GT 240 Options

Anything related to Lambrettas... ask tech questions, post helpful info, or just read and learn.
MickBH
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Posts: 3
Joined: Thu Jan 14, 2021 9:25 am
Main scooter: Lambretta Series 2
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Fri Jan 15, 2021 9:40 am

I have a GT 240 built on Intercontinental cases, running Dellorto 30mm carb and BGM Clubman exhaust.

It’s a superb engine but I’m after a bit more power.

I’ve heard that an expansion chamber can really wake these up, can anyone recommend a pipe that’s not too peaky and not too noisy?

GeorgeS
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Posts: 238
Joined: Fri Feb 27, 2015 1:58 pm
Main scooter: 1961 Series II Granturismo 240
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Fri Jan 15, 2021 1:40 pm

The recommended expansion is (I think) a Fran Race, which is what I use on my GT240. It does give a nice power band once you get over 5k rpm without taking too much away at lower revs.

I've never used a clubman so can't say how it compares, but I did have a borrowed JL3 on this kit initially which delivered a very flat power delivery, which I found boring & much prefer the Fran Race.

I notice Eden now lists a 64/110 crank for sale which I think would go straight in to your cases. A much more disruptive change of course, but thought I'd mention it as it could be something to consider on a future rebuild as that would deliver a few extra cc's & power.

MickBH
registered user
Posts: 3
Joined: Thu Jan 14, 2021 9:25 am
Main scooter: Lambretta Series 2
Contact:

Fri Jan 15, 2021 11:48 pm

Thanks George that new crank does look interesting.

How do you find the noise level on the Franspeed Race? Is it a similar level to the JL3?

GeorgeS
registered user
Posts: 238
Joined: Fri Feb 27, 2015 1:58 pm
Main scooter: 1961 Series II Granturismo 240
Contact:

Sat Jan 16, 2021 12:38 am

It was a few years back so hard to remember but I think was around the same.

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