I just purchased an evo 150 for my stepdaughter and want to get it up to snuff so that she doesn't have any trouble. I understand that I need to get an NGk plug, drain the crappy oem oil, and replace the gear oil. I don't know how to drain the gear oil and I haven't the foggiest idea about how to adjust valves. Any recommendations on tutorials or just general advice for self education? Pro tips, etc?
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