A Ninja 400!!!?? WTF!! O___O - Page 2 - Kawasaki Ninja 300 Forum
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post #11 of 16 (permalink) Old 07-17-2017, 04:46 PM
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Maybe this thread should merge with that thread:
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post #12 of 16 (permalink) Old 07-18-2017, 04:06 AM Thread Starter
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@Timpo and @1uglybastard What does being "sleeved" mean for motos? I'm not familiar with the term O.o
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post #13 of 16 (permalink) Old 07-18-2017, 09:34 AM
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Originally Posted by ninjarider189 View Post
@Timpo and @1uglybastard What does being "sleeved" mean for motos? I'm not familiar with the term O.o
If you take apart a motor and add a "sleeve" inside the cylinder, you decrease the cylinder internal diameter and therefore displacement. The sleeve will look basically like a section of pipe that you press into the cylinder. You also need to install a smaller diameter piston to match.
If you know what a "bored out" engine is (increasing cylinder diameter to increase displacement), sleeving is the opposite.
The most common use I can think of is if you already have designed an engine (for example the Ninja 650 engine) and then for some reason need to produce a lower output bike, maybe licensing regs or other restrictions. It's a whole lot cheaper to sleeve an existing design than to start a new one from scratch.
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post #14 of 16 (permalink) Old 07-19-2017, 09:38 AM
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I'm gonna sit on one whenever they come out. If it feels like a 650 in weight then Kawasaki will have failed. One of the greatest things that the 300 has to offer is how nimble it is. an engine built to 400cc specs would add some nice oomph and, relatively, only a little more of weight.
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post #15 of 16 (permalink) Old 07-19-2017, 05:54 PM
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This 400 should be coming out soon. The 2018 Kawasaki motocross bikes have already been shown to the press.
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post #16 of 16 (permalink) Old 07-22-2017, 03:30 AM
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Originally Posted by ninjarider189 View Post
@Timpo and @1uglybastard What does being "sleeved" mean for motos? I'm not familiar with the term O.o
sleeved down means when you put thicker cylinder sleeve to fit small diameter pison to lower the displacement.

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