Ok so I put a 65 merta on my very good condition za but it makes me worried that it wont last long the way it shifts at such a high rpm . I know Paz has had done it to rebuilt engines but I dont know how hard he rips that shit . I am 240 lbs and am very hard on my vehicles including mopeds . So if I can restrain myself a little how long can I expect it to last ? Any ideal at all ? Paz ?