I want to change my gearing: Difference between revisions

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15/44 Running a smaller rear reduces rpm at a given speed.

15/42 Reduces rpm even further.

15/41 For flatlanders only, although you can always kick it down into fifth if you have to.

[http://www.dropbears.com/u/utilities/sprocket.htm Gear ratio Chart] for most motorcycle sprocket ratios.

====Opinions on some gearing combinations====

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:When riding single I only felt the need to leave 6th if I was on a steep incline and traveling at less than 50 mph. When taking one of my offspring for a ride, 5th is sometimes needed to maintain highway speeds if heading into a stiff headwind or going up an incline. In 4th the bike will accelerate smartly up steep inclines. Just keep in mind that close ratio transmissions are meant to be shifted.

'''Anything/39'''

~~'''Some gear configurations and their respective final drive ratios~~:'''

*In short: You don't need a 39T; consider a 41 as the smallest option.

~~13/47 = .27660 ~~

~~13/46 = .28261 ~~

~~13/45 = .28889 ~~

~~13/42 = .30952 ~~

~~14/42 = .33333 ~~

~~14/45 = .31111 ~~

~~14/46 = .30435 ~~

~~14/47 = .29787 ~~

~~15/42 = .35714 ~~

~~15/45 = .33333 ~~

~~15/46 = .32608 ~~

~~15/47 =~~ .~~31915~~

If you ~~want~~ to do the ~~math yourself, [http://www.motorcycleanchor.com/motorcycle/how_to/mc_sprocketmath.html clicky]~~.

:I had the 39 tooth rear on for a while and enjoyed "seventh gear" and 8000 rpm freeway cruising. However, this came at the expense of a serious lack of torque from a dead stop. If you lane split through traffic, then end up at a red light, when the light turns green you might find that the cars you just passed can make up all that ground while you're trying to get moving. It's both unsafe and humiliating at the same time.

~~[http~~:/~~/www~~.~~dropbears~~.~~com~~/u/~~utilities/sprocket.htm Chart] for most motorcycle sprocket ratios~~.

:Another drawback is that if you run 14/39 you'll run out of chain adjustment - the rear wheel is as far back as it can go and there is still a lot of chain slack. Installing the bigger 15T front to reduce the chain slack will make the gear ratio even taller. And my gas mileage did not go up significantly when on a 15/39 combo compare to the 15/45.

@@ Line 35: / Line 35: @@
 /44 Running a smaller rear reduces rpm at a given speed.<br>
 /42 Reduces rpm even further.<br>
 /41 For flatlanders only, although you can always kick it down into fifth if you have to.
+[http://www.dropbears.com/u/utilities/sprocket.htm Gear ratio Chart] for most motorcycle sprocket ratios.
 ====Opinions on some gearing combinations====
@@ Line 63: / Line 65: @@
 :When riding single I only felt the need to leave 6th if I was on a steep incline and traveling at less than 50 mph.  When taking one of my offspring for a ride, 5th is sometimes needed to maintain highway speeds if heading into a stiff headwind or going up an incline.  In 4th the bike will accelerate smartly up steep inclines. Just keep in mind that close ratio transmissions are meant to be shifted.
+'''Anything/39'''
-'''Some gear configurations and their respective final drive ratios:'''
+*In short: You don't need a 39T; consider a 41 as the smallest option.
-/47 = .27660<br>
-/46 = .28261<br>
-/45 = .28889<br>
-/42 = .30952<br>
-/42 = .33333<br>
-/45 = .31111<br>
-/46 = .30435<br>
-/47 = .29787<br>
-/42 = .35714<br>
-/45 = .33333<br>
-/46 = .32608<br>
-/47 = .31915
-If you want to do the math yourself, [http://www.motorcycleanchor.com/motorcycle/how_to/mc_sprocketmath.html clicky].
+:I had the 39 tooth rear on for a while and enjoyed "seventh gear" and 8000 rpm freeway cruising. However, this came at the expense of a serious lack of torque from a dead stop. If you lane split through traffic, then end up at a red light, when the light turns green you might find that the cars you just passed can make up all that ground while you're trying to get moving. It's both unsafe and humiliating at the same time.
-[http://www.dropbears.com/u/utilities/sprocket.htm Chart] for most motorcycle sprocket ratios.
+:Another drawback is that if you run 14/39 you'll run out of chain adjustment - the rear wheel is as far back as it can go and there is still a lot of chain slack. Installing the bigger 15T front to reduce the chain slack will make the gear ratio even taller. And my gas mileage did not go up significantly when on a 15/39 combo compare to the 15/45.