2LSF GOLD CHAIN 420 78 LINK HONDA XR50 CRF50 Z50 STOCK REPLACEMENT CHAIN Suzuki JR50 JR 50 1978-2000 CH09 420 GOLD CHAIN HONDA 78 links New 420-78 non o-ring chain with master link for Suzuki JR50, 1978-2006 models. Thickness: 12.88mm/ 0.5" New 420-78 non o-ring chain with master link for HONDA XR50, CRF50, Z50 models.