Bike backfired pretty violently and now leaks oil into exhaust pipe when bike is running. I


Information and questions on GL1200 Goldwings (1984-1987)
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Mechbull
Posts: 2
Joined: Sun Jul 24, 2016 4:26 pm
Location: Magnolia, Tx
Motorcycle: 1985 Aspencade

Bike backfired pretty violently and now leaks oil into exhaust pipe when bike is running. I

Postby Mechbull » Sun Jul 24, 2016 4:32 pm



Once bike backfired it started leaking oil. I'm thinking or perhaps hoping only a head gasket. Leaks into left side. Bike runs smooth but right side plugs are dry while left side plugs are wet.



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twocams
Posts: 554
Joined: Tue Sep 29, 2015 11:25 am
Location: Grants Pass, Oregon
Motorcycle: 1985 GL1200 Aspencade, 2003 K1200GT BMW, 1969 R69S BMW
Sold : 84 V65 Magna, 82 Moto Guzzi, XS 1100 Yamaha,84 Wing Int., 80 650 Special, Only new bike 82 XV750 Virago (Guam),Honda 250,84 R100RT BMW,87 K100 LT BMW,93 K1100 LT BMW, 91 535 Virago, Honda 50

Re: Bike backfired pretty violently and now leaks oil into exhaust pipe when bike is running. I

Postby twocams » Sun Jul 24, 2016 10:41 pm

Why did it backfire so violently? Is that oil on the plugs or gas or coolant? Do you have coolant in your oil? Milky looking ****. :o That could be a blown head gasket....or a cracked head....or.

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Mechbull
Posts: 2
Joined: Sun Jul 24, 2016 4:26 pm
Location: Magnolia, Tx
Motorcycle: 1985 Aspencade

Re: Bike backfired pretty violently and now leaks oil into exhaust pipe when bike is running. I

Postby Mechbull » Mon Jul 25, 2016 5:53 am

Not sure it backfired. Bike belonged to father in law, he just gave it to me and even tho the 84 Aspencade has been my dream bike sense I lived across from a Honda dealer when I got out of the Marines in 84 this is my first one. In answer to your question I don't see the milky oil that indicates water. It's oil. As I run the bike and it warms up the leak gets wors . It also looks like it may be coming from around shift lever. But definitely coming out of exhaust pip .

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ekvh
Posts: 140
Joined: Thu Apr 29, 2010 9:52 am
Location: Grand Forks, ND
Motorcycle: 1977 gl1000

Re: Bike backfired pretty violently and now leaks oil into exhaust pipe when bike is running. I

Postby ekvh » Mon Jul 25, 2016 7:12 am

Check your spark plug wiring as there was a printing error in a few early manuals for the 1200. Sitting on the bike, cylinders are front right number one, front left is two, rear right is three, and rear left is four. The mistake is in the firing order from the coils.

It should be so one coil fires 1-2 and the other coil fires 3-4.

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twocams
Posts: 554
Joined: Tue Sep 29, 2015 11:25 am
Location: Grants Pass, Oregon
Motorcycle: 1985 GL1200 Aspencade, 2003 K1200GT BMW, 1969 R69S BMW
Sold : 84 V65 Magna, 82 Moto Guzzi, XS 1100 Yamaha,84 Wing Int., 80 650 Special, Only new bike 82 XV750 Virago (Guam),Honda 250,84 R100RT BMW,87 K100 LT BMW,93 K1100 LT BMW, 91 535 Virago, Honda 50

Re: Bike backfired pretty violently and now leaks oil into exhaust pipe when bike is running. I

Postby twocams » Mon Jul 25, 2016 9:41 am

I can only think of a couple reasons why there might be oil coming out exhaust. Valve guide seals or guides, piston rings, head gasket, cracked head. Those all require the head to be removed. :cry:


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Rusty Bike
Posts: 271
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Location: New castle, PA
Motorcycle: 86 GL1200 SEi, 78 Yamaha XS750SE, 86 Honda XL125, 4.5 HP belt drive Minibike my dad built, foot clutch!

Re: Bike backfired pretty violently and now leaks oil into exhaust pipe when bike is running. I

Postby Rusty Bike » Mon Jul 25, 2016 8:50 pm

Is it coming out of the exhaust or running over the pipe. If there is oil in the exhaust pipe that side would be smoking like a SOB. Strong backfire would be from raw fuel getting in the exhaust. Better check your oil for fuel contamination. If oil is thin when cool and smells like gas then you have carb problems and need an oil change.




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