I'm thinking about putting a new cam in the XR. Anyone have any ideas on which one/types are best? Don't want to go too crazy, as I plan on keeping it on 91 octane. Eventually, it'll get punched out to 628, so I'd like to keep it compatible with that. It already is jetted, snorkel removed, FMF pipe, and UNI air filter. Also, has anyone used the header wrap tape and gotten good results?