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Fitting Black Edition BGM rear shock

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

Fitting Black Edition BGM rear shock

Postby Paulnobodyimportant » Mon Sep 26, 2016 6:14 pm

Instructions are a bit confusing. On the MB site we have the following statement. But using these set of instructions, I have to almost wind the spring down fully, which means about 70mm of threads showing.


The C spanner is included to the delivery and the more you screw the spring preload adjustment
plate the more preload is on the spring. Setup is easy and the black rubber bump stop can be
used as an indicator for getting it right. A good starting point is achieved when the rubber
bump stop is moving approximately 15 – 20 mm on a standstill with the bike off the centre
stand and someone giving a helping hand on keeping the bike central. This setting you can use
as a basic setup to elaborate the settings further.


However, on LUCAS site, they seem to suggest that we should measure from the rear loop to the ground, unladen and wind the spring in so that the loop lifts up 10mm for a 150lbs load. This I have done and it shows about 12mm of thread wind down, see photo.

All a bit confusing, so what have others done????


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