1990 Aspencade fork oil capacity


Information and questions on GL1500 Goldwings (1988-2000)
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702scottc
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Motorcycle: 1980 GL1100 Interstate (sold)
1990 GL1500 Aspencade (sold)
2005 GL1800

1990 Aspencade fork oil capacity

Postby 702scottc » Wed Jul 23, 2014 2:25 am



Can anyone tell me what the fork oil capacity on a 1990 Aspencade is? My manual hasn't arrived yet and I need to change the fork oil. Preferably in ounces per fork.

Thanks



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WingAdmin
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Re: 1990 Aspencade fork oil capacity

Postby WingAdmin » Wed Jul 23, 2014 8:09 am

702scottc wrote:Can anyone tell me what the fork oil capacity on a 1990 Aspencade is? My manual hasn't arrived yet and I need to change the fork oil. Preferably in ounces per fork.

Thanks


I haven't got a 1990 manual, I do have a 1989 manual, and it shows it at 10.9 oz (US) left, 10.8 oz (US) right.

The 1994 manual shows 12.6 oz (Aspencade) / 12.2 oz (Interstate) left, and 12.7 oz right. Not sure what year this changed.

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702scottc
Posts: 249
Joined: Tue May 15, 2012 12:12 am
Location: Las Vegas, Nevada
Motorcycle: 1980 GL1100 Interstate (sold)
1990 GL1500 Aspencade (sold)
2005 GL1800

Re: 1990 Aspencade fork oil capacity

Postby 702scottc » Thu Jul 24, 2014 2:28 am

Thanks for your help. I went ahead and downloaded a manual to my iPad for $10, should have done that from the start. Calls for 10.8 & 10.9 oz like you said. Says to use ATF, I'll just get some fork oil. What weight would you suggest? ATF is typically 5wt, I always used 15 or 20 wt belray in my 1100. Is the spring tension on the fork cap about the same as an 1100? My 1100 has an air cap and a jumper hose, this 1500 doesn't. Rides nice so I guess air isn't really needed.. Was going to drain the forks this afternoon but it hit 112 degrees today in the shade on my patio, a good job at 5am!

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WingAdmin
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Posts: 17045
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: 1990 Aspencade fork oil capacity

Postby WingAdmin » Mon Jul 28, 2014 1:00 pm

702scottc wrote:Thanks for your help. I went ahead and downloaded a manual to my iPad for $10, should have done that from the start. Calls for 10.8 & 10.9 oz like you said. Says to use ATF, I'll just get some fork oil. What weight would you suggest? ATF is typically 5wt, I always used 15 or 20 wt belray in my 1100. Is the spring tension on the fork cap about the same as an 1100? My 1100 has an air cap and a jumper hose, this 1500 doesn't. Rides nice so I guess air isn't really needed.. Was going to drain the forks this afternoon but it hit 112 degrees today in the shade on my patio, a good job at 5am!


The 1500 spring tension on the fork cap is tremendous - attempting to remove it without a tool can result in it tearing out the last one or two threads, launching the cap across the room, and personal injury. I wouldn't recommend it.

I use 15 weight Bel-Ray in my GL1500 forks. With Progressive springs, I run them with zero air pressure. Have a read through How to rebuild your front forks

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702scottc
Posts: 249
Joined: Tue May 15, 2012 12:12 am
Location: Las Vegas, Nevada
Motorcycle: 1980 GL1100 Interstate (sold)
1990 GL1500 Aspencade (sold)
2005 GL1800

Re: 1990 Aspencade fork oil capacity

Postby 702scottc » Tue Jul 29, 2014 12:18 am

Thanks for the info. Can't believe they would make changing fork oil on this bike so problematic. Once I get the caps off the first thing I'm going to do is drill and tap the fork cap for an 1/8" pipe plug. That will fix this issue. Does the tool you mention work with the forks on the bike or do they need to be removed? I know my 1100 had some serious tension on the caps but it was nothing I couldn't push down to start the threads, this one can't be too much different. Tool would be nice.

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WingAdmin
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Posts: 17045
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: 1990 Aspencade fork oil capacity

Postby WingAdmin » Tue Jul 29, 2014 8:52 am

702scottc wrote:Thanks for the info. Can't believe they would make changing fork oil on this bike so problematic. Once I get the caps off the first thing I'm going to do is drill and tap the fork cap for an 1/8" pipe plug. That will fix this issue. Does the tool you mention work with the forks on the bike or do they need to be removed? I know my 1100 had some serious tension on the caps but it was nothing I couldn't push down to start the threads, this one can't be too much different. Tool would be nice.


Most people either drill and tap for a schraeder valve, or buy replacement caps from an SE that have the schraeder valves already in place. That lets you easily change air pressure, and the valves can be easily unscrewed to allow the fluid to be drained and replaced.

The tool can be used on the bike, but the triple tree has to be loosened first, to allow the fork tubes to slide up enough (a couple of inches) to allow the base of the tool to grip the top of the fork.




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