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How many bottles of fork oil to buy?

Old 01-09-2016, 03:00 PM
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How many bottles of fork oil to buy?

My local Honda shop says the superhawk should hold about 450cc's of oil per leg, which equates to 900cc's for both legs. This translates to about 30oz for both legs.

1 liter of fork oil is 33oz.

Using this math I should only need one bottle of fork oil to do a complete fill for both legs, (assuming dry fork legs). Do you guys agree with this, or should I order two bottles? I will be completely cleaning out the forks, drying everything out, then installing fresh oil.

James
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Old 01-09-2016, 06:07 PM
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One would suffice given the quantity needed.
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Old 01-09-2016, 06:46 PM
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If your going to OEM levels one, if your going to a higher(more fluid) you'll need two
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Old 01-10-2016, 06:18 AM
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Good point... I don't remember what oem air gap was, but i'm going to a 140mm air gap.

So how does that change things?

James
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Old 01-10-2016, 08:23 AM
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Originally Posted by thedeatons View Post
Good point... I don't remember what oem air gap was, but i'm going to a 140mm air gap.

So how does that change things?

James
Id have to look up what Jamie told me to set it to.. I just remember I use a bottle and a bit to change seals.
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Old 01-10-2016, 09:29 AM
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I'll just order two bottles... I'm pretty set on running a 140mm air gap, so i figure it'll be better to have some leftover fluid.

James
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Old 01-10-2016, 11:12 AM
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Originally Posted by thedeatons View Post
I'll just order two bottles... I'm pretty set on running a 140mm air gap, so i figure it'll be better to have some leftover fluid.

James
Thats a good bet to not get caught short..... Sorry cant help... I keep so much oil on hand,,, I don't really order for a job, just stock unless it's something I don't have already.
jamie had suggested a oil viscosity of 15-19cSt for my forks (his valves and shim stacks)I chose one at [email protected], Maxima Racing fork oil 5wt.
Next time I drain, clean and refill I may try something in the higher end.
Im told 7.5wt Ohlins is [email protected]
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Old 01-10-2016, 01:15 PM
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I'm going to use Silkolene PRO RSF 7.5. Roger seems to like that one, as do many others on the net.

James
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Old 01-10-2016, 01:28 PM
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Originally Posted by thedeatons View Post
I'm going to use Silkolene PRO RSF 7.5. Roger seems to like that one, as do many others on the net.

James
Unconfirmed but what I have in my notes
Silkolene Pro RSF (7.5wt)
37.00 cSt @ 40c
12.00 cSt @ 100c
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Old 01-10-2016, 01:30 PM
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I'm using stock valving and Roger's fork mod.

James
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Old 01-10-2016, 09:56 PM
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One litre is plenty even with higher than stock oil levels.
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Old 01-11-2016, 06:36 PM
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I don't know if this is a good idea or not, but I usually flush my forks with some paint thinner during an oil change to flush out any sludge, metals, etc. After dumping out the thinner I put some new fork oil in, pump the forks several times and then dump it out before final refilling. Sooo I need a little extra oil.
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Old 01-11-2016, 06:39 PM
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Yes, that is a good idea. I did something similar today.

I rinsed out with QD Contact Cleaner, also filling the cartridge with QD and pumping it out, finally airing everything out with compressed air. I rinsed at least three times...

Good input, thank you!

James
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Old 01-14-2016, 04:21 AM
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Originally Posted by thedeatons View Post
Yes, that is a good idea. I did something similar today.

I rinsed out with QD Contact Cleaner, also filling the cartridge with QD and pumping it out, finally airing everything out with compressed air. I rinsed at least three times...

Good input, thank you!

James
I dump and flush a couple of times with inexpensive ATF, pump dry and invert drain overnight if time permits.

I fill with Silkolene pro rsf 5 wt to 150 mm air gap but I may be high there as I did not check my records and its been 2 years as it's on my winter todo list. My valving and damping is by Greg Nemish. I made my own preload spacers and run RT .90 or .85 springs (again brain fade) but I like it a little soft as it balances well with my Penske shocks spring and damping.
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