View Full Version : 400ex bore sizes
Nettles 400ex
04-11-2012, 07:14 AM
hello im just wondering what all the bore sizes are for a 400ex. Just something i want to know.
Thanks
powerbomb400
04-11-2012, 08:08 AM
Look at Wiseco's website and it has a chart of ??mm=??cc'. Type in you are looking at Honda 400ex piston's.
Stickman400
04-11-2012, 09:06 AM
86mm=407cc
87mm=416cc
88mm=426cc
89mm=440cc
All of these are not exact though, it's gunna be a few cc's less than what I posted since the engine isn't truely a 400cc but a 397cc.
Wheelie
04-11-2012, 08:46 PM
89mm is actually a 435.
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