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DL/GP 200 RT230 & BGM Exhaust

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

DL/GP 200 RT230 & BGM Exhaust

Postby LambrettaMarky » Fri Oct 03, 2025 7:32 pm

Folks

Can someone please advise the capabilities of the RT230?

Cruising speed, top speed & reliability etc?

Cheers..
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Re: DL/GP 200 RT230 & BGM Exhaust

Postby Rich Oswald » Sat Oct 04, 2025 3:49 pm

In my experience, Cruises at 60mph, top speed 75mph, Set up RT 230 Reed 30phbh, Avanti Ex-Box ST, AF 5 speed. Extremely reliable. Very good on fuel.
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Re: DL/GP 200 RT230 & BGM Exhaust

Postby dickie » Sat Oct 04, 2025 8:14 pm

I think a reed tuned RT is very different to a piston ported one.

My RT230 reed with ex-box and phbh30 goes very well (my speedo reeds 0mph at all speeds). I can keep up with and pass motorway traffic. It has a very linear power delivery, almost like a 4 stroke.

My other lambretta has a piston ported RT210 (RT195 with 62 stroke crank, casa clubman and phbl25 through drilled airbox). This feels very similar, but not as fast motorways.

In a nutshell, what I'm saying is that although they feel the same in power delivery, the reed version is a lot quicker.

But maybe the biggest difference is the carb?

And also maybe I just confused matters :lol:
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Re: DL/GP 200 RT230 & BGM Exhaust

Postby LambrettaMarky » Sun Oct 05, 2025 10:13 am

Rich Oswald wrote:In my experience, Cruises at 60mph, top speed 75mph, Set up RT 230 Reed 30phbh, Avanti Ex-Box ST, AF 5 speed. Extremely reliable. Very good on fuel.


Good info' - Thx Rich
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Re: DL/GP 200 RT230 & BGM Exhaust

Postby LambrettaMarky » Sun Oct 05, 2025 10:36 am

dickie wrote:I think a reed tuned RT is very different to a piston ported one.

My RT230 reed with ex-box and phbh30 goes very well (my speedo reeds 0mph at all speeds). I can keep up with and pass motorway traffic. It has a very linear power delivery, almost like a 4 stroke.

My other lambretta has a piston ported RT210 (RT195 with 62 stroke crank, casa clubman and phbl25 through drilled airbox). This feels very similar, but not as fast motorways.

In a nutshell, what I'm saying is that although they feel the same in power delivery, the reed version is a lot quicker.

But maybe the biggest difference is the carb?

And also maybe I just confused matters :lol:


Super - thanks for this..
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