the existing flywheel (left hand thread). Fit the new stator plate centrally and
ensure the cable is clamped & clear of snagging. Do not
tighten the stator plate at this stage.
Mark off the required BTDC (before top dead centre) settings to
the left of TDC. Here for a TS1 I've marked off 16 1/2, 17, 18
& 19 degrees BTDC, plus someone had already marked off 15! I
run my TS1 at 16 1/2 to 17 degrees BTDC. A normal standard
LI is 23 degrees, whilst a GP is 21 degrees BTDC.
2.Using fine grade steel wool or emery
paper remove the varnish covering the flywheel magnets.
With the flywheel fitted the arrow on this should be lined up with the
relevant degree mark made on the flywheel housing.
the flywheel. There should be an arrow on this & a
corresponding mark on the engine casing around 12 O' clock.
When the engine was originally setup this should have been top
dead centre (TDC)
Looking through the lower flywheel window located at 5 O'clock you
will find a white line on the stator plate pickup & two lines on
the flywheel window. These need to line up exactly. In this picture the stator plate needs to be moved clockwise.
now needs to be checked & this is just one way to do
it. Remove the cylinder head & turn the flywheel until the
piston reaches it's crest. Back off slightly, then back again until
the piston is at its highest point - TDC.
Remove the flywheel again, loosen the stator plate & move
it clockwise (or counter clockwise as required) Then tighten the 3
bolts holding the stator plate, refit the flywheel, followed by the washer & tighten the
shows the piston at it's highest point or TDC.
Notice the clearance
between the piston and the top of the cylinder. This is important, more so for a tuned engine i.e. for a TS1 it should be between 1-1.1mm.
With the flywheel arrow on the relevant flywheel housing BTDC mark, the
stator plate white pickup line & the lines on the
flywheel windows should line up perfectly. Now tighten the
flywheel nut using a torque wrench & the correct flywheel
holding tool (not a screwdriver jammed in the fins!!) to 50
Remove the flywheel & fit a timing wheel to the crank. Secure
this with the flywheel nut & washer.
If you don't have a
timing wheel click
here, print it and mount to some thick cardboard.
Fit the cylinder head & a gasket if required. Tighten down the
cylinder head to
18lbs/ft for a TS1 or 23 lbs/ft for any other Lambretta series
Now go here to wire it
find your lights go dim when you brake then you may need to check
& rewire your stator plate. Here's a simple diagram
to improve the lighting.