I am trying to rebuild this AV7 and I need to replace the crankshaft brearings and crank case oil seals. Whats the best way to do this? I found this tool (https://www.1977mopeds.com/Motobecane-Crank-Bearing-Puller-p/3157.htm) but its out of stock and I would rather get a universal bearing removal kit. Any suggestions for what kind of kit I should get? As far as removing the bearings go, I have read about people heating the crank case in the oven and popping the bearings out. Is this an alright method or should I shoot for getting a universal bearing removal kit?