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Fitting a disc brake kit

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

Fitting a disc brake kit

Postby P D: SC Chester » Thu Dec 29, 2016 1:40 am

Ordered one, are they hard to fit - any tips?


Cheers
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Re: Fitting a disc brake kit

Postby Norrie Bodge » Thu Dec 29, 2016 6:20 am

Easy as m8
Only thinking bit is which route 2-take 4 the hydraulic hose!
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Re: Fitting a disc brake kit

Postby Mel K » Thu Dec 29, 2016 7:17 am

Or whether to have a hidden master cylinder or not ?
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Re: Fitting a disc brake kit

Postby CHRIS in MARGATE » Thu Dec 29, 2016 9:37 am

It's the cutting /drilling through that rare headset that makes you think. I went through the bottom but you do have to cut a deeper slot than you first plan for because the headset top overlaps. Total time was about 75 mins. Worth it.
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Re: Fitting a disc brake kit

Postby HxPaul » Thu Dec 29, 2016 10:43 am

If you dont want to drill your headset rout the hose this way.http://scootrs.com/images/restoration/b ... dset_2.jpg
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Re: Fitting a disc brake kit

Postby gaz_powell » Thu Dec 29, 2016 11:52 am

Life is easier with a goodridge or venhill braded hose instead of the thick rubber ones often supplied.
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Re: Fitting a disc brake kit

Postby Donnie » Thu Dec 29, 2016 12:05 pm

Mel K wrote:Or whether to have a hidden master cylinder or not ?


NOT, they are generally (note i said generally) crap
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Re: Fitting a disc brake kit

Postby Donnie » Thu Dec 29, 2016 12:09 pm

CHRIS in MARGATE wrote:It's the cutting /drilling through that rare headset that makes you think. I went through the bottom but you do have to cut a deeper slot than you first plan for because the headset top overlaps. Total time was about 75 mins. Worth it.


Always make the slot in the headset top, easier to replace than the bottom should you or a future owner want to go back to standard.

HxPaul wrote:If you dont want to drill your headset rout the hose this way.http://scootrs.com/images/restoration/b ... dset_2.jpg


Love how Randall's made it look like it was his idea when it was Jason Frosts some years ago.

gaz_powell wrote:Life is easier with a goodridge or venhill braded hose instead of the thick rubber ones often supplied.


Definitely ditch the rubber hose, it's rubbish.
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Re: Fitting a disc brake kit

Postby P D: SC Chester » Thu Dec 29, 2016 1:05 pm

Cheers guys, when I bought her, she already had a you shaped bit cut out of the head set which I filled. Now I know what it was for - job done!

I also bought the Anti dive, are they as good as they claim?
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Re: Fitting a disc brake kit

Postby pharrisRB225 » Thu Dec 29, 2016 5:16 pm

Yes
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Re: Fitting a disc brake kit

Postby Storkfoot » Thu Dec 29, 2016 6:40 pm

It's a few years since I have run an external disc brake but I have run 2 ScootRS set ups in the past. On both occasions, I did not used the rubber hose supplied, I got the Venhill type replacements.

My own experience of both the external set ups I had was that they were a bit too fierce. What I mean is that they had little give, so much so that anything remotely like an emergency stop would immediately totally lock the front brake and cause it to skid.

I'm not set against external hydraulic set ups by any means but it has occurred to me that that are, IMO, a tad too fierce because:

1. The Master Cylinders are too big and pump too much brake fluid.
2. There is absolutely no "give" in the hose which there might be in a rubber hose.

Has anyone actually tried the rubber hose supplied?
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Re: Fitting a disc brake kit

Postby rossclark » Thu Dec 29, 2016 7:41 pm

You could probably also add

3. The disk is often too big for the size of the wheel.
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Re: Fitting a disc brake kit

Postby Mel K » Thu Dec 29, 2016 8:40 pm

Donnie wrote:
Mel K wrote:Or whether to have a hidden master cylinder or not ?


NOT, they are generally (note i said generally) crap

I know of four fitted that could take the Pepsi challenge against any fully hydraulic confidently . :)
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Re: Fitting a disc brake kit

Postby missing lynx » Thu Dec 29, 2016 9:13 pm

I've had a few scoot rs external disks found them very good but I wouldn't have anti dive as they seem to make the front wheel skip under heavy braking and you loose all feel at the front end when braking a good set of secondary dampers are a better bet
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Re: Fitting a disc brake kit

Postby stonerosesmod » Sat Dec 31, 2016 11:19 am

Seriously thinking of going back to a drum front end as my hydraulic brake is very fierce.Plus Ive really gone off the look of the reservoir on the headset too.
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