on a Stella before) and it also feels torque less compared to my other 200cc P and sprint. It even feels less torqy than a stock P200E engine.

If I had to do it again I would prefer tying the BGM 177 or the DR or the pinasco. My top speed when the scooter was stock was 58mph(indicated)
⬆️    About 2 months elapsed    ⬇️
@malta_mick avatar
UTC

Hooked
GTS300
Joined: UTC
Posts: 131
Location: Malta
 
Hooked
@malta_mick avatar
GTS300
Joined: UTC
Posts: 131
Location: Malta
UTC quote
i have a px 125 with 166 kit and pollini exhaust. this finishes quite close to rear wheel and i get a lot of oil splatter. Is there a better exhaust to fit that will bring pipe further out from body ?
@socalguy avatar
UTC

bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7223
Location: So Cal
 
bodgemaster
@socalguy avatar
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7223
Location: So Cal
UTC quote
Our SIP Road produces a lot of rear wheel splatter. Our BGM Big Box seems to produce less.
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