Tell me more......bike electrics are one of many areas I am deficient in?!
Ben
The stock horn's pretty small and it's current draw is likely less than a louder aftermarket horn or pair of horns. The metal contacts in the handlebar switch
may be up to the task of carrying the extra load on a bigger horn. Thing is, if one is wrong about that, the fix can be quite expensive. MSRP for the left side switch is about $145USD.
A safer bet is to let a heavy duty relay carry the load. I like to wire them as follows: Use the original horn wires and connectors to fire the relay. The tiny load of the electromagnet coil inside a Bosch type relay won't bother the horn switch at all. Running power straight off the battery through a fuse to the supply side of the relay and the output to the new horns completes the setup once the horn(s) ground is taken care of.
Need to sound the horn? Press the button, the relay is energized, closes the internal contacts there and things get loud.
If the relay wears out, it's a <$10 fix vs. a new handlebar switch.
A good horn set will come with at least a 20A relay. 30A fog light relays work nicely and inexpensively, too.
Hope that helps and wasn't too long-winded!
=)
