This may help any one buying BLT 500w to 800w Tricycle Motors , Thay come with a none standed Bicycle sprocket 420 1/2" 5/16" 1/4" 0.227" which is 1/16" wider so you will need 420 chain
Torque or load is this same as bicycle chain at 810 lbs but wider roller means less wear
Bicycle and Motorcycle Chain Dimensions Guide
Chain No. Pitch Roller Diameter Roller Width Sprocket thickness
Chain No. Pitch / Roller Diameter / Roller Width Sprocket thickness
Bicycle Chain, with Derailleur 40 1/2" 5/16" 1/8" 0.110"
Bicycle Chain, without Derailleur 40 1/2" 5/16" 3/32" 0.184"
Bicycle Chain, Asian Tricycle 420 1/2" 5/16" 1/4" 0.227"
Bicycle Chain, H/D Asian Tricycle 425 1/2" 5/16" 5/16" 0.284"
Motorcycle Chain, 428 1/2" 5/16" 5/16" 0.284"
Motorcycle Chain, 520 5/8" 0.400" 1/4" 0.227"
Motorcycle Chain, 528 5/8" 0.400" 5/16" 0.284"
Motorcycle Chain, 530 5/8" 0.400" 3/8" 0.343"
Motorcycle Chain, 630 3/4" 15/32" 3/8" 0.343"
ANSI Standard Chain Dimensions
Chain No. Pitch Roller Diameter Roller Width Sprocket thickness Working Load
25 1/4" 0.130" 1/8" 0.110" 140 lbs
35 3/8" 0.200" 3/16" 0.168" 480 lbs
40 1/2" 5/16" 1/8" 0.110" 810 lbs
40 1/2" 5/16" 3/32" 0.184" 810 lbs
40 1/2" 5/16" 5/16" 0.284" 810 lbs
41 1/2" 0.306" 1/4" 0.227" 500 lbs
50 5/8" 0.400" 3/8" 0.343" 1400 lbs
60 3/4" 15/32" 1/2" 0.459" 1950 lbs
80 1" 5/8" 5/8" 0.575" 3300 lbs
