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I was instructed by a mechanic friend that going DOWN one tooth (from 16t to 15t) on my front sprocket would give me a little more in my cruising range (ie being able to accelerate around traffic, etc.). Everything I see is go UP a tooth or more for top end!?! I am not interested in 100+mph/160+kph cruising as that isn't where I spend the majority of my time. Also I live at high altitude (Approx 7400 feet/2270 meters) which strangles bike. Currently as I am a** deep in snow presently I cannot check out the mods I have done. KN filter, AI inj removed, Triumph off-road pipes, carb jetted for altitude already.
What I need to know is: Has anyone else done this sprocket mod? Pros? Cons? I am an ex-BMW owner so chains baffle me. Would the Sprocket Specialties #633-15 work on my ride (see it listed for 01-03 Speedies only!?!). Or another mfg who makes a 15t sprocket? I only see 16t and up listed on most parts sites?!? I don't wish to change rear sprocket too if I can help it (wife getting suspicious of overall cost so far) because then I'd probably need a chain too......too much extra $$$ (Substitute Sterling symbol or Euro symbol if you are in UK or Eurozone:D)
I am not interested in racing just more "snap" when I accelerate at cruising speed.
Thanks!
 

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Well, it sounds like dropping a tooth on your front sprocket is what you need to do. If you can't find a 15T, then go up two teeth on the rear sprocket. I think your stock rear is 43T - finding a 45T should be easy. I know a couple vendors custom make them in any color you want, too.
 
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