i have a really smal leak in the left fork , so i guees is time to replace seal . so i need
oil seals
oil dust seals , do i have to replace this as well or dont worry about it .
what kind of oil you use in the fork ?
anything else that i need ?
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Belray fluid ftw! Up to a higher viscosity like 15w or 20w for a firmer front fork feel.
Theseals should be the only thing you need. I got mine off e-bay for like $8 shipped.
A seal driver will help immensly! I used my old seals upsidedown and a HD cardboard tube wrapped in electrical taape to drive the new ones in, it worked, but sucked and took a lot of time. A seal driver would take about 1/8 the time I believe.

 

if you have not done it yet, when you do it mix a 10 and 15 weight to get a 12 and you should like it pretty good.