new top end vs crank bearing

[fourtrax400ex]

hi, im looking to put an xr cam and a wiseco 11:1 piston in my 400ex but i want to know if i need to rebuild the crank and bearing or just do the top if they seems good, is a high compression piston can create too much power on the crankshaft?? is someone have problem with this??

[400exRacerX]

You should be fine with those mods, when you need to start rebuilding the crank is when you start to go over 440cc's. this 11:1 piston is stock bore right?

[fourtrax400ex]

yes the piston is stock bore or maybe one oversize bigger if the sleeve need it. thanks for response