making the ninja go faster - Kawasaki Ninja 250R Forum
 
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post #1 of 8 (permalink) Old 04-10-2012, 07:44 PM Thread Starter
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making the ninja go faster

Any ideas of a good combination of sprockets for a 2008 ninja 250 to make its acceleration faster?
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post #2 of 8 (permalink) Old 04-10-2012, 10:46 PM
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Don't know the stock sprocket sizes for the 08+. But if you want better acceleration change your rear sprocket. I believe adding teeth to the rear gives you more acceleration, however it will also give you higher rpm's.

Personally, I like the acceleration on the 250. I've thought about getting a 15 tooth sprocket on my '07 ex250 which will lower my rpm's and make the bikes less screamy on the highway going 60-70mph. It's easier and cheaper than the rear sprockets.

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post #3 of 8 (permalink) Old 04-11-2012, 11:27 AM
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Originally Posted by slayer3041 View Post
Any ideas of a good combination of sprockets for a 2008 ninja 250 to make its acceleration faster?
Because of the lack of over HP on the Ninja 250, additional speed come with a trade off. You can make the Ninja accelerate faster from a stop but you will loose top end speed. If you want more top end speed, you will lose some low end torque. Making the Ninja accelerate faster means you will have to shift faster as well because the gears will be so close together. Your rpms will also be higher. The stock sprocket set up (14/45) tends to be a good combo without making the bike totally unbalanced. Honestly if you want to go faster, you'll need to twist the throttle more. Try launching the bike closer to 4k rpms and keep it above 6k in every gear to maximize the powerband. If that's still not enough you could try a 14/50 set up, but you may quickly find it boring for rides above 70 mph. Your rpms will be approx 1000k more than stock for any given speed.
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post #4 of 8 (permalink) Old 04-11-2012, 09:26 PM Thread Starter
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Most of my driving is under 60 mph. That's why I'm looking to kick up the acceleration. Would I need a speedo healer with new sprockets ?
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post #5 of 8 (permalink) Old 04-12-2012, 12:43 PM
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You're not going to get any break neck take off speed by changing sprockets. In other words it's not going to launch like a 600. However if you increase the rpm speed you take off (3-4k rpms) at, you'll find the Ninja pretty quick. The 250 Ninja can beat a lot of cars and trunks from 0-60 mph.

The Kawasaki Ninja 250 does not have an electronic speedometer. It is a mechanical gear driven instrument attached to the front wheel. No electronic sensors. SpeedoDRD or Speedo healers will not work with it. Changing sprockets will not have an effect on the speedo.
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post #6 of 8 (permalink) Old 04-12-2012, 02:00 PM
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agreed. If you shift at around 8,000rpms you'll blow past nearly everybody.

If you're looking for acceleration while on the move. As in, you want to go from 40-50 a lot faster and you've already shifted to 6th, just shift down to 5th and you'll get up there quicker.
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post #7 of 8 (permalink) Old 04-19-2012, 06:44 PM Thread Starter
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alright thanks guys. ive decided to keep the standard sprockets. if it is not that much of a increase, its not necessary then.
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post #8 of 8 (permalink) Old 04-26-2014, 07:29 AM
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