Technical help for Series one, two and three Lambrettas. Models include the Li, Li Special, TV, SX, GP, Serveta and API/SIL models
by Paulusgnome » Thu Aug 28, 2025 8:50 am
Just bought the above, but it has a horizontal fixing plate that should bolt to underside of the gearbox, but I have nothing to fix it to, do I leave it or cut it off ?
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Paulusgnome
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by L111amo » Thu Aug 28, 2025 10:52 am
There should be a threaded hole underneath, possibly the bolt has broken off flush
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L111amo
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by nsaints » Thu Aug 28, 2025 11:15 am
it could also be that the engine is early enough that no hole under the crankcase was drilled/tapped by the factory
my series 3 TV175 never had an exhaust mounting hole
I think you can drill the hole and tap it with the risk of breaking through and creating a handy, but unwanted, auxiliary oil drain hole, or do as I did and chop the bracket off the exhaust
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nsaints
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by Paulusgnome » Thu Aug 28, 2025 12:06 pm
L111amo wrote:There should be a threaded hole underneath, possibly the bolt has broken off flush
no hole evident, thanks
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Paulusgnome
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by Paulusgnome » Thu Aug 28, 2025 12:07 pm
nsaints wrote:it could also be that the engine is early enough that no hole under the crankcase was drilled/tapped by the factory
my series 3 TV175 never had an exhaust mounting hole
I think you can drill the hole and tap it with the risk of breaking through and creating a handy, but unwanted, auxiliary oil drain hole, or do as I did and chop the bracket off the exhaust
thanks, i'll cut the bracket off , easier and safer solution .....
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Paulusgnome
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by Storkfoot » Thu Aug 28, 2025 12:18 pm
Paulusgnome wrote:nsaints wrote:it could also be that the engine is early enough that no hole under the crankcase was drilled/tapped by the factory
my series 3 TV175 never had an exhaust mounting hole
I think you can drill the hole and tap it with the risk of breaking through and creating a handy, but unwanted, auxiliary oil drain hole, or do as I did and chop the bracket off the exhaust
thanks, i'll cut the bracket off , easier and safer solution .....
I’d just leave it on. It won’t do any harm and would be useful if the exhaust later gets fitted to another casing.
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Storkfoot
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by nsaints » Thu Aug 28, 2025 1:21 pm
On the other hand I had a weird vibration with the bracket knocking unfastened against the bottom of the engine..
Off it came

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nsaints
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by Toddy » Thu Aug 28, 2025 9:49 pm
Storkfoot wrote:Paulusgnome wrote:nsaints wrote:it could also be that the engine is early enough that no hole under the crankcase was drilled/tapped by the factory
my series 3 TV175 never had an exhaust mounting hole
I think you can drill the hole and tap it with the risk of breaking through and creating a handy, but unwanted, auxiliary oil drain hole, or do as I did and chop the bracket off the exhaust
thanks, i'll cut the bracket off , easier and safer solution .....
I’d just leave it on. It won’t do any harm and would be useful if the exhaust later gets fitted to another casing.
+1
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Toddy
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