Parts › GREEVES CHALLENGER 24MX4 & 250 GRIFFON 70MM +50 DYKES TOP PISTON RING PART NUMBER G1387 Image 1 of 4 Image 2 of 4 Image 3 of 4 Image 4 of 4 GREEVES CHALLENGER 24MX4 & 250 GRIFFON 70MM +50 DYKES TOP PISTON RING PART NUMBER G1387 £10.00 1X OLD SHOP STOCK. PISTON RING.RINGS SHOULD ALWAYS HAVE THERE GAP CHECKED IN CYLINDER BORE Add To Cart Added! 1X OLD SHOP STOCK. PISTON RING.RINGS SHOULD ALWAYS HAVE THERE GAP CHECKED IN CYLINDER BORE