the spokes break because the tensioner gets pulled into them on my 4 stroke i custom built atensioner thet mounts to the center post i may have a pic of this but it required some fab and welding work, some poeple say to put a bolt thru the frame to hold the tensioner in place, myself and many others here will tell you never drill any part of the frame. we are all here for you so keep the questions coming , i hope you understand what i described as far as going without the tensioner, having the chain come off or going into the spokes can hurt, frank