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Re: Change Fork Oil Every 6000 miles ...? [Re: KevinP64] #5039426
03/11/19 01:28 PM
03/11/19 01:28 PM
Joined: Dec 2005
Posts: 3,564
The Canyons
02SE Offline
02SE  Offline

Joined: Dec 2005
Posts: 3,564
The Canyons
The grease in the steering head bearings doesn't deteriorate as quickly as the fork oil, so service intervals are generally much longer.

As far as HD's, the irony is that they've used "metric" suspension (Showa, the main supplier for Honda) for a long time.

Re: Change Fork Oil Every 6000 miles ...? [Re: LoneRanger] #5040597
03/12/19 01:58 PM
03/12/19 01:58 PM
Joined: Sep 2008
Posts: 169
Greece
berlyn Offline
berlyn  Offline

Joined: Sep 2008
Posts: 169
Greece
I usually change the fork oil once every 20-25k km.
Every time I change it I say that once again I neglected it..it is full of metal shavings, seen clearly with a strong flashlight. No hard use of the bike, seals and scrapers also working perfectly. Normal wear.

Re: Change Fork Oil Every 6000 miles ...? [Re: LoneRanger] #5041236
03/13/19 05:53 AM
03/13/19 05:53 AM
Joined: Jul 2012
Posts: 2,798
South Carolina
alarmguy Offline
alarmguy  Offline

Joined: Jul 2012
Posts: 2,798
South Carolina
Originally Posted by LoneRanger
No drains. Requires disassembly of fork.


I feel your pain. Harley USED to have a drain from what I understand, no more. However HD doesnt recommend any fork oil change but does recommend front fork rebuild (with new fluid) at 50,000 miles.


14 Road King (current)
08 VStar 1300 Tourer
07 Suzuki C50
Re: Change Fork Oil Every 6000 miles ...? [Re: alarmguy] #5041720
03/13/19 02:34 PM
03/13/19 02:34 PM
Joined: Aug 2011
Posts: 3,472
N.C.
gman2304 Online content
gman2304  Online Content

Joined: Aug 2011
Posts: 3,472
N.C.
Originally Posted by alarmguy
Originally Posted by LoneRanger
No drains. Requires disassembly of fork.


I feel your pain. Harley USED to have a drain from what I understand, no more. However HD doesnt recommend any fork oil change but does recommend front fork rebuild (with new fluid) at 50,000 miles.

HD done away with the fork drain screws in 2006. My 2009 Superglides owners manual and shop manual says to “replace” front fork oil at 50,000 miles. I’m assuming replace means to change. Not a mention of a rebuild or any parts being replaced except fork oil. Having said that, when I reach 50K I’ll probably do the rebuild since the forks have to come off anyway.

Last edited by gman2304; 03/13/19 02:40 PM.
Re: Change Fork Oil Every 6000 miles ...? [Re: LoneRanger] #5042690
03/14/19 11:25 AM
03/14/19 11:25 AM
Joined: Feb 2015
Posts: 343
Phoenix, Az
MoreCowbellAz Offline
MoreCowbellAz  Offline

Joined: Feb 2015
Posts: 343
Phoenix, Az
I think that HD 50k drain interval is even crazier than the 6k interval. HD specs a 20k interval for '00 Road King, which seems about right for that bike, maybe 25k at the high end, by then it's pretty nasty looking. At 50k, no way that oil resembles anything most of us would even remotely consider using in our bike. But I guess you have to keep in mind how many HD's ever hit 50k, maybe 5-10% of them?

Any OP, you seem pretty meticulous with you maintenance habits, I'd say continue with your gut and try to push that interval out after the first change. 12k really isn't that much. Think there's any chance Guzzi is thinking most of their users aren't going to do that many miles in the first place, therefore they're just addressing the first fork oil change?


07 Toyota RAV4 2.4L
07 Toyota Prius Touring
00 Harley Road King Classic
11 Kia Soul 2.0L (mine to maintain)
Re: Change Fork Oil Every 6000 miles ...? [Re: MoreCowbellAz] #5043117
03/14/19 05:48 PM
03/14/19 05:48 PM
Joined: Aug 2011
Posts: 3,472
N.C.
gman2304 Online content
gman2304  Online Content

Joined: Aug 2011
Posts: 3,472
N.C.
Originally Posted by MoreCowbellAz
I think that HD 50k drain interval is even crazier than the 6k interval. HD specs a 20k interval for '00 Road King, which seems about right for that bike, maybe 25k at the high end, by then it's pretty nasty looking. At 50k, no way that oil resembles anything most of us would even remotely consider using in our bike. But I guess you have to keep in mind how many HD's ever hit 50k, maybe 5-10% of them?

Any OP, you seem pretty meticulous with you maintenance habits, I'd say continue with your gut and try to push that interval out after the first change. 12k really isn't that much. Think there's any chance Guzzi is thinking most of their users aren't going to do that many miles in the first place, therefore they're just addressing the first fork oil change?
. Your 2000 RK has air forks. Both my Electra Glide Ultras had air over oil forks which is the reason for the shorter drain intervals. I’ll change my Superglides fork oil at 50,000 miles.....if it makes it! Tripped 40,000 miles today on a 110 mile ride.

Last edited by gman2304; 03/14/19 05:51 PM.
Re: Change Fork Oil Every 6000 miles ...? [Re: gman2304] #5043846
03/15/19 01:31 PM
03/15/19 01:31 PM
Joined: Feb 2015
Posts: 343
Phoenix, Az
MoreCowbellAz Offline
MoreCowbellAz  Offline

Joined: Feb 2015
Posts: 343
Phoenix, Az
Originally Posted by gman2304
Your 2000 RK has air forks. Both my Electra Glide Ultras had air over oil forks which is the reason for the shorter drain intervals. I’ll change my Superglides fork oil at 50,000 miles.....if it makes it! Tripped 40,000 miles today on a 110 mile ride.


I'm not positive what you mean by "air over oil forks", but I assume you mean both oil and pressurized air. That's how my forks are anyway, basically just regular old damper rod forks with an air fitting to make some minor adjustments. I assume your SG forks are catridge forks? Still, 50k seems pretty steep. I'm sure 50k won't cause them to seize or anything, I just gotta think that old fluid would be loaded with particulates and moisture by then.

Anyway, sorry to hijack.............back to the OP's Guzzi......did you decide?


07 Toyota RAV4 2.4L
07 Toyota Prius Touring
00 Harley Road King Classic
11 Kia Soul 2.0L (mine to maintain)
Re: Change Fork Oil Every 6000 miles ...? [Re: LoneRanger] #5044672
03/16/19 08:02 AM
03/16/19 08:02 AM
Joined: Jul 2012
Posts: 2,798
South Carolina
alarmguy Offline
alarmguy  Offline

Joined: Jul 2012
Posts: 2,798
South Carolina
50K changes are perfect for the new bikes and why the only fork oil requirement for the new bikes. Get the shocks rebuilt and your good to go another 50K miles.
The fork oil viscosity doesnt change over that time, its straight weight oil.

Im not so sure why sometimes we second guess the manufacturer of the products, here we are being told, no need to change fork oil for 50k miles and we still look for an excuse to call the manufacturer crazy.
Well, heck, there was even a time when automobile spark plugs had to be changed as 12k intervals, Im sure when it went to 100k intervals there were still people who changed their plugs at maybe 15 k instead. :o)

Chalk another check mark for Harley! No fork oil changes for 50K, no valve checks/adjustments and lets remind everyone we get 15K + out of the rear tire! 20K+ out of the front!
Hey, I owned 2 metrics and I LOVED them but hated replacing tires all the time, valve adjustments and being this is the longest I kept a bike, dont have to worry about the fork oil.

Knock wood, Owned this bike since new and 25,000 miles now, I still have not needed a repair, bike doesnt drip, lose or burn any oil between changes on the Road King, I will admit I get antzy at times and wouldnt mind a new one, but I just dont trust the new M8 engine, prices are going way too high and I hate the new colors and black painted metal.
I feel mine is almost one of a kind being Amber Whiskey and two tone Silver.

I think I will do what gman, will just bring it in get the forks rebuilt AND at the time, the steering head bearings serviced.

Last edited by alarmguy; 03/16/19 08:05 AM.

14 Road King (current)
08 VStar 1300 Tourer
07 Suzuki C50
Re: Change Fork Oil Every 6000 miles ...? [Re: LoneRanger] #5047701
03/19/19 08:58 AM
03/19/19 08:58 AM
Joined: Jan 2008
Posts: 217
FL
eddy21 Offline
eddy21  Offline

Joined: Jan 2008
Posts: 217
FL
I change every 15k . I've found the bushings last longer . When the teflon wears off the bushings it starts wearing on the outer tube .


15 Fiesta ST
Re: Change Fork Oil Every 6000 miles ...? [Re: LoneRanger] #5047954
03/19/19 01:36 PM
03/19/19 01:36 PM
Joined: Sep 2015
Posts: 6,172
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline

Joined: Sep 2015
Posts: 6,172
Kalifornia Kollective
Change it now and use good fluid. Change it again in a year and see what it looks like ... That will tell you what sort of interval you should be shooting for smile


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: Change Fork Oil Every 6000 miles ...? [Re: BrocLuno] #5048787
03/20/19 09:54 AM
03/20/19 09:54 AM
Joined: Jun 2005
Posts: 1,959
Cedar Park, TX
sunruh Offline
sunruh  Offline

Joined: Jun 2005
Posts: 1,959
Cedar Park, TX
Originally Posted by BrocLuno
Change it now and use good fluid. Change it again in a year and see what it looks like ... That will tell you what sort of interval you should be shooting for smile


yes because *looks* mean everything when it comes to oil


and yes i've done voa and uoa on fork and shock oils


motorcycle oil myth buster
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