Parts Unlimited Part number: PU-T520-3 Qty. 1 2 3 4 5 6 7 8 9 10 Add to Cart 520 Drive Chain Master Link - [T520-3] Parts Unlimited - is currently on backorder. You may still purchase now though and we'll ship as soon as more become available. Parts Unlimited Standard Drive Chain Master Link - Size 520 - [T520-3] Master link description: Fit 520 chain 3 pcs. Compatible with 125cc-300cc