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chrome frame collar fitting

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

chrome frame collar fitting

Postby mr mugello » Wed Feb 22, 2017 7:11 pm

Will cooling metal chrome collar in a freezer help ease fitment in the frame tube ?
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Re: chrome frame collar fitting

Postby Knowledge » Wed Feb 22, 2017 10:36 pm

Worth a try, but if my experience of getting one out last week was not fun.

It is brittle, so don't hit it too hard.
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Re: chrome frame collar fitting

Postby mr mugello » Mon Feb 27, 2017 4:08 pm

Original rechromed fitted back in a lot easier than getting out. Well worth the hassle removing. Religning the grub screw with hole I was concerned with messing up, but able to push in frame by hand three quarters of way.
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Re: chrome frame collar fitting

Postby Phil D » Mon Feb 27, 2017 5:08 pm

mr mugello wrote:Original rechromed fitted back in a lot easier than getting out. Well worth the hassle removing. Religning the grub screw with hole I was concerned with messing up, but able to push in frame by hand three quarters of way.

Just out of interest what's the going rate for a C/R re-chrome at the moment?
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Re: chrome frame collar fitting

Postby mr mugello » Wed Mar 01, 2017 11:52 am

Spoke too soon. Every thing was going well. Fitting headset bottom, the gap is not even. One side is up to 2mm roughly different. Never noticed this before removal, but my eye picks up these when refitting. Bit annoying. Can either headset clamp and collar be prone to distorting even though cast items ? Thanks
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Re: chrome frame collar fitting

Postby Warkton Tornado No.1 » Wed Mar 01, 2017 3:52 pm

Even with non-chrome ring headsets you might need to adjust the seating of the headset by fitting shims (washers) of varying thicknesses between the headset casting & the headset clamp. It can take considerable time to get the fit right.

You can’t just ‘assemble‘ Lambrettas, you have to ‘fit’ them.

It wouldn't be the first time that the slot in the fork (where the clamp screw engages) has had to be widened upwards or downwards to allow a better fit of the headset to the leg-shields....
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Re: chrome frame collar fitting

Postby mr mugello » Wed Mar 01, 2017 4:25 pm

Phil D wrote:
mr mugello wrote:Original rechromed fitted back in a lot easier than getting out. Well worth the hassle removing. Religning the grub screw with hole I was concerned with messing up, but able to push in frame by hand three quarters of way.

Just out of interest what's the going rate for a C/R re-chrome at the moment?
paid £23 including postage at Quality Chrome Hull.
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Re: chrome frame collar fitting

Postby mr mugello » Wed Mar 01, 2017 4:26 pm

Warkton Tornado No.1 wrote:Even with non-chrome ring headsets you might need to adjust the seating of the headset by fitting shims (washers) of varying thicknesses between the headset casting & the headset clamp. It can take considerable time to get the fit right.

You can’t just ‘assemble‘ Lambrettas, you have to ‘fit’ them.

It wouldn't be the first time that the slot in the fork (where the clamp screw engages) has had to be widened upwards or downwards to allow a better fit of the headset to the leg-shields....

Thanks will give shims ago.
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Re: chrome frame collar fitting

Postby Warkton Tornado No.1 » Wed Mar 01, 2017 4:42 pm

mr mugello wrote:
Warkton Tornado No.1 wrote:Even with non-chrome ring headsets you might need to adjust the seating of the headset by fitting shims (washers) of varying thicknesses between the headset casting & the headset clamp. It can take considerable time to get the fit right.

You can’t just ‘assemble‘ Lambrettas, you have to ‘fit’ them.

It wouldn't be the first time that the slot in the fork (where the clamp screw engages) has had to be widened upwards or downwards to allow a better fit of the headset to the leg-shields....

Thanks will give shims ago.


Perhaps this is ‘too much’ information, but as I have the Helicoiling kit to hand, I have from time to time, Helicoiled to M6 so avoiding having to use nuts @ the bottom. Just screw straight into the clamp, preferably with an M6 SHCS (Socket Head Cap Screw). Now, that does make life a lot easier, especially when shimming!

Another one of my ‘Top Tips’ :roll: Hah!
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Re: chrome frame collar fitting

Postby mr mugello » Thu Mar 02, 2017 11:40 pm

Fitting a thin shim through one of the bolts between headset base and clamp bracket done the trick.
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