Stroker for a 400ex

[SLSD400exGUY]

can anyone tell me what the biggest stroker kit for a 400ex is? also i need websites and what not too! thanks!

[400exrider99]

i think its the fst 500ex kit because of the huge difference in cc's but if its not it is a 460 kit which is a 440 piston and a stroker crank
www.fourstroketech.net

[Chris S.]

FST has a 500cc kit that is actually 490cc but can be bored to 511cc. Those are the numbers if I remember right. Duncan racing has a 465 kit that rips also which is probably what I would go with if I were to do it all over again. Sparks has the 460 I believe. I know alot of guys say displacement is everything but I will admit that sometimes when I am riding I miss the way my built 440 would rev. The stroker kits are alot of fun though.

[pit/wood]

you should buy a rev box before a stroker crank guy:D

[400exrules]

ive seen alot of places selling a 4mm stroker that puts you at 460cc

[stalefish_132]

mine is bored to 416 (87mm bore) X 74mm stroke (+4mm stroked) which puts me at 440cc's.
chad502EX built at a true 502cc EX maybe he can give some info for you.