We Inserted the piston and spring back into the cylinder then slid the piston back to assist in trigger assembly

We inserted the spring guide

We did A B C and D first

Standard springs will fit but we were asked to fit a TITAN mainspring - which needed to be cut down

From This

TO THIS

Placing C on top of D

1962 BSA Meteor Mk 2

THE REBUILD

We measured the old spring and counted two coils into the length of the old spring. We marked the new spring where we were going to cut it

We ground the spring flat and allowed it to cool

We cut the spring to the desired length

Using a high temperature blow torch, we heated the end we had just cut

Whilst still hot, we gently tapped and compressed the end about half a coil