when upgrading crank is it vital to change bearings

[david14a05]

I am upgrading my crank would anyone advise me to get new bearings and what type? for a 2007 yamaha aerox 50 horizontal engine.
Thank you!

 

[Bas]

Yes, you must get new bearings. SKF C4 bearings are recommended.

 

[david14a05]

Yes, you must get new bearings. SKF C4 bearings are recommended.

what about seals ?

 

[Bas]

Those don't matter, just use new ones.