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Time to change sprockets and chain but the front sprocket won't budge !! It's an 88 but hopefully someone can help me solve the problem. Used an impact gun, then a breaker bar and finally heated the nut but this thing wont' move.
I've changed a lot of sprockets but this one has me baffled. I've thought of taking a cut off blade on a dremel and splitting the nut but that may not work.
try some penetrating fluid on it, then tighten and loosen it with your impact to try and break the rust free. Just out of curiosity, what psi are you running your impact at?
Its an electric impact gun. I've removed lots of stuck bolts with it but not this one. I do have an big impact that you hit with a hammer. I'll try it next. I am soaking it with PB Blaster.