id say the time it takes me to turn the bike around in my garden after i fittedthe new kit, after that its mayhem
dnt need 2 rub it in just full y wack all th e wayy ...jokin .lol its say on the manul u sholud ov got with your 172 says 40 to 60 minites .if its second hand dnt need 2 run in
The way i did mine was... let it idle for 20-30mins turned it off let it cool then went out for a drive at quater/half throttle for 15/20mins let it cool rode gently from then while blapping full throttle.. Dont follow my advice, my 172 seized.
way i did it was lookl back through a couple pages of threads and find one of the hundread explinations of running in. get the ring end righ and you DONT run in a nicisil lined barrel