BSA METEOR MK1-5 Piston Seal Conversion kit
Designed & Made by me Welsh Willy is a BSA Meteor Piston seal conversion kit. This will fit MK1 - 5 BSA Meteors
The kit replaces the original factory O ring set-up with a much better sealing & performing parachute seal.
In tests I found the new seal when fitted along with the WW BSA Meteor spring service kit averaged 10.2 ftlbs using RWS Superdomes and 10.4 ftlbs with RWS Hobby’s, with the factory fitted head & O ring it was almost 8 ftlbs.
2 different types of piston fitting see pics below main photo 1 = straight through other is Keyhole
Please check that the insides of your cylinder are score free and don’t have any ovaling of the main cylinder
Very easy to fit takes all of 5 mins to install.
Piston Seal Conversion kit consists of
1 x parachute piston seal
Delrin tapered insert
Delrin Buffer washer
Tapered allen headed screw, nylock nut & rear steel washer