2003 ET4 Liberty Engine Malossi 187cc Cylinder Kit
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Hooked
2010 S50 Modified "Punkin"; 2003 ET4 150 "ISO"
Joined: 18 Feb 2017
Posts: 285
Location: Deepinnaharta, Texas
Thu Jun 25, 2020 4:42 pm quote
Greetings:

Getting ready to pull the trigger on this upgrade. At least one reliable source tells me that installing the kit limits the engine to "only" 40,000 miles, at which time the lower end bearings lose their will to live. Now the sun may explode before I get ISO to that mileage, given the short-distance rides I make to the Post Office and dry cleaners here in Deepinnaharta, but has anyone experienced even earlier premature failure as a result of installing the Malossi kit?

I really don't NEED the extra power, as opportunities to exceed 60 MPH here are infrequent, but the idea of being ABLE to take to the highway and cruise at 70 (I have the aftermarket primary gears...) is attractive, as are the bragging rights of nudging up to GTS-level top speeds. Still, I am pleased overall with the performance of the 150 as delivered, with the Aftermarket clutch, variator and (soon) the SitoPlus exhaust. I have the money, I have some time occasionally to perform the cylinder swap. Lord knows I need the Garage Therapy. Anyone with a reason to talk me out of this?

ET4ScrAftr.jpg

Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: 21 Oct 2005
Posts: 7741
Location: The state of insanity, SoCal
Thu Jun 25, 2020 5:31 pm quote
I will not talk you out of it.

Install and be delighted.

-g
Ossessionato
2014 Commuter BV350(44,000)/2015 Scoot Life BV350(10,000)/2010 El Diablito SH150i(29,000)
Joined: 27 Dec 2013
Posts: 2435
Location: Orange Park Florida
Fri Jun 26, 2020 1:44 am quote
I've been running Malossi (no BBK for the BV) for about 35,000 miles. Wouldn't want to ride a stock set-up. Did you buy it for the resale value?
Go for it Turn some heads
Molto Verboso
2018 LIBERTY 150S, 2013 Kymco LIKE200iLX
Joined: 26 Jul 2013
Posts: 1160
Location: Ohio
Fri Jun 26, 2020 3:24 am quote
I don't own a Vespa - but is an ET4 the "small frame" version?
With 10" wheels?
And shorter wheelbase?
And no one here is concerned about your plan to go cruising at 70MPH?!
Bad form, here, to do so...I guess.
O.S.
Veni, Vidi, Posti
LX190, Primavera
Joined: 12 Oct 2007
Posts: 6482
Location: New Zealand
Fri Jun 26, 2020 3:30 am quote
OldSchooot wrote:
I don't own a Vespa - but is an ET4 the "small frame" version?
With 10" wheels?
And shorter wheelbase?
And no one here is concerned about your plan to go cruising at 70MPH?!
Bad form, here, to do so...I guess.
O.S.
It's the precursor to the LX. You don't actually gain much top end speed with the upgrade but you get there a hell of a lot sooner.
Hooked
2010 S50 Modified "Punkin"; 2003 ET4 150 "ISO"
Joined: 18 Feb 2017
Posts: 285
Location: Deepinnaharta, Texas
Mon Jun 29, 2020 4:37 pm quote
Greetings:

One iteration of Flash - 2001 Honda SA50 - features a 51mm x 44.4 90cc ministroker engine. It touched 80 MPH on 90/90 x10 wheels. This scooter weighs a full 100 pounds LESS than either Vespa.
Stability INcreases as speeds rise, though 95mm DRUM brakes at each wheel compelled discretion. In what was perhaps a stroke of good fortune, I managed to hole a piston with a rookie jetting error.

Not really worried about top speed, but the holeshot through traffic is more important.
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