400ex bore

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07-10-2013, 11:35 PM

savage5480

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400ex bore

I got a 400ex from a guy and he said it was bored 26 over and that it would be a 426ex. Is this true ? I thought you had to bore .130 for it to be consiered a 426 ex.

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07-12-2013, 10:39 PM

savage5480

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Quote:

Originally Posted by savage5480

I got a 400ex from a guy and he said it was bored 26 over and that it would be a 426ex. Is this true ? I thought you had to bore .130 for it to be consiered a 426 ex.

It was bored 86 mm or .040 402ex

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07-13-2013, 09:36 AM

TLC

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Not sure if this is right . (Bad a math) LOL
Stock is 85mm bore x 75mm stroke= 397.2 cc
So you would need a 88mm bore to be a 425.7 cc.
According to this site. Engine Cubic Inch/CC Displacement Calculator

86mm bore would be a 406.6 cc
Unless the guy changed the stroke as well.

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