Disassembling the AM 1

So my fork needed it's first oil change, as all forks do during their break in period. The ETA function has never worked and I felt that it had some performance issues that hopefully an oil change would cure.

I looked through several sources of info on oil types and viscocities for Marzocchi forks. I know they use Golden Spectro 7.5wt, but I couldn't find any of it locally and I didn't want to order it. But, I found this on MTBR posted by DGC:

product cSt@40c cSt@100c
Torco RFF 5 wt. 10.75 4.00
Silkolene Pro RSF 2.5 wt. 13.60 5.83
Torco RSF light 14.50 4.70
Racetech (motorex) light US 1 (Manitou??) 15.20 4.40
Maxima fork fluid 5 wt. 15.90 3.51
Torco RFF 7 wt. (Rock Shox) 16.10 5.05
Golden Spectro 85/150 2.5 wt. 16.90 3.82
Honda Pro HP fork oil 5 wt. 17.00 3.80
Bel Ray fork oil 5 wt. 17.10 4.10
Elf syn moto fork oil 2.5 wt. 18.00 4.00
Redline light 18.40 7.10
Torco RFF 10 wt. 19.90 5.70
Spectro fork oil 5 wt. 21.60 4.40
PJ1 fork tuner 2.5 wt. 26.10 4.90
Golden Spectro 125/150 7.5 wt. (Marzocchi) 26.10 5.25
Silkolene pro RSF 5 wt. 26.70 9.46

Maxima fork fluid 7 wt. 26.70 5.36
PJ1 fork tuner 7.5 wt. 27.50 5.10
Bel Ray fork oil 7 wt. 29.00 5.20
Redline medium 30.40 10.80
PJ1 fork tuner 5 wt. 31.20 5.40
Fox fluid and Torco RSF medium 31.82 9.57
Maxima fork fluid 10 wt. 32.00 6.28
Torco RFF 15 wt. 33.00 8.40
Redline D4 ATF/Mobil 1 ATF 34.00 7.50/7.60
Castrol synthetic fork oil 10 wt. 42.00 7.50
Torco RFF 20 wt. 42.80 10.40
Maxima fork fluid 15 wt. 46.00 8.48
Motorex semi bath-Manitou 5w40 90.90 Syrup..!! 14.60
PJ1 fork tuner 30 wt. 116.90 gooo..!! 15.00

Also, this is a great website with some really good info on forks, springs and other bike and motorcycle stuff:

http://www.peterverdonedesigns.com/bikesuspension.htm

Not to get too winded, I chose Silkolen since it was close in viscocity to Golden Spectro. It was cheap, too.

The disassembly went fine, no problems. When all was said and done though, the ETA wasn't fixed, but the fork action is much smoother than before. I will have to send it in to Marzocchi to have that tweaked. All in all, after having been disappointed with this fork initially, I'm liking it more. It does need a 20mm thru axle upgrade, though and now that I'm comfortable taking it apart, that shouldn't be too hard to accomplish.