Whats is say on the cylinder barrel - either 399cm³ or 449cm³
Ok 399cm but how do tell if it's a 400 bottom end. The guy I got it from said it was a 05 wr450f bottom end with a 400 top end. Are the even interchangeable?
don't think so - I know you can put the 426 barrel on the 400, but don't think the 450 stuff fits a 400/426 bottom end or vice versa
someone more knowledgeable will be along shortly
E start might be the easiest way to differentiate.....
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