On my opinion if you ok to pay 22000$ for used bike it’s no point to save 1500$ on new bike with warranty and New! But if you find on privet party sale from the guy and got nice deal 17.5$k-18k$ plus another 600$ in registration fee because I bought with bad engine
and all around 18.3$! 24-18=6000$ it’s a lot off money saved for parts! Only my opinion, still have yellow light for yearly service on dash in next spring will change again oil and will resetting it(maybe) did oil change myself no problemo with instruction from owner manual took me a 1 hour to do slowly and did not brake nothing! Oil 15w50 can be found online but oil filter need to purchase from dealer! Good luck in decision! It’s my experience and my point but it’s your life and money!! About cooper washer from left side under intake is true and I fix it my self for 15$ I have thread you can read! Take out bolt on 12mm throw o way copper washer spray all good with brake cleaner put Hondabond HT under the bolt head blue lack and tight it down and live bike on 24 hours to cure and you done! No need to take bike on parts and pay stupid money for the labor on dealer