Sprocket - Kawasaki Ninja 250R Forum
 
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post #1 of 10 (permalink) Old 06-16-2012, 03:17 PM Thread Starter
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Sprocket

I know there are other sprocket threads but I have a few other questions. I just bought a new 2012 and like everyone else notice the high rpms. I read that a 15 would help. 1. Do I need to buy a new chain? 2. Do I need a new rear sprocket to combine? 3. Anyone give me a link to purchase what I would need at a reasonable price? Thanks

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post #2 of 10 (permalink) Old 06-16-2012, 04:12 PM
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15 tooth front sprocket
P/N# is JTF 516.15T.
Motorcycle Superstore has it. http://www.motorcycle-superstore.com...-Sprocket.aspx

No new chain needed. If you desire even lower rpms, reduce the sprocket size on the rear to 42 or 43.

Last edited by DaBlue1; 06-16-2012 at 04:14 PM.
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post #3 of 10 (permalink) Old 06-16-2012, 06:06 PM Thread Starter
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Is ne mod needed with just a new front sprocket? If I reduce the rear?

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post #4 of 10 (permalink) Old 06-17-2012, 08:34 AM
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Is ne mod needed with just a new front sprocket? If I reduce the rear?

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No mods are needed for a 15th sprocket. You can use the stock chain even if you reduce the rear sprocket down to a 42 tooth.
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post #5 of 10 (permalink) Old 06-17-2012, 06:18 PM Thread Starter
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Doesn't affect the warranty does it? Should I wait til break in period is over or break it in with new sprocket setup

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post #6 of 10 (permalink) Old 06-18-2012, 03:32 AM
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Doesn't affect the warranty does it? Should I wait til break in period is over or break it in with new sprocket setup
No it will not. If you don't have the right tools or help to do it yourself, let the dealer do it for you. The sprocket nut can be a pain to get off initially.
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post #7 of 10 (permalink) Old 06-18-2012, 08:31 AM
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I changed the front sprocket myself about a week ago. Definitely recommended. I have an '07, but I'd imagine that it's somewhat the same process. For me, the hardest part was getting the sprocket cover off. The previous owner had never cleaned it and "gunk" had built up like crazy and basically glued the cover on. That took me 30 minutes to an hour to get that off. Once I got it off, it only took about 20-30 minutes to replace the sprocket. It wasn't too hard at all. I followed the step-by-step at ninja250.org, but I think I could've figured it out.

You also have to loosen and push forward to the rear wheel to loosen the chain enough to get the old sprocket off and put the new one on.



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post #8 of 10 (permalink) Old 06-20-2012, 04:41 PM Thread Starter
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What would b an ideal sprocket for highway use?

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post #9 of 10 (permalink) Old 06-20-2012, 06:13 PM Thread Starter
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Best rear sprocket for highway

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post #10 of 10 (permalink) Old 06-20-2012, 08:52 PM
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depends on where you'll be doing your riding. If you'll be riding over flat areas with tiny to no hills in sight, then you could go all the way from the stock 45 tooth rear to a 41 tooth. I'd say 15-43 would be a good combo for anybody though.



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