Hello, I had my bike serviced “600 mile tune up” at Honda dealer. It appears to me there is much more slack in the chain than supposed to be (1-1/14). I can’t even get a proper measurement because the slack goes all the way up to axel bar. I think Honda either didn’t check it or did it wrong. I was going to try and adjust it. Problem is axel nuts are on there super tight and I couldn’t budge it with crescent wrench. I didn’t want to damage the nut and I’m not sure how tight to tighten it once I can get it loose (don’t have proper tools yet) . 1st question what size nut is on the axel bar, I want to purchase the correct wrench. 2nd question. What kind of torque wrench do I need and at what setting for proper tightening. 3rd question does the muffler have to come off to get a torque wrench to fit in muffler side? Will try to attach video of chain slack condition.