Rear sprocket Honda XL70 SL70 KX60 KDX80 7531A my sku 7531A

Brand new unused OEM NOS sprocket Heavy Duty

AI says for fitment

A classic motorcycle that would run a combination of a 420 chain and a 44-tooth rear sprocket is likely a vintage small-displacement Japanese bike or a classic 50cc-80cc dirt bike. [1, 2, 3]

Because 420 chains are lightweight and designed for lower horsepower (typically under 15 hp), they were—and still are—commonly used on bikes like the: [1, 2, 3]