Not an answer to the chain question but I have two wheel sets.
Stock wheel has 14/50 gearing which is good for a dual sport ride.
Other wheel is 14/52. Same chain. Great single track gearing. Bike will almost chug in first with no throttle. 2nd and 3rd are sweet trail gears.
13' KTM 500 exc
06' Suzuki DR 650
09' Genuine Blackjack
08' KTM 300 xcw