I'm trying to do a tare down of a locked up 85 250es motor I got on a parts bike. I've never done this before, so forgive me if I'm missing something obvious. I need to get the timing chain off and I can't seem to do it. I took the tensioner off, but there's not enough slack to get it off. I also wasn't lucky enough to have the sprocket be in a position where both the retaining bolts are accessible. I was really hoping to do a top end rebuild only on this motor as I'm guessing it's locked up from sitting outside, but the only way forward I can see is to break the chain.
Anyone have anything else I could try? Also, I watched a video of a 250sx motor tare down, that guy only had to remove the tensioner to get enough slack, is my motor weird or something?