300 GTS Engine into 250 GTV?
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Ossessionato
'10 GTS 300 Super, '79 Vespa P200E, '04 Vespa PX200, 2011 SportCity 300 Cube [Sold]
Joined: 06 Sep 2006
Posts: 2919
Location: San Francisco, CA
Fri Oct 19, 2018 11:43 am quote
Searched for this but wasn't able to find anything on this, but a friend of mine has a 2007 GTV with 25k+ miles. Engine runs fine, but he ran across a totaled 2014 GTS 300 with a fully functional engine.

Is it possible to swap in a 300 engine into a 2007 GTV? I'm guessing the engine would fit, but wiring and gauges all seem different?
Veni, Vidi, Posti
LX150, GTS300, BV350, EN650
Joined: 26 Jul 2017
Posts: 5233
Location: Home of the Alamo
Fri Oct 19, 2018 12:01 pm quote
I do believe that should work. A few weeks ago I ran across a very old thread on virtually the same subject about how Vepsa had shipped some "300" engines in the GTS 250 body, so it sounds like at 300 in a 250 GTV body ought to work. I'll try looking for the old thread and if I find it, I'll post it here.

Experts?
Hooked
GTS 250
Joined: 26 Apr 2008
Posts: 218
Location: California
Fri Oct 19, 2018 3:39 pm quote
Re: 300 GTS Engine into 250 GTV?
Wangta wrote:
Searched for this but wasn't able to find anything on this, but a friend of mine has a 2007 GTV with 25k+ miles. Engine runs fine, but he ran across a totaled 2014 GTS 300 with a fully functional engine.

Is it possible to swap in a 300 engine into a 2007 GTV? I'm guessing the engine would fit, but wiring and gauges all seem different?
The first option would be retrofitting just the 300 longblock using the 250 accessories, which I think it will work. Here is a start to what I would consider reusing from the 250:
- Intake manifold (or at least the throttle body & injector)
- lambda sensor
- stator? not sure if this is neccessary, but the change in the stator cover leads me to believe there were changes to the stator itself, and possibly the wiring.
- other parts that were changed for ABS

The other option would be swapping in all the 300 parts. This would be much more work, but you would essentially have a 2014 bike when done Here is another partial list of what would need to be swapped from the 300:
- Gauge cluster (and handle bar rear cover? not sure if the 2014 had the extra button, or where it would go on the GTV)
- ABS parts for the front suspension, which would require a 2017+ caliper carrier (and probably more)
- Fuel pump (return less vs return style)
- Entire wiring harness
- probably many more parts that I can't think of...
Molto Verboso
08 GTS 250, 79 P200E, 62 Allstate
Joined: 11 Jan 2006
Posts: 1177
Location: Florence, OR
Fri Oct 19, 2018 9:36 pm quote
Might be worth a call to Robot at Vespa Motorsports in San Diego. I'd bet he'd know the specifics of making this happen. Good luck and post back the results!
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Granturismo 218
Joined: 04 Feb 2013
Posts: 5348
Location: South Carolina
Fri Oct 19, 2018 11:28 pm quote
Jet Peddler wrote:
I do believe that should work. A few weeks ago I ran across a very old thread on virtually the same subject about how Vepsa had shipped some "300" engines in the GTS 250 body, so it sounds like at 300 in a 250 GTV body ought to work. I'll try looking for the old thread and if I find it, I'll post it here.

Experts?
No matter how many times this gets reposted, it never happened. Piaggio continued making the 250 engine long after they introduced the 300. Different markets, different rules.
Some of the early 300 engines used the same stator as the 250. I suspect the ECU would be the biggest obstacle to making this work.
Veni, Vidi, Posti
LX150, GTS300, BV350, EN650
Joined: 26 Jul 2017
Posts: 5233
Location: Home of the Alamo
Sat Oct 20, 2018 6:47 am quote
Motovista wrote:
Jet Peddler wrote:
I do believe that should work. A few weeks ago I ran across a very old thread on virtually the same subject about how Vepsa had shipped some "300" engines in the GTS 250 body, so it sounds like at 300 in a 250 GTV body ought to work. I'll try looking for the old thread and if I find it, I'll post it here.

Experts?
No matter how many times this gets reposted, it never happened. Piaggio continued making the 250 engine long after they introduced the 300. Different markets, different rules.
Some of the early 300 engines used the same stator as the 250. I suspect the ECU would be the biggest obstacle to making this work.
My entire belief in the internet has been shattered.

This is all so sudden.
Molto Verboso
2016 Vespa GTS300ie abs/asr/ess Settantesimo '70'
Joined: 11 Jun 2011
Posts: 1947
Location: Not really sure but I think somewhere down South, in the engineering dept at Starfleet's UK HQ
Sat Oct 20, 2018 6:55 am quote
Ok so this sounds like a good idea. However, just remember the 2014 bikes with abs/asr had a 32 bit ecu (as opposed to a 16 bit ecu on the 250) which has to be used with the later engines. The wiring loom is different too. In fact so much is different that I'd want to replace everything with the newer 2014 bike's stuff. This will mean the instrument cluster from the later bike being used, but there is a way round that I would imagine. Since i haven't done this mod it needs careful consideration.
Ossessionato
09 190s taormina
Joined: 08 Apr 2010
Posts: 2082
Location: Googleville
Sat Oct 20, 2018 10:13 am quote
Wangta wrote:
he ran across a totaled 2014 GTS 300 with a fully functional engine. Is it possible to swap in a 300 engine into a 2007 GTV?
Easily doable with a complete donor. If he doesn't go for it, care to share the info on the total?
Ossessionato
'10 GTS 300 Super, '79 Vespa P200E, '04 Vespa PX200, 2011 SportCity 300 Cube [Sold]
Joined: 06 Sep 2006
Posts: 2919
Location: San Francisco, CA
Sat Feb 09, 2019 11:12 am quote
Crap - the 2007 GTV engine completely died last week and the nearby shop took a look and gave a diagnosis: Seized piston, multiple marks on piston, crank shaft pretty much destroyed, broken cylinder head. There was plenty of oil in the engine so they said its likely old damage.

Argh. So reading these comments, it seems swapping in a similar year engine is easiest. But can I swap in say a 2009 250 GTS engine into the GTV without having to rip out and swap in wiring harnesses, etc? I was hoping to just take out engine and swap in a used one.

And bluecloud - we never got to buy the doner. They sold it before we even got to see it. Bah. But Iím not sure a 2014 would of been an ďeasyĒ swap.
Addicted
2014 GTV 300ie
Joined: 05 Mar 2016
Posts: 732
Location: Charleston SC
Sat Feb 09, 2019 6:37 pm quote
Correct me if Iím wrong, but didnít the 2014 GTS and GTV come without ABS? My understanding was always the ABS began in 2015. That would make the swap much easier, however, since you canít get the engine itís a moot point
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