Gearbox Rebuild
- djh66
- registered user
- Posts: 369
- Joined: Sun Jan 31, 2010 12:19 pm
- Main scooter: 150 special
- Location: Bedford UK
- Contact:
I'm rebuilding my recently aquired Italian imported 1965 150 special. I striped the engine and gearbox to inspect and/ or replace any components deemed necesary.. The gearbox seemed ok so I'm rebuilding it with the existing components following stickys manual, but my first gear seems to sit too deep, and the large shim floats about! I tightened the layshaft up tight using the hub / nut method. I did not notice if it was like this when I took it apart, anyone shed any light??
Bring Me Sunshine COYH
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- registered user
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- Joined: Thu Jun 24, 2010 7:48 pm
- Main scooter: Lambretta GP RB252
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if you have put the 4th gear in the right way? , and torqued down the rear hub/nut correctly then all you will need to do is fit correct shims to achive the correct clearance . changing some of the gearbox parts can alter the clearance so its a good idea to keep a set of various shims.
Fairspares Lambretta workshop.
- djh66
- registered user
- Posts: 369
- Joined: Sun Jan 31, 2010 12:19 pm
- Main scooter: 150 special
- Location: Bedford UK
- Contact:
fantastic! Your first 11 words made me think!fairspares wrote:if you have put the 4th gear in the right way? , and torqued down the rear hub/nut correctly then all you will need to do is fit correct shims to achive the correct clearance . changing some of the gearbox parts can alter the clearance so its a good idea to keep a set of various shims.
I believe, after reading the book again, I've got the fourth gear the wrong way round!!!!!!

Bring Me Sunshine COYH
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- registered user
- Posts: 361
- Joined: Thu Jun 24, 2010 7:48 pm
- Main scooter: Lambretta GP RB252
- Contact:
glad to hear you sorted , it can be a bit confusing which way the 4th gear goes.
Fairspares Lambretta workshop.
- paulmgreen
- registered user
- Posts: 517
- Joined: Sun Jan 04, 2009 4:34 pm
- Main scooter: Lambretta Group 4 Race 200
- Location: Grantham
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nice one... all sorted...
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