Led Indicators - Relay Or Resistors?

It always amazes me that they don't come with them built in, at least as an option.

 

I don't think that it was inconsistent build specs, more that something was changed at some point on the SBK. If you look at the TST website they quote two different flash controller boxes, one for pre 2010 and one for post 2010.
You should only need two resistors for the rear indicators as the fronts are LEDs as standard. You could buy the controller from TST, their sales team are very helpful, and solve the problem with their little box.

 

I think the indicators on your 1098 are the same as those on my Hypermotard. The problem that I had was that the connectors for the indicators are (relatively) new and I didn't have anything to fit them. I also didn't want to chop the original wiring loom.

On opening up the indicator itself I found that the wiring plugs into the indicator body with mini spade terminals. This means that you can unplug the wiring from the indicator and pull the wiring out of the body and use this to connect into your wiring loom.

I crimped some mini space terminals onto my LED resistors and plugged these into the original indicator wiring and then from the LED resistors into the LED indicators with the existing bullet connectors.

It did make the wiring quite long but it means that I didn't have to cut anything that I would rather keep and made it much neater, and I can easily reverse it should I need to.

The LED resistors came with my indicators but you should be able to buy them from ebay cheap enough, eg these ones at £2.99 delivered:
LED MOTORCYCLE QUAD ATV INDICATOR FLASHER RESISTOR RELAY 10w - 2 PACK / PAIR | eBay
(or cheaper if you buy them from China!)

 

No problem HERE it is.
I have spoken to them on the phone and they seem to be very knowledgeable.