I have a spun bearing and im about to order a rebuilt kit but when I look up the kit asks for bore size and piston size and all the internals im a newbie and would use all the help necessary.. Thanx for the help anyone

 

you can,t order your rebuild kit until your machine shop looks at your crankshaft,and cylinder walls to give you some measurements.may have already been been machined previously,so go find a shop you can trust to advise you.