Fork oil

CarstenB

Well travelled
Location
h-town tx
the later manuals call for 10W oil with a viscosity range of 35. 10W seems to make more sense than 2W but i don't think that the range is specified on the fork oils i've seen. Maybe in the spec sheets. Interesting to see that they specifiy 1.6 liters for oil changes in those. Use at your own risk....

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MrDralas

Well travelled
Location
Planet Earth
The manual calls for 455ml of fork oil. It calls for 2w 35 oil? I understand the 2w but what does the 35 stand for?
I changed mine with 10w oil and drives like it did before I changed the oils.

the later manuals call for 10W oil with a viscosity range of 35. 10W seems to make more sense than 2W but i don't think that the range is specified on the fork oils i've seen. Maybe in the spec sheets. Interesting to see that they specifiy 1.6 liters for oil changes in those. Use at your own risk....

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I use 2 quarts of oil per oil change and that puts it just at the top of the top line. I’ve noticed some owners manuals from some manufacturers stuff seems to get lost or mixed up in the translations.
 

Bob Smiley

Total noob
Location
USA New England
I changed mine with 10w oil and drives like it did before I changed the oils.



I use 2 quarts of oil per oil change and that puts it just at the top of the top line. I’ve noticed some owners manuals from some manufacturers stuff seems to get lost or mixed up in the translations.
Is the top line easily visible? Anyone know how far down it is (Air gap depth/height down to oil)? Thanks
 

MikeM

Well travelled
Location
So Cal USA
Seems like we ended up talking about engine oil and fork oil in this thread. What could go wrong? :)

I installed emulators in my forks and the company called for 15w but then again you drill a bunch of holes when doing emulator install so the oil flows to the valves better. Fork oil weight is something you can play with to increase or decrease damping. Thinner = less damping effect. You can play with various weights to get the feel “you” want.

Engine oil wise my 2022 manual is as shown above. 1.8 ish liters puts it just above the top line on the site glass after it sits for an hour or two and I’m good with that. Zero oil consumption or loss from venting after 3000 miles.
 

Bob Smiley

Total noob
Location
USA New England
I see what happened there…”top line” was a reference to engine oil…forget that. Question still stands does any know the FORK OIL air gap/depth to oil? Not sure how to go about inspecting it otherwise :) Thanks.
 

Roy Gavin

Well travelled
Ohlins say 220 mm, 10 wt of high performance fork fluid, and their spring is 6.0M/mm , which is probably less than the Race tech selector will give you.
Fully compressed, no spring, as vertical as possible, then 12 mm preload on the spring
 

OurDee

Getting there...
My source told me 170 mm with OEM fork components. I have not checked it out yet. Plan on dumping all the oil and filling with 455 ml. per MOM, Motorcycle Owners Manual. Older manuals said 455 ml per fork of 2W (Viscosity range 35). Newer manuals state 455 ml per fork of 10W/Fork Oil (Viscosity range 35).
 
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