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post #1 of 10 Old 09-29-2008, 08:50 PM Thread Starter
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question about gearing

ok i know most of you guys are really smart so here is my question.. i have been curious why i havent shown a increase in milage since installing a 17t front sprocket.. with the larger front sprocket i would in fact travel further than the odometer read when i had the 16 tooth front.. right?? if so what would be the percentage assuming the odometer was correct with the 16.. now i have a 17 i still show about 130 miles when the gas light comes on but did i drive further than 130??



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post #2 of 10 Old 09-29-2008, 09:55 PM
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The gearing change from 16 to 17 is different by about 6.2%

All assuming the ODO is correct at 16/43, 130 miles on the ODO at 17/43 is actually 138 miles.

If you drive with stock gearing from a starting point until the odo turns 130 miles, stop on the side of the road & change to 17/43, reset the trip, turn around & go back to where you started from, the odo would read 121.9 miles.

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post #3 of 10 Old 09-29-2008, 11:33 PM
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why are you wasting your time with the 17t sprocket? It's all about the 15t sprocket. I was riding with a friend on his 919 16/43t setup and me with a 15/45t setup and we both filed up at the same time and after about 150 miles of out trip we filled up again and I used .159 gallons less than him. It isn't about the sprocket as much as it is about being smooth.

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post #4 of 10 Old 09-30-2008, 06:56 AM
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assuming your old odometer reading was correct, you could take your mileage with the 17 tooth sprocket and multiply by 17 then divide by 16 to get the actual mileage.

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post #5 of 10 Old 09-30-2008, 07:12 AM Thread Starter
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why are you wasting your time with the 17t sprocket?



cause i drive interstate 99% of the time and it buzzes like a mother with a 15t at the normal 80-100 cruising speed i drive...



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post #6 of 10 Old 09-30-2008, 07:13 AM Thread Starter
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Quote:
Originally Posted by Bryce919er View Post
The gearing change from 16 to 17 is different by about 6.2%

All assuming the ODO is correct at 16/43, 130 miles on the ODO at 17/43 is actually 138 miles.

If you drive with stock gearing from a starting point until the odo turns 130 miles, stop on the side of the road & change to 17/43, reset the trip, turn around & go back to where you started from, the odo would read 121.9 miles.

thank you i knew someone would know the proper % ... appreciate the info



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post #7 of 10 Old 09-30-2008, 06:59 PM
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Another thought...With my 17 frt I noticed that it took a bit more twist/gas to get the same results as the 16 did,so I was using more gas/throttle to get the 919 moving,to get around traffic.pretty much anywhere where I was not cruising.
However it killed the slight vibe at 65-70 and smoothed first gear lunge.I use 17/44 (+1 front and rear) with a 520 chain works perfect for Me.

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post #8 of 10 Old 10-01-2008, 03:40 AM
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Quote:
Originally Posted by zookmor View Post
why are you wasting your time with the 17t sprocket? It's all about the 15t sprocket. I was riding with a friend on his 919 16/43t setup and me with a 15/45t setup and we both filed up at the same time and after about 150 miles of out trip we filled up again and I used .159 gallons less than him. It isn't about the sprocket as much as it is about being smooth.
+1 I'm running 16/45 more fun. I bought it to have fun not fuel econ.

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post #9 of 10 Old 10-01-2008, 05:31 AM
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+1 Riquefield919





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post #10 of 10 Old 10-01-2008, 08:32 AM Thread Starter
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Quote:
Originally Posted by riquefied919 View Post
+1 I'm running 16/45 more fun. I bought it to have fun not fuel econ.
i have stock rear 17t front.. its fun as hell.. i was just curious about the percentage the sprocket changed things.. i check milage every tank not because i am worried about it but because its something i allways have done.. i ride the living "poop" out of my bike .. i beat it like it owes me money.. i guess the questions i ask are the same reason i learn to speak other launguages.. i just wanna know ..lol



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