Your welcome, Fred. See that, 'aluminum stay bar' at the bottom of the radiator? I remove that at the radiator, not the engine side. I then take a bungie cord, load the radiator back and away, watching pivot points and contact angles... Once you pull as far away as you can without damaging or tweaking the radiator out of joint, you are ready for any exhaust system.
First, you have that blue painter's tape for fairing hardware. One piece at a time goes like this. I have a bolt or allen head, washer, grommet, whatever falls in hand, you have that hardware replaced right back in the holes it came out of in the fairing sections. This way, you have nothing scattered all over, wondering where this one came out of and what sequence it reassembles back to. Photos taken beforehand help too.
Then, you cut out cardboard to the square of the inner side of the radiator. Tape that over the radiator fins for protection at the back of your hands, more than for fin damage you can re-bend. You will have plenty of room if you call that room. I've pulled the headers for bung work and have yet to remove the radiator.
Hand assemble the header one piece at a time or assemble as a unit. Whatever works your way and how you want to approach it is that the parts still assemble one way. Line up things before you tighten up parts. Everything will not line up, you tighten something down first.
Same goes with the 3 piece stock exhaust. Headers are tightened first. Exhaust ends are hung and where the best rear bracket seems to lay against it's mounting post is set there. Then tighten the mid clamp if there is one like the stock muffler to end of header. At this point it is all more, straight forward work than anything else. That rear hanger should have no gap and line right up against the bike. You have that gasket squared to the pipe when you bolt down the header band. That means the pipe is well built, you need no shims to stack in between the bike an rear muffler bracket. Last thing you want now is a load on the whole pipe you worked so hard not to have, with each pipe section installed.
Kind of straight forward things go together smooth like a stock set of header/muffler systems. Have fun. Don't call it work and good luck.
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