17A @ 14V is 238 W, but that's peak output. Without knowing the bike it's hard to say what the output in real life will be.
The ignition will use 20-30W but that's a very rough number it'll vary with condition as well as design (How many plugs, FI pump etc.). Fuse size only tells you what the cables are designed to take, not the constant throughput. Some will be rated based on not worrying if the lamp burns out.
Actual output 200W (about 85%)
Ignition: 25 W
Lights: 55W + 5W
Spare capacity: 115W
If the battery is good, the weather not too cold and you ride without frequent stops it'll keep up. If you drop the output you are in trouble. In bad weather I'd work on 60% output not 85, so I'd be worried.
I'd replace the tail light with an LED and turn the grips and lights off about 15 minutes away from home if it's safe.