MPG sproket??? - Kawasaki Versys Forum
 
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post #1 of 11 (permalink) Old 10-07-2011, 08:00 AM Thread Starter
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MPG sproket???

good morning,

i did a search and maybe i missed a link....

best sproket for improved gas milage?? combo?? etc..(09 er5-n, 5800 mi.)

i do get better milage with NON ETHANOL gas... no flames please...

pura vida,
FREE TEXAS,
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post #2 of 11 (permalink) Old 10-07-2011, 08:12 AM
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The 43 tooth rear works well for cruising/economy as it lowers highway revs some. But the fun factor is < .

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post #3 of 11 (permalink) Old 10-07-2011, 08:45 AM
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Originally Posted by bluebonnet2 View Post
(09 er5-n, 5800 mi.)
You mean an ER6-N with original 15/46 final drive? 15/44 is a decent compromise for reduced rpm at cruising speeds, but with some loss in acceleration.
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post #4 of 11 (permalink) Old 10-07-2011, 12:20 PM
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I find no difference in mpg if I ride around in 5th or 6th gear, so I personally don't think gearing the bike taller will help with fuel mileage.

Getting 47 to 49.8 mpg tank after tank. I have never seen 50 mpg since I bought the bike new no matter how I drive it.

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post #5 of 11 (permalink) Old 10-07-2011, 08:45 PM
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I went the route of a larger front sprocket (16 I think). I definitely get better gas mileage. I almost always get between 55 and 57 MPG (clearly I'm not the most aggressive driver around). Plus it fixed the speedometer error. The speedo is right on with the change. Of course, that means my odometer is off now by about 7%.

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post #6 of 11 (permalink) Old 10-07-2011, 09:21 PM
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I don't think gearing will make any difference in fuel mileage. Taller gearing will keep the revs a bit lower but you will need a tad more throttle to accelerate and hold a cruise.
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post #7 of 11 (permalink) Old 10-09-2011, 11:43 AM
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Originally Posted by David RSparky3 View Post
I find no difference in mpg if I ride around in 5th or 6th gear, so I personally don't think gearing the bike taller will help with fuel mileage.
David
I agree, I went a tooth smaller on the front and my mileage is still right at 56 to 60 mpg.

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Last edited by gti20vturbo; 10-09-2011 at 11:45 AM.
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post #8 of 11 (permalink) Old 10-09-2011, 07:24 PM
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Keep in mind that changing sprocket size will change the indicated MPG because the odometer readings will change relative to actual miles traveled. For instance, I changed from a 46 rear to a 43. If my MPG after the change calculates as 50, it is really about 53.5, because the odometer is turning 7% less than before for the same number of actual miles. As I understand it, the odometer is relatively accurate with original gearing; I have found my odometer now to be approximately 7% short of actual mileage. Surprisingly, now my speedometer is indicating a more correct speed.

This makes it even more difficult to determine how sprocket sizes affect MPG. I prefer the more accurate speedo, the lower RPM at actual speed, and broader range of speed in each gear which is the result of lowering the overall ratio. I suspect that all things being equal, my MPG has probably improved. But as I said, itís hard to prove.

The biggest thing that affects MPG is your right hand.

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post #9 of 11 (permalink) Old 10-09-2011, 09:14 PM
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This makes it even more difficult to determine how sprocket sizes affect MPG. I prefer the more accurate speedo, the lower RPM at actual speed, and broader range of speed in each gear which is the result of lowering the overall ratio. I suspect that all things being equal, my MPG has probably improved. But as I said, itís hard to prove.

The biggest thing that affects MPG is your right hand.
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post #10 of 11 (permalink) Old 10-11-2011, 08:53 PM
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I went the route of a larger front sprocket (16 I think). I definitely get better gas mileage. I almost always get between 55 and 57 MPG (clearly I'm not the most aggressive driver around). Plus it fixed the speedometer error. The speedo is right on with the change. Of course, that means my odometer is off now by about 7%.
Ditto, the only thing I use the odometer for is the trip meter and clock, time when I said I was planning on being home r and how much later it actually is. The trip meter I use A for approx distance of the ride and trip B for lubing the chain, aim for every 500 KM to lube. Once lubed I reset.I use my GPS to calculate fuel mileage. I am overdue to check vacuum synchronization, one of my winter projects.
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post #11 of 11 (permalink) Old 10-11-2011, 09:05 PM
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I use my GPS to calculate MPG.

ST1300, Versys, SV650S
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