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Eng mounts

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

Eng mounts

Postby Peterp » Thu Oct 02, 2025 2:34 pm

Hello all,
I’m reading a lot about the various engine mounts, quite confusing for an oldie.
Anyway, I have a 175 series 3 standard, no tuning.
The rear wheel is slightly out of line and when I checked there is play/slack between the pivot bolt and the cones, not much but what I think is enough to perhaps cause this.
Any guidance/advice would be helpful.
Thanks
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Re: Eng mounts

Postby Toddy » Thu Oct 02, 2025 6:56 pm

Are small or large mounts currently fitted ?
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Re: Eng mounts

Postby Peterp » Thu Oct 02, 2025 9:29 pm

Hello Toddy,
Thanks for the reply. Standard TV large mounts. I take it that when you say small mounts you mean the type fitted to LI’s.
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Re: Eng mounts

Postby Storkfoot » Fri Oct 03, 2025 7:34 am

Often the rear of the frame looks out of line because of the position of the frame loop not the mounts. Your TV should have the bigger engine mounts and cones with the chamfer on the outer edge as these are slightly wider than the early LI ones.

As regards the engine mounts themselves, you can usually see whether they need replacing from visual inspection. The rubber will be collapsing on one side.
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Re: Eng mounts

Postby Peterp » Fri Oct 03, 2025 3:58 pm

Thanks again, just so I contribute correctly, my misalignment is the wheel, is that the same as the frame loop? Sorry to be so daft. And, I was wondering what mountings you experienced people out there would fit? I’ve seen £25 ones to £56. Within reason and to do the job properly the cost is what it will be.
As this is a recent purchase and I have no history to go on I’m intending on replacing everything with regard to the engine fixing within the frame.
Appreciate your help and time taken to reply, many thanks.
Pete
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Re: Eng mounts

Postby gaz_powell » Sat Oct 04, 2025 8:26 am

Get UNI or SIL mounts.

You will also need the tool to extract and insert.

Though i have put them in with vice before
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Re: Eng mounts

Postby Storkfoot » Sat Oct 04, 2025 9:44 am

Storkfoot wrote:Often the rear of the frame looks out of line because of the position of the frame loop not the mounts. Your TV should have the bigger engine mounts and cones with the chamfer on the outer edge as these are slightly wider than the early LI ones.

As regards the engine mounts themselves, you can usually see whether they need replacing from visual inspection. The rubber will be collapsing on one side.


I was assuming that you meant that, if you look from behind, the wheel does not appear to look central to the bottom of the number plate. If, however, you mean that the back wheel does not follow the front wheel in a straight line, that may well be a collapsed engine mount or the wrong cone.
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Re: Eng mounts

Postby Peterp » Sat Oct 04, 2025 10:42 am

It’s the back wheel out of line with the number plate. It rides, in my opinion which comes from scootering many years ago, well and without handling issues. The fastest I’ve been was about 55mph.
It just annoys me when I look at it, when my son was following he said it was quite noticeable.
So I’m hoping replacing all that holds engine in place will sort it. We have looked very closely at the frame and all looks good.
Thank you all once again. And thanks for the advice on makes.
Pete
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