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Enduro Suspension Tuning & maintenance of Enduro forks, shocks, etc |
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#1
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Fork oil weight?
Hey! I'm about to get my forks freshened up a little bit by getting some new fork oil in them. I own a EC125 - 2010 with the 45 mm Marzocchi's, I find them to be pretty harsh in bumpy terrain like stones and roots, this seem to be quite popular with the stock zokes! I am well aware that an oil change won't do things much better, but what oil weight and viscosity should I aim for in order to not make things worse (hopefully xD)?
The recommended oil wt is 7,5 and I'm not really sure which oil to get Anyone that can help me? |
#2
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Hi I am no suspension expert, but lighter oil 5wt should make them softer.
Maybe some suspension gurus can add more. |
#3
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Hi I am no suspension expert, but lighter oil 5wt should make them softer.
Maybe some suspension gurus can add more. Also not all xx wt oils are created equally see the attached viscosity chart. |
#4
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You can try a lighter oil to try and tune out some of the harshness. Might make a difference? Just be aware that not all fork oil weights are the same brand to brand. I think it's important to compare the CST Viscosity to know what you're working with.
I'm a nerd, so I made a table awhile back for reference. Fork Oil CST Values.pdf Good luck. |
#5
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Quote:
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#6
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Go for stiffer springs with less preload and use atf dexron 6 for the fork oil (bang on 7.5w).
Too thin fork oil makes the forks use up travel too early, the first bump will be plush, every bump thereafter will be harsh.
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2006 EC300 Enduro - Ignitech CDI - 38/NECW#2/165 FMF gnarly, FMF shorty, .50 front 5.7 rear 2016 RM-Z450 |
#7
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We mix equal parts 5 wt and 10 wt to arrive at the desired 7.5 wt oil. Pick something you can get locally, reliably ... Maxima is what we use when making the special lube for Marzocchi 45s.
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Steven Beane #275 PlusOnePerformance - Superior Service the World Over - Dearborn MI AMA District 14 (Michigan) Officer afterhourscycle.com Michigan's Beta and TM Race Headquarters |
#8
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If your springs are too light for your weight you may be pushing past the soft part of your suspension stroke. I run 5W oil and sometimes 3.5W oil. I heard that as the light weight oil gets hot the dampening gets unpredictable which is less of a problem with thicker oil. I have not had a problem so far but I do not run long races that would tend to heat up the oil.
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