gearing

[Millietant]

How the fuck is staying in 5th gear instead of 6th going to give the increased acceleration through the gears that this mod gives.

Dead simple engineering and mathematics, all it means you are doing is changing the ratio of 6th gear closer to that of 5th gear, the ratio of 5th closer to that of 4th, 4th to 3rd, 3rd to 2nd, and 2nd closer to 1st. 1st gear becomes lower, so it makes the bike easier to get off the line - but you the have to change up to 2nd sooner.


Changing the gearing like this only increases the rpm at any given road speed through each gear. Effectively, you're just revving the engine higher, putting bike nearer its peak torque & power rpm. You can replicate this simply by hanging onto a lower gear a bit longer.


It's all just about ratio's and the proof is in Steve Pring' tables earlier in this thread. For example, at 50 mph in 3rd gear on stock gearing, the bike is revving at  4,500 rpm AND at 50 mph in 4th gear on the 15/47 modified gearing, the bike is revving at 4,500 rpm - exactly the same.  Hence staying in 3rd gear at 50 mph on the standard bike will have EXACTLY the same effect as lowering the gearing when using 4th gear at the same speed - as I said at the start, dead simple engineering and mathematics, so, save your money and just use one gear lower for any given road speed to keep your revs up (if you want a more responsive bike).