I have fitted the KTM handguards which allowed me to keep the original bar end weights. These guards seem to be the only ones around that have a hole for the bar end that is big enough to mod to allow the bar end to be replaced.
PS at the moment I have totally butchered them, taking off the lower and upper deflector parts to make them thinner so that they are basically a bar which in turn supports my MUFFS to keep them in shape.
The only downside is that I've had to buy another pair of thinner gloves because my hands get soooooooo warm and comfy and I don't need thick gloves anymore when it's so cold!!!!!!!