Join Date: Mar 2016
Location: Nieuwegein, The Netherlands
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The workshop manual states the stock battery to be 12V, 10Ah. That means the battery theoretically could deliver 10A at 12V for 1 hour [when fully charged].
But for a shorter time it can deliver much more current. For example, the electric starter motor is 12 V, 0.7 kW. That is a current of 58 amperes! Mind you, the starter motor current is only that high when you push the starter button and the engine is not yet rotating; once the engine starts to rotate, the starter motor current will drop rapidly.
So the current for the PIAA horn is not the problem; it's the internal resistance of the wiring to the horn and the current rating of the horn button on your handlebar. BTW, also a horn has a pretty high in-rush current.
That's why Derek is very right in advising a relay.
Alleen een motorrijder begrijpt waarom een hond zijn kop uit een rijdende auto steekt...
Only a motorcyclist understands why a dog sticks his head out of a moving car...
Quote by Joost Overzee