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Dirt Bike Brands - Other
2001 426 head
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[QUOTE="Rich Rohrich, post: 716594, member: 16241"] My choice of words was poor and made the whole thing far too confusing. :eek: Wiseco only makes 92mm & 94mm pistons for the stock 400 rod. If you go to the 426 rod you have to go to at least a 95 mm piston (either OEM or aftermarket). You can't bore and replate a YZF400 barrel to 95mm (94mm is the limit) so a 426 barrel is also required with the 426 rod. I haven't found any piston company building pistons for the 426 rod smaller than 95mm. The 94mm setup works really well in the old 400s but if you are going to run at high rpm you have to make sure you have a fresh rod in the bike because the 94mm piston is much heavier than stock and will stress the rod a lot harder. If you have to rebuild the crank anyway you might as well just buy a 426 rod and barrel and do it right. ;) [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
2001 426 head
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