2001 Honda rebuild questions

So I need to rebuild my 400ex (long story short Pistons and heads are completely damaged) and decided that if I’m going to spend the money and time to do it might as well bore it out. I decided to go with the 426cc seemed best for the type of riding I’m going to do. Any help or suggestions on what else is recommended or needed if I’m going to bore out? For ex. Do I need to get a better crank or clutch?I’m going to get the hd studs just to be on the safe side. Thanks for any help

2001 Honda rebuild questions

So I need to rebuild my 400ex (long story short Pistons and heads are completely damaged) and decided that if I’m going to spend the money and time to do it might as well bore it out. I decided to go with the 426cc seemed best for the type of riding I’m going to do. Any help or suggestions on what else is recommended or needed if I’m going to bore out? For ex. Do I need to get a better crank or clutch?I’m going to get the hd studs just to be on the safe side. Thanks for any help