Lambretta Rear Brake Adjuster

FAQ tech questions, please check if the answer to your question is in here before posting elsewhere.
MightyGem
registered user
Posts: 39
Joined: Mon Jul 10, 2017 9:27 pm
Main scooter: Lambretta
Contact:

Wed Dec 19, 2018 12:19 pm

What's the spring for? I don't have one on mine.
Image

cgt75b
registered user
Posts: 787
Joined: Thu Sep 22, 2011 8:05 pm
Main scooter: lambretta
Contact:

Thu Dec 20, 2018 8:30 pm

In a word tension, it wouldn't be that effective without it.

If ya need one gis a shout.

Regards cgt75b.

MightyGem
registered user
Posts: 39
Joined: Mon Jul 10, 2017 9:27 pm
Main scooter: Lambretta
Contact:

Thu Dec 20, 2018 9:26 pm

In a word tension, it wouldn't be that effective without it
Bit more of an explanation please.

Does it help the brake shoes to release after braking? About every 5-600 miles or so, the rear brake starts to bind. I remove the hub, clean out all the dust, put a bit of grease on the cam, and all is fine; for the next 5-600 miles.

Would the spring prevent that?

Scooterdude
registered user
Posts: 783
Joined: Sat May 28, 2016 4:51 pm
Main scooter: Lambretta LI 125 S3
Location: Skaville
Contact:

Thu Dec 20, 2018 10:26 pm

The spring on the adjuster serves no other purpose than to put tension against the cam of the brass knurled adjusting nut to keep it in place and stop it unscrewing and falling off.

B-Race Tuning
registered user
Posts: 264
Joined: Sat Dec 29, 2012 5:07 pm
ebay user ID: 775063
Main scooter: Lambro, GP.
Contact:

Thu Dec 20, 2018 10:27 pm

ALL it does is stop the knurled knob un-adjusting by keeping the barrell part (that sits in the arm) pushing under pressure against the curved recess in the adjuster (knurled knob). In theory (and someone must have practical experience of it), without it, as you release the brake the adjuster could un-wind, de-adjusting the brakes. The designers must have deemed/ experienced that the brake shoe spring wasn't providing sufficient pressure. If you don't have one, and enough thread, remove the knurled knob and use two 6mm nuts (one nyloc) and adjust then lock the two nuts against each other. Save knurled adjuster for when you get a spring.

B-Race Tuning
registered user
Posts: 264
Joined: Sat Dec 29, 2012 5:07 pm
ebay user ID: 775063
Main scooter: Lambro, GP.
Contact:

Thu Dec 20, 2018 10:28 pm

Boom, Dude ;-)

Scooterdude
registered user
Posts: 783
Joined: Sat May 28, 2016 4:51 pm
Main scooter: Lambretta LI 125 S3
Location: Skaville
Contact:

Thu Dec 20, 2018 11:35 pm

B-Race Tuning wrote:
Thu Dec 20, 2018 10:28 pm
Boom, Dude ;-)
:lol:

MightyGem
registered user
Posts: 39
Joined: Mon Jul 10, 2017 9:27 pm
Main scooter: Lambretta
Contact:

Fri Dec 21, 2018 11:33 pm

OK, thanks for all that, guys.

cgt75b
registered user
Posts: 787
Joined: Thu Sep 22, 2011 8:05 pm
Main scooter: lambretta
Contact:

Sat Dec 22, 2018 7:58 am

Lambretta rear drum brakes are not the greatest at the best of times. I would say use everything correctly with all components giving you half a chance of an effective brake including the spring.
I may add also the length of the rear outer brake cable is critical, if this is just too short more often this will give issues.

The very best of luck in your quest

Ride safe Merry Christmas.

Cgt75b.

hat
registered user
Posts: 49
Joined: Fri Jul 05, 2013 7:19 pm
ebay user ID: therealhat
Main scooter: vespa sprint/gt
Contact:

Sat Dec 22, 2018 4:38 pm

I’d switch to the cable with the built in threaded section and do away with this adjuster. One less thing to worry about

Post Reply Previous topicNext topic
  • Information
  • Who is online

    Users browsing this forum: No registered users and 1 guest