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Old 08-09-2017, 06:05 PM   #1
ldhthept   ldhthept is offline
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Fork oil change

06 Nomad 60k miles. I've changed fork oil once, went to 15w, and changed the stem bearings at the same time. How often should they be changed? I'm not having any problems and the bike is smooth as glass hands off going down the road.


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Old 08-10-2017, 04:30 PM   #2
Sabre-t   Sabre-t is online now
 
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It may be overkill, but I change fork oil, grease the stem bearings and change the coolant every 2 years all at the same time. It's also a good time to check the wheel bearings, rim and disk runout and thickness, etc. I just finished doing that last month for the first time on the Voyager. I went to a 15W, too. Be sure to use the same brand and weight next time you change the fork oil. The weigh numbers on fork oils very inconsistent between brands. There are no standards for fork oils like there are for motor oils.

2 years or 15K - 20K miles, whichever comes first is a common recommendation for change intervals. It amazes me that Kawi does not have it on the maintenance schedule at all, at least for the Voyager. Fork oils have acid inhibitors that will get used up over time.
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Old 08-11-2017, 04:00 PM   #3
VulcanJeff   VulcanJeff is offline
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The 2005 1500 Classic factory manual calls for 2 years of 15k miles. It does seem odd the Voyager manages to slip by that recommendation.

I was not aware fork oil weights do not conform to a standard.
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Old 08-11-2017, 05:01 PM   #4
recumbentbob   recumbentbob is offline
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Fork oil weight is measured in Centistokes. Which is kind of confusing.
See chart
http://mahonkin.com/~milktree/motorcycle/fork-oil.html
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Old 08-11-2017, 05:50 PM   #5
CRocker   CRocker is offline
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I have seen that chart before...really made my head hurt...
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Old 08-11-2017, 09:33 PM   #6
Sabre-t   Sabre-t is online now
 
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Quote:
Originally Posted by recumbentbob View Post
Fork oil weight is measured in Centistokes. Which is kind of confusing.
See chart
http://mahonkin.com/~milktree/motorcycle/fork-oil.html
That chart is organized by Centistokes for comparison purposes only; it is not a standard. The weights listed on the oils are not consistent with the Centistoke viscosities. That is the whole point of the table: fork oils from different mfgs that list the same weights will not have the same viscosities. The table was cut and pasted from an article published online some years ago. I can't find a link to the original article anymore, though.

I have never seen viscosity, Centistoke or otherwise, values listed on a bottle of fork oil, only "weight" values.


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