2007 m1000 clutch weights revelstoke

few questions about weights. A few buddies and I are heading to Revelstoke from washington on the 20th of this month and I'm wondering if I need to change my clutch weights? It's an 2007 m1000 with a three post primary. If I do need to change weights what weight do I go with and where should I buy them. oh and we normally ride 3000'-6000'

Also will my buddies need to change there's
2010- M8 le
2007 M8
2005 M7

thanks for the help