assuming you mean the headlamp, if it is scratched or milky, clean it with plastic cleaner. if its broken, you can buy a replacement oem lens/ reflector 180-061-01. or if you're cheap and handy, look at the one in my gallery. bought a set of two BAJA truck lamps for $20.
just to follow up - got a lens for a grand total of $3.50 from "Scottys Dirt Bike World" in Ringwood (The Gas Gas dealer) and it fits beautifully. He told me it was the same as Honda XR lens.
We just replace the rear indicators totally with small amber clearance lights with 10watt festoons in them. They are only $5.00 each for the whole assembly. You can get them from any automotive store. Keep your standard ones for when you sell the bike.
Cheers
Garry.
If you take the lense into bike shop you'll get a match. They were used on KTMs, Ducaties and otehr Euros of similar vintage. You'll get an aftermarket, or genuine for not a lot. Then remove them and fit something else cheap and low profile. I got some teardrop LED ones for my 650 form Suttos for $20 each. Break them and there'll be a lot more broken as well.