Clutch and oil problem


Information and questions on GL1200 Goldwings (1984-1987)
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LWH
Posts: 36
Joined: Sun Sep 02, 2018 4:05 am
Location: United States
Motorcycle: 1985 GL1200 Interstate

Clutch and oil problem

Post by LWH »



1985 Interstate no clutch problems till 200 miles ago when I changed oil to 15-50 Mobile 1 oil clutch is now slipping and did I mess up



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rrod1393
Posts: 56
Joined: Wed Aug 22, 2018 3:56 pm
Location: Freehold, NJ
Motorcycle: 1985 GL1200 Interstate
2000 Kawasaki Vulcan 1500 Classic

Re: Clutch and oil problem

Post by rrod1393 »

Not an oil engineer, but if that oil had friction additives that could be your problem. Try using a motorcycle oil or shell rotella t4 15-40 (that's what I use).

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LWH
Posts: 36
Joined: Sun Sep 02, 2018 4:05 am
Location: United States
Motorcycle: 1985 GL1200 Interstate

Re: Clutch and oil problem

Post by LWH »

Ok here's what I found out, the mobile 1 oil 15w50 red label is marked SL which means it has had moly added so there I am going to drain and mix with a non-SL oil, SL is a mark for Friction Modifiers added

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Rednaxs60
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Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD
1995 GL1500 SE CDN Edition
2012 Suzuki DL1000 VStrom
2008 GL1800 (sold)
Ontario 1985 GL1200 LTD (sold)

Re: Clutch and oil problem

Post by Rednaxs60 »

Only use oils that have an API donut with the lower half blank as per:


The lower half left blank indicates there are no energy or friction reducing additives in the oil. These older GWs were designed to use a high detergent, good quality oil with no additives, just like the cars of the day. The latest specification for an equivalent oil is the "SN" specification. Euro formulations as well as the Shell Rotella oils are good, as are the others such as Mobile 1, but the issue is to find an oil that has an API donut (it is called this) with the lower half left blank. JASO specification came in in 1999, good info but not a requirement to follow. Good luck. Cheers
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

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LWH
Posts: 36
Joined: Sun Sep 02, 2018 4:05 am
Location: United States
Motorcycle: 1985 GL1200 Interstate

Re: Clutch and oil problem

Post by LWH »

Ok update I used Rednax advise and changed the oil and used an oil as he said, took the bike out after the oil change and within 2 miles it stopped slipping and running great now



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