Lister TS1 air cooled Diesel, 1 cylinder, 635cc, 1985 - on Includes valve stem seals. Equates to 657-32671 Weight of set and packing approximately 320g Pack size 220 x 280 x 40 The manufacturer recommends that the TS1 is decarbonised after 1000 hours, an exercise that will require many of the gaskets and joints contained in a top set.