Sprockets position manual 371 Sprockets position manual Optimized sprockets position 551 A minimum: 1.66”/42.5 / B minimum: 3.34”/85 (steps) Sprockets Position for: 551FT - 551GT - 551GTsi - 551LBP 551 Belt width Recommended number of sprockets* 3.34”/85 1 6.69”/170 2 10.04”/255 3 13.38”/340 4 16.73”/425 5 20.08”/510 6 23.42”/595 7 26.77”/680 8 30.12”/765 9 33.46”/850 10 36.81”/935 11 40.15”/1020 12 43.50”/1105 13 46.85”/1190 14 50.19”/1275 15 53.54”/1360 16 56.89”/1445 17 60.23”/1530 18 *If more sprockets are required contact application engineering. A A B B B Width 6.69/170 M=3.34/85