first off check all the bulbs. they should be 10W bulbs. these can be tricky to come by and are sometimes swapped out for 5w bulbs which causes timing problems
second check the torque on the two bolts holding the nose fairing. if these arn't done correctly the connecters to the turn signal dont line up properly
third. check your connections
i'm sure some others will pop in with some things to check but my best guess is that if its not the bulbs it will be the relay (these are on the left hand side of the bike under the fairing.) a number of people have had these fail (myself included- twice). you can get OEM replacements or there is an aftermarket replacement from NAVRA that has a better service record.
The first thing you need to do is check that the upper fairing supports have both the small pips still in place at the bottom of the fairing supports?
To do this you will have to take the upper faring off!!
The most common reason for indicator faults is that when the upper fairing is taken off and then replaced is that the small nipples on the bottom of the fairing mounting brackets get busted off (There should be 2 on the base of each upper fairing bracket.
This damage is very common and is often caused by over tightening of the long screws that secure the upper faring.
It causes the electrical connection to the mirrors to be miss aligned and then the indicators only work spasmodically
This problem is easy to fix, but make sure you check this out first!!
I know i'm responsible for breaking one of the little buggers... but i lay blame on others for the rest.
Where the pins have broken off it will have left a visible scar,
I have simply drilled the brackets and then screwed in a shortened (thread about 6mm and shanked) allen screw 4mm in diameter (I think!) most of the ones I have done have even cut their own thread into the bracket too as the bracket is made of a soft alloy.
You only need to have about 5-6mm of thread on the allen screw.
Make sure you don't drill right through the bracket (Not that its the end of the world in you do anyway) and once screwed into place up to the shank of the screw using a bit of loctite, carefully cut the shanked part of the allen screw off screw off so all that you should now have visible is the peg in essence leaving about 3-4mm protruding.
Finish the job by rounding off the edges of the newly fitted peg using a small needle file and there you have it
This home made peg will never break off and providing you are careful it will stay put and not deteriorate if its made from a stainless steel allen screw.
Just remember to make sure the shank of the allen screw you intend to use is a nice fit in the reciprocal socket on the electrical plate.
$70 saved immediately and the job will last forever and no more indicator hassles
Just be very careful when you go about this job and don't rush it, make sure you are able to grip the fairing mount securely without damaging it too.
Its really no big deal just some care is all that's needed.
I hope this helps some of you make a cost effective repair, and always check both these pegs are in place whenever removing the upper fairing.
over tighten the long screws that locate the upper fairing as this is the prime reason for these pegs breaking off in the first place, as the long upper fairing mounting screws (1 on each side) go into the electrical plate at an angle, effectively pulling the fairing brackets forward against the pins.