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OS 28ZX & NINJA 21JX Internal differences

OS 28ZX & NINJA 21JX Internal differences

Old 06-29-2009, 05:30 PM
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Default OS 28ZX & NINJA 21JX Internal differences

I was just wondering if anyone knows if the internals (crank, rod, piston and sleeve) from a Ninja 21JX will fit in the OS 28ZX crankcase. I know the crankcases are the same but I don't know about the bearings. I also wanted to use a Ninja head if it will fit.
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Old 06-29-2009, 05:35 PM
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The cases are NOT the same. The design is simmilar, but the bores are VERY different. The Ninja case is bored for the .21 size sleeve. XZ case for the .28 sleeve.
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