Fork oil change frequency - Ducati.ms - The Ultimate Ducati Forum
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post #1 of 6 (permalink) Old Dec 1st, 2017, 2:27 pm Thread Starter
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Fork oil change frequency

How often should you change fork oil? The manuals for both my Monster and Multistrada say to change it at 18k miles... but that seems like a stretch to me. I have just over 9k on the monster, and was considering changing it over the winter while I have the front wheel off to get a new tire mounted. I've done a few bikes that have over 20k on them, and the oil was pretty funky.

'16 MTS 1200 Touring, '14 Monster 1200, '01 750SS, '08 MTS 1100s(sold)
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post #2 of 6 (permalink) Old Dec 1st, 2017, 3:33 pm
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There doesn't seem to be a consensus on what interval is appropriate for changing the fork oil. Harley-Davidson uses mileage (20,000 mi.) Castrol, a fluid manufacturer recommends time (two years). For average usage, these recommendations are roughly equivalent.

That said, the fork fluid does tend to collect and suspend wear particles, so like the engine oil, the first fluid change is the most effective in reducing subsequent wear. Also, synthetic hydraulic fluids are hydroscopic which, means that they readily absorb moisture from the air, and this water will corrode internal ferrous parts. Silicone and mineral oil based fluids are not hydroscopic. Internal fork parts are plated so water absorption may not be a real concern here.

So it may make no difference. Some bike manufacturers don't even include a fluid change in their service schedule.
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post #3 of 6 (permalink) Old Dec 3rd, 2017, 11:13 am Thread Starter
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Thanks.....I may just go ahead and change it anyway. It's not that big a deal to do it.
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'16 MTS 1200 Touring, '14 Monster 1200, '01 750SS, '08 MTS 1100s(sold)
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post #4 of 6 (permalink) Old Jun 8th, 2019, 11:05 am
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most street guys i know do it every 2 years, or 10000~miles.

the track guys i know do it every season, or every 20 trackdays.

...or more realistically - when they start to leak (grrrr)

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post #5 of 6 (permalink) Old Jun 8th, 2019, 11:54 am
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I do mine when they leak or when I take them apart for some reason. I do a bike when I first get it so I know whatís in there. I donít change it on a regular schedule because I never put that many miles on any one bike in a year.

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post #6 of 6 (permalink) Old Jul 24th, 2019, 12:53 pm
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Quote:
Originally Posted by duc96cr View Post
I do mine when they leak or when I take them apart for some reason. I do a bike when I first get it so I know whatís in there. I donít change it on a regular schedule because I never put that many miles on any one bike in a year.
I'm with cr, same approach but if the bike is going to stay in the garage long term I would probably lean towards the yearly schedule.
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