@DEcosse has asked the question about the ground small black wire coming off main negative battery cable because it is from the regulator and if you are putting this bike on a charger and then riding indeed the battery could just be draining (20 minute ride with no charging and a rocket will not start again until charged) if that wire is compromised therefore will not start when hot and a jump may be required to get back home and on the charger. Do you have on a charger or will it start once it cools off, if so swap relays as the starter relay could indeed be bad once it gets hot it’s a no go. Ken sorted both these issues when I experienced the same symptoms. And I did have a bad starter relay and a bad burnt regulator negative wire but he found both.
 
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