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Round the world on a standard 150

Technical help for Series one, two and three Lambrettas. Models include the Li, Li Special, TV, SX, GP, Serveta and API/SIL models

Round the world on a standard 150

Postby TrackTen » Thu Dec 04, 2025 11:46 am

I am currently running something very close to a standard SX150 engine that was supposed to be only temporary and I have been very surprised with how much I like it. I had intended to build something with a bit more power for this scooter but now I am not so sure.

My question is - does anyone , has anyone, used a standard 150 in recent times as a go everywhere scooter , rallying etc ?

And do you think it would be madness and unbearable to try and ride it on a foreign trip of 800 or so miles each way ?
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Re: Round the world on a standard 150

Postby Solid Air » Thu Dec 04, 2025 11:51 am

If it reaches the speed you want it too then enjoy it for what it is and soak up the scenery as you ride. I did a big trip this summer and rode everywhere at 50-55mph, as I was in no rush and that was the speed limit. It's not always about going fast 8-)
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Re: Round the world on a standard 150

Postby Adam_Winstone » Thu Dec 04, 2025 2:20 pm

I did Milan 2-up in 97 with a GP150 motor in my bike. TBH it was absolutely fine, performance was good and petrol economy was excellent.

Ok, so not recently (lol) but I don't think the roads / logistics gave changed that much.

SX150 and GP150 exactly the same performance, regardless of what the books say and the 20mm vs 22.
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Re: Round the world on a standard 150

Postby TrackTen » Thu Dec 04, 2025 3:26 pm

Adam_Winstone wrote:I did Milan 2-up in 97 with a GP150 motor in my bike. TBH it was absolutely fine, performance was good and petrol economy was excellent.

Ok, so not recently (lol) but I don't think the roads / logistics gave changed that much.

SX150 and GP150 exactly the same performance, regardless of what the books say and the 20mm vs 22.


I completely agree with the last point - I have recently had a nice GP150 that went well but I think I prefer this engine with the 20mm carb on it and it is no slower than the GP was.

I also have a Li125 gearbox in currently on the SX , everyone says that gearbox is rubbish but i find it MUCH better than the GP/SX box. A doddle to pull away in traffic due to the silly low gear and 1st to 2nd not an issue - but 3rd to 4th miles better than the GP/SX box

On the standard 5.65 ratio that seems spot on - very decent hill climbing even in 4th for a 150

Thats a long way 2 up on a 150 , certainly proof then that its doable
Last edited by TrackTen on Thu Dec 04, 2025 3:29 pm, edited 1 time in total.
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Re: Round the world on a standard 150

Postby TrackTen » Thu Dec 04, 2025 3:27 pm

Solid Air wrote:If it reaches the speed you want it too then enjoy it for what it is and soak up the scenery as you ride. I did a big trip this summer and rode everywhere at 50-55mph, as I was in no rush and that was the speed limit. It's not always about going fast 8-)


If I am not trying to get anywhere in a hurry about 50 is a nice speed for me
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Re: Round the world on a standard 150

Postby Storkfoot » Thu Dec 04, 2025 3:29 pm

If you, say, took the Portsmouth to Caen ferry, you could weave your way through France from Caen for hundreds of miles without having to go on a fast A road. You would, however, need to either prepare your route properly, or set your SatNav correctly. It is easy to take a wrong turn and end up on a motorway though :oops:

I’d avoid the ferry ports near Rotterdam though. They can be too busy especially when coming back in to port.

I’m thinking of doing something similar next year on a standard 200. But, I’ll definitely not be taking camping gear or loads of tools and spares.
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Re: Round the world on a standard 150

Postby Scooterslag » Thu Dec 04, 2025 10:57 pm

TrackTen wrote:I am currently running something very close to a standard SX150 engine that was supposed to be only temporary and I have been very surprised with how much I like it. I had intended to build something with a bit more power for this scooter but now I am not so sure.

My question is - does anyone , has anyone, used a standard 150 in recent times as a go everywhere scooter , rallying etc ?

And do you think it would be madness and unbearable to try and ride it on a foreign trip of 800 or so miles each way ?


I don't do any long distance rallies but my standard SX150 is my only daily transport which carries me around quite nicely. I do think the humble 150 lump is undervalued today and ( for most stuff) is still a valid engine. On the subject of traveling around the world - there is a Italian couple who have covered some major touring distances around the globe on a standard SX150
https://www.facebook.com/wildrideonlambretta. All the best Paul
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Re: Round the world on a standard 150

Postby TrackTen » Sat Dec 06, 2025 9:21 am

Scooterslag wrote:
TrackTen wrote:I am currently running something very close to a standard SX150 engine that was supposed to be only temporary and I have been very surprised with how much I like it. I had intended to build something with a bit more power for this scooter but now I am not so sure.

My question is - does anyone , has anyone, used a standard 150 in recent times as a go everywhere scooter , rallying etc ?

And do you think it would be madness and unbearable to try and ride it on a foreign trip of 800 or so miles each way ?


I don't do any long distance rallies but my standard SX150 is my only daily transport which carries me around quite nicely. I do think the humble 150 lump is undervalued today and ( for most stuff) is still a valid engine. On the subject of traveling around the world - there is a Italian couple who have covered some major touring distances around the globe on a standard SX150
https://www.facebook.com/wildrideonlambretta. All the best Paul


Thanks for pointing me at that couple Paul - I had not seen their exploits. Looks like they have some amazing adventures on their 150.
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Re: Round the world on a standard 150

Postby Warkton Tornado No.1 » Sat Dec 06, 2025 1:09 pm

Back in the 70’s, if something was wrong with your ‘main’ scooter (200 cc minimum, of course :lol: ) you could buy a ‘hack’ to keep you mobile very cheaply.

So it was I bought a GP150 & rode it, caning it everywhere. Despite the infamous gearbox, it was ideal for purpose. The only thing I changed was the exhaust for a gutted ‘straight through box’ & the forks for a set of 200’s with disc brake. It revved on a bit more than OEM & accelerated quicker. Mind you, we had better fuel IMO! How people can ride any large frame without dampers is beyond me :roll:
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Re: Round the world on a standard 150

Postby TrackTen » Mon Dec 08, 2025 9:21 am

Warkton Tornado No.1 wrote:Back in the 70’s, if something was wrong with your ‘main’ scooter (200 cc minimum, of course :lol: ) you could buy a ‘hack’ to keep you mobile very cheaply.

So it was I bought a GP150 & rode it, caning it everywhere. Despite the infamous gearbox, it was ideal for purpose. The only thing I changed was the exhaust for a gutted ‘straight through box’ & the forks for a set of 200’s with disc brake. It revved on a bit more than OEM & accelerated quicker. Mind you, we had better fuel IMO! How people can ride any large frame without dampers is beyond me :roll:


Some dampers are going on over the winter but I am pretty sure my ears will not enjoy your exhaust upgrade :-)
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Re: Round the world on a standard 150

Postby Nudger » Tue Dec 09, 2025 10:02 am

150cc engines are vastly under appreciated in my opinion. I don't think Innocenti really wanted to go above 175cc. If you're riding on your own and making a long journey abroad then I'd say a standard 150cc is perfecto
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