Hi all. I have a question about the rear of the frame on a mid 80's Max IV. Does the frame have clearance bends for the rear sprockets? The back of my frame looked like it was bent (not by the factory, it was a hatchet job) to either clear a chain / sprocket jam or to allow the chain to move freely . I pounded them out and thought about it after the fact. It will really stink if I have to reshape the frame again. Thanks.