Plongy.
I did the braking system on my K2 last year. If you are doing the hoses, then you may as well do the calipers. Then you should really do the master cylinder as well.
I got all the parts for everything from WEMOTO
VSTROM 02/03If you are reasonably spanner educated, then you should have no problems.A very clean workbench [covered in newspaper or similar] is essential.
The pistons in the calipers may be a bit sticky to come out, try and pump them out using the brake lever with the pads out . If one moves more easily than the other, clamp the free one with a G clamp or similar and force the sticky one out first. Access to an airline will make your job easier as well.
Remember the calipers are soft alloy, be careful when you pick the seals out that you do not scratch the cylinder bores. If the pistons are dirty then a polish up with autosol or brasso will do the trick. Make sure eveything is rinsed clean before reassembly. I use methylated spirit, or use brake cleaner or lots of brake fluid. The groove the seal sits in will most likely have crud in it, use a plastic or wooden stick to clean the gunge out. I use a nylon brush in a dremel tool to do mine, but be careful the chuck does not touch the alloy caliper.
To do the master cylinder is similar, but not as dirty. You will need a pair of long reach circlip pliers to get the piston and seals out of the master cylinder.
The new hoses will be fairly easy to fit. Do not tighten anything up tight until you are sure they are lying correctly and do not collide with bodywork on full lock.
Bleeding a completely empty system can be VERY FRUSTRATING :damn:
There are various dodges to overcome this. Raising the calipers above the master cylinder can help, back bleeding by forcing the fluid up the system from a syringe via a bleed nipple, or even removing the complete tightened up system from the bike and bleeding it on the workbench with the calipers higher than the master cylinder.
Do not expect to rush the job and use the bike that evening, be prepared to walk away for an hour or two and then come back when you have calmed down.
I did mine after 60,000 miles, and you will be suprised how much better the brakes feel after it.