Question about sprockets - Kawasaki Ninja 250R Forum
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post #1 of 28 (permalink) Old 08-07-2012, 11:10 PM Thread Starter
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Question about sprockets

I changed my front sprocket to a 15 tooth and was looking to change the rear as well. I do a lot of highway riding but still have a good bit of hills in PA so I'm just wondering if anyone knows about the rpm range the different rear sprockets get?

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post #2 of 28 (permalink) Old 08-07-2012, 11:39 PM
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Lower in the front and higher in the back = higher RPMS.

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Originally Posted by SPL170
Just remember.."respect for the bike" is not what keeps you from crashing. You can have all the respect in the world for the bike, but when you do something accidentally and the bike reacts in a way that your skillset doesn't know how to respond to.......that's what ends you up on your head.
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For every person that came in "too hot" and ran off the track, there is somebody else who comes into that same turn, even hotter, on purpose.
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post #3 of 28 (permalink) Old 08-07-2012, 11:59 PM Thread Starter
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I'm looking to lower the rpms a little more maybe 500-1000 more, I've already put a larger front sprocket just not sure how small to got with the rear

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post #4 of 28 (permalink) Old 08-08-2012, 12:02 AM
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I'm looking to lower the rpms a little more maybe 500-1000 more, I've already put a larger front sprocket just not sure how small to got with the rear

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What's stock on the 250r? If you're only looking for a grand more 1 or 2 teeth less in the back should do it.

Quote:
Originally Posted by SPL170
Just remember.."respect for the bike" is not what keeps you from crashing. You can have all the respect in the world for the bike, but when you do something accidentally and the bike reacts in a way that your skillset doesn't know how to respond to.......that's what ends you up on your head.
Quote:
Originally Posted by Chaotic
For every person that came in "too hot" and ran off the track, there is somebody else who comes into that same turn, even hotter, on purpose.
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post #5 of 28 (permalink) Old 08-08-2012, 01:06 AM Thread Starter
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14 front and 45 rear, that's what I was thinking

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post #6 of 28 (permalink) Old 08-08-2012, 11:48 AM
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Quote:
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14 front and 45 rear, that's what I was thinking

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Ya if you went up one in the front to 15 and you're planning to go to 44 Er 43 in the back that should be exactly what you're looking for. Even better gas mileage!

Quote:
Originally Posted by SPL170
Just remember.."respect for the bike" is not what keeps you from crashing. You can have all the respect in the world for the bike, but when you do something accidentally and the bike reacts in a way that your skillset doesn't know how to respond to.......that's what ends you up on your head.
Quote:
Originally Posted by Chaotic
For every person that came in "too hot" and ran off the track, there is somebody else who comes into that same turn, even hotter, on purpose.
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post #7 of 28 (permalink) Old 08-08-2012, 02:01 PM
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43 would be a good change and still get you up hills. You really won't notice a huge change in mpg, but the rpm's will be lower and the bike won't scream as much when riding. People have told me that lowering rpm's via sprockets increases the vibrations of the bike. But a 15/43 setup is probably the ideal setup



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post #8 of 28 (permalink) Old 08-08-2012, 06:59 PM Thread Starter
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Ok thats the size i planed on ordering, so far just with the 15 front im geting a couple mpg more but i also staryed using gas stabilizer to get rid of the ethinal

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post #9 of 28 (permalink) Old 08-08-2012, 09:36 PM
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yeah you'll see a little bit of difference with your new sprocket setup, but the mpg doesn't increase as much as you would hope for. I know, I was disappointed too lol. But overall it makes for a more enjoyable ride.



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post #10 of 28 (permalink) Old 08-09-2012, 12:19 AM Thread Starter
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What sprocket setup do you run?

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