Ok have a 2006 XR650R. Rings are blown right now so doing a full rebuild. While she's down and waiting on parts to come in I would like to respring my suspension. While I'm in there want to go ahead and do fork seals and fluilds. Main question, are there any special tools I need before I start the tear down? Second question, how do I pick which oil weight to use? Last question, how do I go about recharging (or does it need it at this point) the nitrogen in the rear shock? Thanks guys.