Technical help for Series one, two and three Lambrettas. Models include the Li, Li Special, TV, SX, GP, Serveta and API/SIL models
by rogscoot » Tue Jul 01, 2025 1:22 pm
Was there a fundamental flaw with the S1 framebreather air intake design? Obviously it was changed over to the usual air intake we know and love later but was that a cost saving exercise or a way to fix some underlying issues?
Cheers,
Rog
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rogscoot
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by Knowledge » Wed Jul 02, 2025 8:02 am
A cost saving matter. Almost every modification Innocenti made to their Lambretta were to reduce production costs so look no further.
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Knowledge
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by Rich Oswald » Wed Jul 02, 2025 9:28 am
Knowledge wrote:A cost saving matter. Almost every modification Innocenti made to their Lambretta were to reduce production costs so look no further.
I'm not sure I agree with that Martin. I'm sure cost saving was always in their minds but improvements were made with every model i'm sure of that. Right from the Model A through to the GP/DL. Every new model was an improvement on the last from drum brakes to disc brakes, from LI150 gearbox to GP200 box, 18mm carbs to 22mm carbs, the list goes on. I can't see any of those as cost cutting. Just my thoughts.
Rich'
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Rich Oswald
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by steveg » Wed Jul 02, 2025 2:04 pm
rogscoot wrote:Was there a fundamental flaw with the S1 framebreather air intake design? Obviously it was changed over to the usual air intake we know and love later but was that a cost saving exercise or a way to fix some underlying issues?
Cheers,
Rog
The story I heard was that the air intake got covered by long coats, luggage etc and the engine couldn't breathe.
Something similar happened when a mate stuffed a rag into the toolbox of his Jet 200. Covered the air intake so it wouldn't run, cleared as soon as it was removed
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steveg
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by Rich Oswald » Wed Jul 02, 2025 5:02 pm
steveg wrote:rogscoot wrote:Was there a fundamental flaw with the S1 framebreather air intake design? Obviously it was changed over to the usual air intake we know and love later but was that a cost saving exercise or a way to fix some underlying issues?
Cheers,
Rog
The story I heard was that the air intake got covered by long coats, luggage etc and the engine couldn't breathe.
Something similar happened when a mate stuffed a rag into the toolbox of his Jet 200. Covered the air intake so it wouldn't run, cleared as soon as it was removed
I have heard that too Steve.
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Rich Oswald
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