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Lambretta Series 3 Hardware List

Gene Merideth

Quite a few years ago I put this list of Lambretta hardware together with sizes and types of screws, washers, bolts etc, needed to rebuild your Lambretta scooter.

Please see notes at end to understand my descriptions.

IMPORTANT NOTE: ALL Sizes are THREAD SIZE, not socket or head size.



Horncover Hardware

  1. Top = 5 x 10 Pan Head Slotted Screw (2 Required)
  2. Behind Horncast Badge = 6 x 18 Allen Head Screw + 2 6mm Conical Washers (2 Sets Required)
  3. Lower Horncast (Inside Legshield) = 5 x 20 Countersunk Oval Slotted Screw + Finishing Washer (2 Sets Required)
  4. Horncast Bottom (Under Front Fender) = 5 x 16 Hex Head Bolt + 5mm Large Diameter Conical Washer (2 Sets Required)

Horncover Grille Hardware

  1. 4 x 10 Countersunk Oval Head Slotted Screw (Oval is optional, just looks better) (2 Required)

Front Fender Hardware

  1. Bottom (under Aluminum Channel) 5 x 25 Countersunk Flat Top Slotted Screw + 5mm Nut, 5mm Conical Washer (2 Sets Required)
  2. Middle - the middle screw on the front fender goes through an endcap, so it is included there
  3. Top 5 x 20 Countersunk Oval Slotted Screw + Finishing Washer, 5mm Nut, 5mm Conical Washer (2 Sets Required)

Aluminum Channel Hardware

  1. 4 Channels, Inner and Outer
  2. Inner Channels take: 4 x 10 Pan Head Screw + 4mm Speed Nut, and 4 x 20 Pan Head Screw + 4mm Nut, 4mm Large Diameter Washer
  3. Outer Channels take 2 Sets of 4 x 10 Pan Head Screw + 4mm Speed Nut (In lieu of speed nuts, you can use plain nuts and washers)

Endcap Hardware

(8 pieces on floorboard)
  1. Rear Endcaps, 4 x 20 Countersunk Oval Slotted Screw + 4mm Nuts, 4mm Washers (4 Sets Required)
  2. Front Inner Endcaps, 4 x 25 Countersunk Oval Slotted Screw + 4 mm Nuts, 4mm Large Diameter Washers (2 Sets Required)
  3. Front Outer Endcaps, 4 x 10 Countersunk Oval Slotted Screw = Finishing Nut (2 Sets Required)

Floor Plastic Set Hardware

(all 6 Pieces)
  1. 14 x 5mm Nuts
  2. 14 x 5mm Conical Washers
  3. 10 x 5mm Speed Nuts

Bridgepiece Hardware Set

Lambretta Bridgepiece Hardware Set

 

  1. 5 x 25 Countersunk Oval Slotted Screw + 5mm Nut, 5mm Conical Washer

Please note the Round Anti-Vibration Pad between Footboard and Frame Strut, as well as the Rectangular one between the Bridgepiece and the Footboard. You don't see many Lambrettas that still have those!!!


 

 

 

 

Seat Mounting Hardware

  1. Front Seat, or Dual Seat Pivot Post: 8 x 25 Hex Head Bolt + 8mm Nut, 8mm Washer(4 Required)
  2. Front Seat also takes an 8mm Flat Metal Washer, between the seat and the frame - This is not Plastic (4 Required)
  3. Rear Seat, or Dual Sear Latch Post: 8 x 25 Hex Head Bolt + 8mm Nut, 8mm Washer (4 Required)
  4. The Rear Seat or Dual Latch Post takes a Large Diameter 8mm Plastic Washer. (4 Required)

L Bracket Hardware

(Footboard Bracket on Kickstart Lever side of scooter)

  1. 7 x 20 Hex Head Bolt + 7mm Nut, 7mm Conical Washer (2 Sets Required)

Cylinder and Fan Cover Hardware

  1. 5 x 10 Slotted Hex Head Bolt + 5mm Lock Washer (7 Required)
  2. 8 x 14 Hex Head Bolt + 8mm Conical Washer (1 Required)

Headset Hardware

Please note Li and TV/SX are different

 

Series 3 Li

  1. 5 x 40 Countersunk Oval Slotted Screw + 5mm Countersunk Internal Lock Washer (2 Sets Required)
  2. 6 x 10 Countersunk Oval Slotted Screw (for switch housing to headset) (2 Required)
  3. 4 x 10 Countersunk Oval Slotted Screw + 4mm Finishing Washer (Headlight Rim) (3 Required)
  4. 3 x 22 Countersunk Flat Slotted Screw (for switch to switch housing) (2 Required)

SX/TV/Special

  1. 5 x 40 Countersunk Oval Slotted Screw + 5mm Countersunk Internal Lock Washer (2 Sets Required)
  2. 6 x 10 Countersunk Oval Slotted Screw (for switch housing to headset) (2 Required)
  3. 3 x 20 Countersunk Oval Machine Screw (Philips Head) (Headlight Rim) (4 Required)
  4. 3 x 22 Countersunk Flat Slotted Screw (for switch to switch housing) (2 Required)

Wheel Rims

  1. 8mm Nylok Nuts + 8mm Conical Washer (Holding Wheel Rims Halves together) (4 Required per Hub)
  2. 8mm Dome Nut + 8mm Conical Washer (Holding Wheel Rim to Hub) (4 Required per Hub)

NOTES:

Special hardware for things like gas tank straps, glovebox mounting, etc are not listed.

SIZES:

I list things with the THREAD SIZE, NOT the size of the wrench, spanner, socket etc etc.
For example, a 6mm Nut or Head of a Bolt, will take a 10mm socket. This is pretty standard throughout the hardware world, though both Vespa and Lambretta used odd-sized hardware from time to time
Vespa and Lambretta used 14mm Socket Sized Wheel Rim nuts
Lambretta used a special 9mm head bolt (its a 6mm thread) to hold the cruciform selector spider
Vespa uses a lot of 9mm thread sized hardware, which is not normal (neither is 7mm actually) and is hard to find from suppliers.



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  • Saints Cycle Works on

    Thank God you put this together. I bike am building was supplied with a “kit” from another supplier and it was all thrown in a bag and most was wrong. Never would have got it sorted out in a reasonable amount of time.
    Thanks Gene.


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