When you say you have the Touratech spotlights wired into dip beam, do you mean they are wired directly into the dip circuit (I hope not), or that the dip circuit provides a trigger for a relay and the load for the spotlights comes from the battery. If it is the former, then you are already pushing the boundaries of the headlamp circuit as 2x55W spots and 1x 55W dip beam is going to a total current of 12-14A (depending on charging voltage). Although the headlamp circuit is fused at 20A, the wiring used is 1mm sq. 32/0.20 cable which is only rated at 16.5A so 16A would be a realistic absolute maximum current to consume, which begs the question why Yamaha would chose to fit a 20A fuse when 16A would have been more appropriate? Wiring main and dip together with this set up will tip things over the edge. If you are using a relay and separating the load, then the headlamp circuit will be able to cope with wiring dip and main together, but you’re going to be right at the absolute limit of the alternator’s charging capacity itself, especially considering what’s needed just to run the bike and all the other accessories you have fitted.

Have a read of this thread regarding the charging capacity of the XTZ.

TBH the Touratech spots are a bit old hat now; you can as much, if not more light from LED spots at a fraction of the cost in terms of money and current draw. I would seriously consider ditching the TT spots in favour of some LED lamps. TT spotlights still go for good money on ebay and would easily provide enough capital to purchase a pair of LED lamps and you’d have some spare cash and LOT of spare Amps left over to play with!

Some food for thought…

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