Marzocchi 66 RC Oil Change

A quick oil change on some earlier fork...it's so easy to do I am amazed people don't do it - as you can see from this fork, it hasn't been done in a long time. Buttery performance now returned with fresh oil and 10 minutes work.

Category:

Sports

Tags:

• marzocchi
• 66rc
• oil
• change
• service

[99williamsc3]

Hi, Ive got 2007 pair of 66 RCV forks and was wondering if you know how I can make them stiffer? They do have compression adjustment but it doesnt stiffen them enough. Can I just add a bit more oil? Cheers.

[blumpher]

Have you set the sag is the first setup issue. Measure the forks fully extended and also when you are sitting on the bike,, the fork should be around 25-30% compressed when you are sitting on the bike normally. If that's ok,are you bottoming them out? If so, adjust the high speed compression damping(if you have it) on the bottom of the fork leg. Or add air to the top of the fork legs if you have the schraeder air valves under the little caps that unscrew on the top.extra oil is a last resort.

[99williamsc3]

Thanks for the reply. To set the sag do I use a shock pump to add air? The forks in question are basically the same as the ones in this video. Was air added to these?

Thanks again.

[blumpher]

@99williamsc3 if you have the 66 with the gold adjusters on the top of the fork legs, you will have to add a bit more oil(not too much or they will not get full travel) as you don't have the air valves. The later ones with the white lowers and black/red tops have air valves you can use a shock pump on.

[rockandrollsuicide01]

Hi Mate, got a 66 all mountain SL1 and the lock out on the right leg has stoped working (no lock-out) was going to send it away for a service/repair but having seen your vids am considering giving it a go myself. Any help regarding what might be wrong with the lock-out would be much appreciated.

[blumpher]

@rockandrollsuicide01 not sure of that one, but I'd try an oil change and put the correct amount of oil in..that might cure it...

[jacobbpitt]

is that 220cc per leg? i need to rebuild mine and i cant find info for it...

[bujablaster]

@blumpher sorry, but:

1) by adding more oil you can tune and prevent metal-2-metal harsh bottoming, but it makes no sense on stifness - stifness you can change by another spring rate or by spring/air preload (if available)

2) older MZCH like my 66 2005 model have air valve in both legs (under golden top caps)

[rockandrollsuicide01]

Hi Mate, got a 66 all mountaon SL1 and the lock out on the right leg has stoped working (no lock-out) was going to send it away for a service/repair but having seen your vids am considering giving it a go myself. Any help regarding what might be wrong with the lock-out would be much appreciated.

[chedgy904]

@blumpher Cheers I will have a look