OP
@lars_danner avatar
UTC

Hooked
2014 GTV300; 2009 S50
Joined: UTC
Posts: 163
Location: Anchorage AK
 
Hooked
@lars_danner avatar
2014 GTV300; 2009 S50
Joined: UTC
Posts: 163
Location: Anchorage AK
UTC quote
Will it bolt right in?
Forum member supplied image with no explanatory text
Forum member supplied image with no explanatory text
OP
@lars_danner avatar
UTC

Hooked
2014 GTV300; 2009 S50
Joined: UTC
Posts: 163
Location: Anchorage AK
 
Hooked
@lars_danner avatar
2014 GTV300; 2009 S50
Joined: UTC
Posts: 163
Location: Anchorage AK
UTC quote
Bump
@stickyfrog avatar
UTC

Moderatus Rana
MP3 250 and 2 MP3 500s
Joined: UTC
Posts: 22659
Location: Nashville, Indiana
 
Moderatus Rana
@stickyfrog avatar
MP3 250 and 2 MP3 500s
Joined: UTC
Posts: 22659
Location: Nashville, Indiana
UTC quote
Lars_Danner wrote:
Bump
Let's not start bumping this everyday OK? It gets annoying. Give it more time.
@adri avatar
UTC

Atypical Canadian
2009 Vespa S50(LX150 motor swap), 2006 Vespa GTS250ie
Joined: UTC
Posts: 2318
Location: Toronto, Canada
 
Atypical Canadian
@adri avatar
2009 Vespa S50(LX150 motor swap), 2006 Vespa GTS250ie
Joined: UTC
Posts: 2318
Location: Toronto, Canada
UTC quote
I don't know if it's a direct fit, but you can swap them.

I do believe that the LX has a security system, that I'm not sure if the S does, so if you're using some kind of ignition module for the LX, you may also want the matching key.

I'm not super knowledgeable on this though so I'm going to defer to smarter people who will hopefully chime in after me.
@wheelman-111 avatar
UTC

Addicted
2010 S50 Modified "Punkin"; 2003 ET4 Malossi 187 "ISO"
Joined: UTC
Posts: 778
Location: Deepinnaharta, Texas
 
Addicted
@wheelman-111 avatar
2010 S50 Modified "Punkin"; 2003 ET4 Malossi 187 "ISO"
Joined: UTC
Posts: 778
Location: Deepinnaharta, Texas
UTC quote
Greetings:

I've looked at my 2003 ET with a Leader engine, a little, compared to a 2010 S50. Physically should fit, but first you may have to sort out spacers and things for the engine mount. One big electrical difference is that the 50 runs the headlamp right off the alternator, while the 150 light comes on with the key. The 150 uses a bigger battery.

Speaking of keys, AFAIK all the S models came with black keys and no immobilizer. Even the 2003 ET has a blue key and immobilizer flasher in the dash. There may be work-arounds, but the simplest thing would seem to be acquiring the entire wiring harness and instrument cluster from a 150 to swap along with the engine. The 50 cc speedometer only reads up to 50, don't want to bend that needle going around the dial...

It only makes sense if you enjoy the process and challenges as I do. Please post some pics if you decide to proceed, but Financially, probably better sell or part out both and find a decent 150 to start with.
OP
@lars_danner avatar
UTC

Hooked
2014 GTV300; 2009 S50
Joined: UTC
Posts: 163
Location: Anchorage AK
 
Hooked
@lars_danner avatar
2014 GTV300; 2009 S50
Joined: UTC
Posts: 163
Location: Anchorage AK
UTC quote
Wheelman-111 wrote:
Greetings:

***
Speaking of keys, AFAIK all the S models came with black keys and no immobilizer. Even the 2003 ET has a blue key and immobilizer flasher in the dash. There may be work-arounds, but the simplest thing would seem to be acquiring the entire wiring harness and instrument cluster from a 150 to swap along with the engine....
***
Hmmm... I'm wondering if I can just use the 50's CDI with the 150 engine.
UTC

Veni, Vidi, Posti
Joined: UTC
Posts: 6847
Location: Tega Cay, SC
 
Veni, Vidi, Posti
Joined: UTC
Posts: 6847
Location: Tega Cay, SC
UTC quote
Yes, as far as I know, it will fit. But you also need the whole security system (CDI with key, immobilizer) maybe the shock, exhaust, possible wiring harness or adapt, gauge cluster, etc...
@wheelman-111 avatar
UTC

Addicted
2010 S50 Modified "Punkin"; 2003 ET4 Malossi 187 "ISO"
Joined: UTC
Posts: 778
Location: Deepinnaharta, Texas
 
Addicted
@wheelman-111 avatar
2010 S50 Modified "Punkin"; 2003 ET4 Malossi 187 "ISO"
Joined: UTC
Posts: 778
Location: Deepinnaharta, Texas
UTC quote
Greetings:

There are few people in this world who know less than I about Engine Control Modules, but consider that my (4-valve) 50 happily revs to near 10K RPM. I don't believe the 150 can safely spin that high. If the ECM is for the 50, the 150 will lose over-rev protection to that extent. I have no certainty, but things like spark advance curves may also differ considerably. It may run - and I really hope it does - but it may not run correctly.
@motovista avatar
UTC

Veni, Vidi, Posti
GT 2.4
Joined: UTC
Posts: 8975
Location: Watts, Cherokee Nation
 
Veni, Vidi, Posti
@motovista avatar
GT 2.4
Joined: UTC
Posts: 8975
Location: Watts, Cherokee Nation
UTC quote
If you are putting the engine in, the immobilizer chip doesn't matter. It operates through the CDI, and not the engine itself. I'm not sure how the timing will be on the 150 vs 50, but you might even be able to use the stator from the S on the 150 motor. The flywheels are the same diameter. The cranks are different sizes though, so there's no way the flywheel from the 50 will fit on the 150. If the S is a 4 valve, it might be easier to convert over, because it uses a similar CDI arrangement as the LX does, but without the immobilizer.
Take this for what it costs, and remember that I used the word "might" quite a bit. I have no actual experience making this swap.
The body is the same for both displacements, they mount the same, and if you look at the differences between the harness for the S150 and the S50, you will get a better idea of what needs to be different. You can straight up swap an LX and S 150 carb engine all day long, so wherever the harness for the S150 and S50 diverge is where you will need to figure workarounds.
You would need the rear shock and exhaust for the ET4, LX, S 150. And burying the speedometer will be a lot easier than before, if you don't change anything.
The two valve S50 uses a combined CDI and coil. If you can get it to trigger, it should run the engine, but I'm not sure how well or for how long. The voltage regulators are different, and the 150 expects to run 55/60 watt bulbs, while the 50 is 30/30watt.
@greasy125 avatar
UTC

Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: UTC
Posts: 14906
Location: The state of insanity, SoCal
 
Sergeant at Arms
@greasy125 avatar
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: UTC
Posts: 14906
Location: The state of insanity, SoCal
UTC quote
the motor is a direct bolt in. you'll need a complete 150 harness. LX or LXS doesn't matter, you may need to do a bit of fiddling up at the headset connectors, so do yourself a favor and get a 150 speedometer now, it'll make everything so much easier in the future.

and when I say complete, I mean COMPLETE- CDI, voltage regulator, ALL the relays, bulb plugs, EVERYTHING.

don't go mucking about trying to scab in a 150 into the 50 harness, that's a fools errand. buy a complete motor and just knock it in.

like Moto said, you'll need a new rear shock and and exhaust for a 150.

you'll need to strip the bike COMPLETELY down, minus the fork to run all the wiring, drop the tank a little to deal with the fiddly bits out back.

don't forget to disconnect the rear brake cable.

you'll also need a new battery and battery tray. pretty sure the intake bellows are different as well.

other than that, it's just a lot of tedious work. good luck and hit me up if you need any parts.
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