Question on gas/octane rating - Kawasaki Ninja 250R Forum
 
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post #1 of 5 (permalink) Old 05-08-2011, 07:47 PM Thread Starter
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Question on gas/octane rating

My manual calls for an octane rating of 87.
Does it do it any good to put in gas of higher ratings?

I know what the ratings mean but I don't know their significance on this motorcycle. What do you guys think? I've been putting in 89 and 91 lately because my friend suggested but like usual I have questions.
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post #2 of 5 (permalink) Old 05-17-2011, 08:57 PM
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Yea this is my first bike too and I put supreme in it. Most people might tell u the they use this an that but I will tell u this u use lower gas and it will cause more carbonization in the carb and stuff just like a car. Most people don't know that unless they work on their cars themselves but despite what all say I use supreme
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post #3 of 5 (permalink) Old 05-19-2011, 08:44 PM
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Quote:
Originally Posted by oblivion007 View Post
My manual calls for an octane rating of 87.
Does it do it any good to put in gas of higher ratings?

I know what the ratings mean but I don't know their significance on this motorcycle. What do you guys think? I've been putting in 89 and 91 lately because my friend suggested but like usual I have questions.
The difference is the resistance to pre-ignition. The compression ratio in the 250r is designed for 87 octane. Using a higher octane changes the burn rate that the engine was designed for. I trust the engineers at Kawasaki know what octane is best for our engines.

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post #4 of 5 (permalink) Old 05-20-2011, 09:08 PM Thread Starter
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Are you implying that octane for our motorcycles is a thing where within a range is the best, not necessarily the higher the better?
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post #5 of 5 (permalink) Old 05-21-2011, 07:38 PM
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Using higher octane changes the combustion characteristics and lowers potential.

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