If I recall, you bought a Gen II bike, which has an upgraded / improved counter balancer idler shaft adjustment lever [doohickey]. The spring that tensions the balancer lever has been found to be weak or not working as designed, and common advice is to replace the spring with an after market spring, available from a number of sources. The stock "doohickey" hasn't had reports of failure, and little convincing evidence supports replacing it.
As far as tools, check this post:
There isn't any magic to these tools. A truck wheel stud and a bent up Chinese wrench, all total sold for under 12 bucks, and some help from someone with a torch and a welder, and you will have a set of doohickey tools. Shipping on those tools alone is about that much. An iron worker that will loan you an 1 1/4 spud wrench will cover the wrench.
Then all you need is a 22mm x 1.5 right hand thread bolt. The truck wheel stud I recommended is rated to be torqued tighter than most mortal humans can manage, minimizing the chance of stripping out the rotor. It will cost a dozen dollars to get loaner tools mailed to you, and another dozen dollars to send them on. The other things you will need to beg, borrow or steal are torque wrenches. And buy a new rotor bolt. They are designed to be a "use once item". When torquing the rotor bolt, it stretches. By design. Using it again hinges on how lucky you feel. I've re-used rotor bolts, I just don't torque them to spec. I couldn't in good conscience recommend anyone practice either the re-used bolt or the lower torque setting. YMMV.