Gearbox 'tapping sound' in neutral

Anything related to Lambrettas... ask tech questions, post helpful info, or just read and learn.
Fruitjuice
registered user
Posts: 201
Joined: Fri Jan 09, 2009 8:26 pm
Location: Ghent, Belgium
Contact:

SIL 200 engine, when pushing the scooter along while in neutral there'sa 'tapping' sound like the gear selector is touching the side of a gear.
When running he sound isn't there and will run in neutral on the stand or idling at the lights with no issues what so ever.
I've noticed this noise on several different SIL engines but never on my Serveta or Innocenti engines.
Is this merely a gearbox shimming issue? and would this account for the scooter jumping out of 4th gear under load?
Life shouldn't be a journey to the grave with the intention of arriving safely in a pretty, well preserved body, but rather to skid in broadside, in a cloud of smoke, thoroughly used up, totally worn out, loudly proclaiming: "WOW, WHAT A RIDE"
holty
registered user
Posts: 908
Joined: Wed Jul 15, 2015 11:52 pm
Main scooter: lambretta gp
Location: east yorkshire
Contact:

could the sound be the balls in the rear hub bearing all dropping down to the bottom as your pushing it along ?
a.lo.v2
registered user
Posts: 113
Joined: Sun Sep 30, 2012 2:16 pm
Main scooter: sx 200
Contact:

Fruitjuice wrote:SIL 200 engine, when pushing the scooter along while in neutral there'sa 'tapping' sound like the gear selector is touching the side of a gear.
When running he sound isn't there and will run in neutral on the stand or idling at the lights with no issues what so ever.
I've noticed this noise on several different SIL engines but never on my Serveta or Innocenti engines.
Is this merely a gearbox shimming issue? and would this account for the scooter jumping out of 4th gear under load?
i think you could be right about the selector catching the gears. Rimini have brought out a new layshaft that is supposed to cure this problem. something to do with the spring/ ball drilling i think.
Morgan
Posts: 133
Joined: Sun Mar 17, 2013 10:31 am
Main scooter: T5 Vespa Mk1
Contact:

Kick start plunger/teeth catching ?
User avatar
HxPaul
registered user
Posts: 1110
Joined: Fri Dec 06, 2013 1:58 pm
Main scooter: lambretta Li 150
Location: Halifax,Yorkshire
Contact:

Morgan wrote:Kick start plunger/teeth catching ?
The gears dont move when its in neutral.
User avatar
DigDug
registered user
Posts: 788
Joined: Wed May 02, 2012 1:00 pm
Main scooter: Lambretta
Location: Stroud
Contact:

Cable end catching on the wheel/hub or loose wheel nuts.... :?:
Did you have to do that?
User avatar
EddieStone
registered user
Posts: 435
Joined: Mon Aug 17, 2015 4:13 pm
Main scooter: Lambretta Li 150
Contact:

I had a similar noise from mine and turned out the rim was cracked. Only found it 'cos I had a flat.
Post Reply Previous topicNext topic
  • Information
  • Who is online

    Users browsing this forum: Semrush [Bot] and 13 guests