I've been wondering about HID lights, too. Les Wassall of HID50 (see http://www.hid50.com/ ) is very well spoken of on UKGSer, so I emailed him to ask about HID kits for the Ten.

Here is my message, and the reply from Les:

Hi Les
I've seen much advice from you and recommendations from others on UKGSer, about the HID50 kits.
I am currently in the process of buying a new XT660Z Tenere. Have you fitted kits to any of these bikes yet? I do a fair amount of riding at night in darkest rural Somerset, and want plenty of light. Can I ask a couple of questions please?
a) Would your advice be to fit dip and main HID, or maybe dip only with auxillary lamps? My initial preference is for dip and main HId, but am prepared to be advised otherwise.
b) What would the cost be for you to supply and fit the options described?


Hi Allan , have not fitted to the yam yet but have looked over one and I think HiD would be no problem at all, the kit is �150 a pair or �75 each, the dip is a must and then the high would be good but not sure how good as i have not seen the o/e lights in operation, also maybe the 35 watt kits would be more than enough for the Yam as usually they are very good lights on Jap bike, the 35 kits are �110 a pair or half for a single, all plus some post.
If the alternator is only small then go for the 35 watt, small ballast as well so easier to fit.
the high beam is instant flash but full light is about 2 seconds.


I'm going to go for HID in some form, but haven't decided what, yet!

Hope this helps.