Brake rotor service limit?


Information and questions on GL1200 Goldwings (1984-1987)
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BladeRunner9
Posts: 59
Joined: Sat Jul 18, 2009 10:44 am
Location: Ontario Canada
Motorcycle: 1987 GL1200 Aspencade
1984 GL1200 Standard
1988 GL1500

Brake rotor service limit?

Postby BladeRunner9 » Sat Jul 18, 2009 5:12 pm



Hello all; I'm new here and have a question; I'm starting a rebuild / renew of a 1987 Aspencade that I bought 2 wks ago. Two of the 3 calipers are seized and one rotor is completely shot.
I have inquired at my local dealer what the service limit is on the rotors, oddly they didn't have a listing for 1987! They have every other yr. but not 86~87. Can someone tell me the minimum rotor thickness/service limit?
I know the rear is a different limit than the fronts...thanks for any help....Barry.



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WingAdmin
Site Admin
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: Brake rotor service limit?

Postby WingAdmin » Sat Jul 18, 2009 11:27 pm

I recommend you download the GL1200 Honda service manual from the manuals page here - you'll need it!

The Honda Service Manual lists the front rotor limits on page 13, and the rear brake rotor limits on on page 14:

Front thickness, GL1200D:
Standard 4.5 mm - 5.2 mm (0.18" - 0.20")
Minimum service limit 4.0 mm (0.16")

Front thickness, GL1200A:
Standard 9.9 mm - 10.1 mm (0.39" - 0.40")
Minimum service limit 9.0 mm (0.35")

Rear thickness:
Standard 6.9 mm - 7.1 mm (0.27" - 0.28")
Minimum service limit 6.0 mm (0.24")

It does not make any distinction for any model years, however that manual was printed in 1984.

The 1986-87 parts manual shows:

Front rotor, 86-87 Interstate: 45120-MG9-000
Front rotor, 86-87 Aspencade: 45120-MG9-870
Rear rotor, all 86-87 models: 43120-MG9-000

The 1984-85 parts manual shows:

Front rotor, 84, 84i, 85L: 45120-MG9-000
Front rotor, 84A, 85A: 45120-MG9-870
Rear rotor, all 84-85 models: 43120-MG9-000

So being that the part numbers are identical for all GL1200 years, I'm going to assume that the limits listed for the 84 and 85 models will be the same for the 86 and 87 models.

Hope that helps!

ekcyclerepair
Posts: 46
Joined: Sun Jul 19, 2009 9:53 am
Location: Salisbury, NC
Motorcycle: Various

Re: Brake rotor service limit?

Postby ekcyclerepair » Sun Jul 19, 2009 10:53 am

The minimum thickness is normally stamped on the rotor itself. Not 100% sure that it's stamped on your bike, but if it is, it will be on the inner diameter and facing away from the wheel. Ernie

BladeRunner9
Posts: 59
Joined: Sat Jul 18, 2009 10:44 am
Location: Ontario Canada
Motorcycle: 1987 GL1200 Aspencade
1984 GL1200 Standard
1988 GL1500

Re: Brake rotor service limit?

Postby BladeRunner9 » Sun Jul 19, 2009 12:07 pm

Thanks Wingadmin & ekcyclerepair..just the info I needed!...... :D




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