Hi Zombie Stomp
Before you get all excited about your fabulous output from the alternator you need to consider the following...
The engine needs 35 watts to run or 3 Amps
The headlight, if it's an H4 bulb, is 55w or 4.6 Amps
The instrument lights (on when you have the lights on) are 3.4w each and there may be 4 of them = 13.6w or 1.13 Amps
The tail light is 5w or 0.42 Amps
the brake light is 21W or 1.75 Amps
The indicators (only on for a short while obviously) are 21w each with a 5w instrument panel light = 47w or 4 Amps
You've just fitted heated grips that are 36W or 3 Amps (less than a pair of moulded ones and nowhere near as warm - I've had both types)
So, if your engine is running and you have your lights on whilst braking and indicating you're using 176.6w or 14.72 Amps - your generator is roughly 187w if it's the same as mine, an 600E 2003.
If your heated grips are on then you will be running a deficit until you knock off your indicators and brake lights.
I'm fitting a front CREE LED lamp that draws 10w or 0.83 Amps so I don't have to run with my headlight on when traversing Europe, Asia, Alaska and Canada next year. Then I can run my 40w heated waistcoat as well as my 50w heated grips. I have already cut down my energy usage by fitting a 35w HiD headlight unit which is 3 times brighter than the H4 and uses 20w less on dip and 25w less on main beam.