Technical Inc. Big Bore Kit (345cc) - Kawasaki Ninja 300 Forum
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post #1 of 23 (permalink) Old 04-17-2016, 05:12 PM Thread Starter
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Talking Technical Inc. Big Bore Kit (345cc)

I know this topic has been beaten to death but I think I actually found something that might work this time!
As you know, our Ninja 300 is basically the same thing as Ninja 250 in Japan, except USA version has longer stroke.

This company called Technical Inc. happen to have a 290cc big bore kit for Ninja 250(JDM Ninja 300) for the price of 43,000 Japanese Yen

http://www.technical-inc.net/products/detail843.html

bore/stroke: 67mm x 41.2mm (JDM Ninja 250 with this kit)
bore/stroke: 62mm x 49.0mm (stock Ninja 300)

So I was thinking we could achieve bore/stroke of 67mm x 49mm, which would make it 345cc.
Do you think it's possible or would there be another problem for this big bore kit?



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post #2 of 23 (permalink) Old 04-17-2016, 06:10 PM
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I like it, let's give it a shot! There may be some clearance issues to deal with for the connecting rod, but that's an easy fix.

Dave

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post #3 of 23 (permalink) Old 04-17-2016, 06:21 PM
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Who will be the test subject?
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post #4 of 23 (permalink) Old 04-17-2016, 06:36 PM
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I would love to do this, but will there need to be any adjustments to fueling?

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post #5 of 23 (permalink) Old 04-17-2016, 07:09 PM
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Okay. Send the fliers out, we need this to be tested. gogogo
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post #6 of 23 (permalink) Old 04-17-2016, 07:50 PM
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Looks doable. My guess, with a PCV, Yoshi R77 and BMC race air filter, 47 hp on pump gas and 50 with MR12 race gas. Of course that beast won't be legal in any class so no real reason to run race gas.

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post #7 of 23 (permalink) Old 04-17-2016, 08:27 PM
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Me likey! I hope someone is in a position to try this and get back to us! I'd love to give it a crack but not financially viable for me at the moment!


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post #8 of 23 (permalink) Old 04-17-2016, 08:37 PM
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That's only 398 freedom bucks before shipping. Someone use this with Kingsley's rotary valves.

Dave


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post #9 of 23 (permalink) Old 04-17-2016, 10:02 PM
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I happen to be going to Japan on a business trip pretty soon....

Bike: 2014 Kawasaki Ninja 300 SE [5099mi]
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post #10 of 23 (permalink) Old 04-17-2016, 10:23 PM
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The compression on this is going to be pretty damn big though. May only barely work on race fuel. May even have to transition to kerosene.

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