14t and Gas Mileage

[Lord_Bragle]

I’m getting 65 miles to the gallon on average out of my S2R, quite incredible I know, but I am following my wife around on her 125 as she learns, I rarely go over 3000 rpm as I ride along now, I do have the 14T sprocket and I couldn’t say if it improves my mileage but it sure makes tootling around town behind the wife easier.

[OT]

Changing my sprocket (15 to 14) had the overall effect of lowering the bike's speed a little at any given RPM or, conversely, bumping the rpm up a little (3-4K) at the same indicated speed.  But just a little -- it's not a major change.

So, now I can comfortably ride below 15 mph in 1st gear.  BTW, this is the only reason I changed the sprocket....I can still hit 120 mph indicated on the turnpike.

[Cucciolo]

So, now I can comfortably ride below 15 mph in 1st gear.  BTW, this is the only reason I changed the sprocket....

Me too! and it behaves so much better!

[VeryMetal]

Doesn't swapping sprocket sizes effect your speedo? I had an R6 and dropped a few teeth to improve low end pull away and just dropping a couple teeth was enough to throw my speedo way off. I know there's a bunch of little speedo healer products you can buy but I never got the chance to install one.

I usually try to cruise around between 4000 and 5000 rpms on my 02 750. Feels good, seems to be right in the middle of the powerband. Am I correct in assuming that if I fitted a 14t sprocket as opposed to a 15t it would cruise at the same speed at around 3500 as it did previously at 4000 rpms?

[vwboomer]

Doesn't swapping sprocket sizes effect your speedo? I had an R6 and dropped a few teeth to improve low end pull away and just dropping a couple teeth was enough to throw my speedo way off. I know there's a bunch of little speedo healer products you can buy but I never got the chance to install one.

No it doesn't.

[OT]

Speed on (only newer?) Monsters is measured at the rear wheel -- I believe it's a magnetic device that 'counts' the bolts on the rear sprocket as they pass by.  If correct, it would probably take a major wheel change (i.e., bolt pattern/number) to affect the speedo.