Bonneville America Forums Forums Technical Forums Performance Mods performance mods

With these mods in place ,even if I decide to go from a larger sprocket say a 17/42 or 18/42 I'll get more torque then at the line but decrease as I get close to a ton.(I'd always opt for the performance off the line because I don't run a ton every other day. With you guys mods in place has anyone of you watched the odometer vs. MPG ? Thanks again , and we'll keep a light on fer'ya' P.S Thanks for the motorcycle carb 101 theory pages I'm going to print that for future reference. P.S. Is that why the america has a larger maximum power with the 17T sprocket but a lower Torque value than the speedmaster? I've seen that all the gear ratios are the same including the primary drive,the only difference is the final drive 17/42 which gives it a 6 HP jump in max. power at 900 more RPM's than the speedmaster.Speedmasters Max. torque 68NM or 50.156 ft-lb at3500 RPM while the america Max torque is 60NM or 44.256 ft-lb. (keep in mind these are wihout mods) So the final drive ratio on the speedmaster is 2.63:1 to americas 2.47:1 Which means Speedy's 16T sprocket makes 2.63 revs=1 whole turn on 42T(rear) sprocket Whereas the America 17T sprocket makes 2.47 revs= 1 whole turn on 42T(rear) sprocket. Just tring to see where my gains are on the speedy.