Sorry to trouble you but for the life of me I don't understand the tech manual for the 2004 marzochi exr supra forks (120mm). They have a coil spring in the left hand leg (As sat on the bike) with an allen key adjuster on the top of the leg. The right hand leg has an air valve on the top and an external rebound adjuster on the base of the leg. Question 1 how do i set the sag? Question 2 is this classed as a spring fork or an air fork as this makes a hell of a difference to the amount of air in the right leg according to the marzocchi pressure tables 0-15 psi for spring fork 35-45psi for air forks (80kg) Question 3 Does the rebound adjusters make a lot of difference to the speed of damping return as fully turned either way it doesn't seem to make any difference. If you could point me in the right direction I would be very grateful as I am a bit of a newb to the game but don't make me go back to the pdf please...

I know this fork well First to set sag - Screw the sping preload in so it sits flush with the top of the sunk section of the section that is covered by that bit of rubber. This gives you a neutral spring, with a choice to add more spring, making the fork ramp up more in the end of the stroke.

Or less, allowing for a more linear travel, once you have set the sag. Now set the air pressure, and the sag. It is an air fork with a spring that controlles the characteristics of the stroke.

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Set the air pressure to set your sag. - You should get about 30% sag. Now you can fiddle with the spring settings to get the feel of the stroke right for your riding. All of that said I run the spring preload quite hard, and a lower air pressure, because the fork is smoother and has better small bump sensitivity in its early stroke when set up this way. The rebound is quite effective, though be careful when adjusting it as it is quite delicate inside. Adjust the rebound so it is quite fast. 8dio Post Apoc.

- I agree there isn't a great deal of difference at both extremes, but it still coveres enough to make it worth setting up correctly. Whytepeak Thanks for that mate I Have just serviced the forks with new seals, oil etc.

Torrent George Harrison My Sweet Lord. As I think they have been there since 2004. Office 2007 Professional Trial Mirror Magic. I bought the bike a few months back and are currently working my way around the servicing. When i put the forks back together they seemed very very different so thought I would check the Marzocchi web site for tuning/set up tips thats when the trouble started! I could not sus whether they were spring or air. They are not that good at explaining what order to do things in. Thanks again borderboy.