Yamaha in their wisdom only gave the front forks of the old Fazers a thin laquer protective coating which, after a few years getting bashed by stone-chips and wet weather, usually end up looking mottled and ugly with patches of white. It's not true corrosion as such because the forks themselves aren't degrading, just the laquer. The good news is that if you are prepared to put in a bit of time and effort, you don't have to 'fork' out (groan) on replacement parts. The laquer can be stripped back, and the alloy beneath polished to perfection. You can (with care) do this in situ without removing the forks (albeit removal makes the process a hell of a lot easier). Instead, remove the front mudguard, unbolt the front brake calipers and (supporting their weight with bungee rope) tie them back out of the way. Cover up the front wheel and surrounding body-parts, as it's now time to get busy with Nitromoors (paint stripper) on the laquer! Sounds scarier than it actually is, but has no adverse effects on the forks themselves. It does take time, but can be helped along with fine gauge wire-wool and very fine sandpaper. Next step is to load fresh wire-wool with Autosol, and use this to rub away at the exposed alloy, while periodically cleaning & buffing down the forks with clean cloths. Common sense should prevail, and you'll soon get the hang of achieving best results. The end product is well worth the effort! Two nights hard graft turned the shabby forks of my otherwise immaculate year 2000 Fazer into a mirror finish, which are easily kept pristine through the usual motorbike cleaning regime. On the topic of common sense, anyone carrying this process out should take the usual precautions when working with paint stripper - well ventilated area, avoid skin contact . . .blah, blah, blah! Hope this posting helps?