Heavy smoke from both sides


Information and questions on GL1000 Goldwings (1975-1979)
Post Reply
User avatar
76GL1000LTD
Posts: 10
Joined: Sun Mar 22, 2020 12:48 am
Location: Regina, SK, Canada
Motorcycle: 1976 Honda GL1000 LTD

Heavy smoke from both sides

Post by 76GL1000LTD » Tue Mar 24, 2020 9:30 pm



Hello all, I have recently bought a 1976 GL1000 with a few issues. First one I'd like to tackle is smoke coming from both exhaust pipes from startup and onwards.
I know that if bike is left on the side stand, it's normal for it to smoke from left side, but this is different. Previous owner suggested valve seals need to be replaced.
Are oem valve seals the best or can I buy aftermarket ones? Please recommend which ones and possibly where.
Is there anything else other than valve seals that can contribute to heavy smoke?
Thanks.


~ Mykhaylo, aka Mike
1976 Honda GL1000 LTD - current
1994 Honda XR650L (first bike) - sold
1978 Suzuki GS1000 - sold
1982 Suzuki GS400L - wife's, sold
2016 Suzuki V-Strom 1000 - totaled

User avatar
DenverWinger
Posts: 1264
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Heavy smoke from both sides

Post by DenverWinger » Wed Mar 25, 2020 5:27 am

Hi Mike, Welcome to the forum!

You say "recently bought" but you haven't mentioned the history on this machine, has it been sitting without run for a long time? If so the smoke may be as simple as an accumulation of "funk" and "smedge" inside the exhaust and mufflers, it may take a little while to burn all that stuff out of there. One member reported discovering smoke caused by a mouse nest in the muffler.

So before trying to diagnose the smoke I'd run the bike a good 100 miles, then re-evaluate.

If still smoking after that, what color is the smoke? Blue = oil, black = fuel, white (steam) with a sweetish smell is antifreeze.

We recommended this to another member of the forum who was concerned about a lot of smoke from his bike and was getting ready to tear into the engine. We convinced him to just ride it around and get some miles on it first. After that he reported back that the smoke was gone.... :)

So put some miles on it first then report back, we can better diagnose from that point, and maybe save some needless engine surgery.
Last edited by DenverWinger on Wed Mar 25, 2020 5:32 am, edited 1 time in total.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

User avatar
Maz
Posts: 710
Joined: Tue May 19, 2015 4:43 am
Location: Kent, UK
Motorcycle: 1975 GL1000K1
1976 CB500T
1979 CB750L
1990 Yamaha FJ1200
1993 Suzuki GS500E

Re: Heavy smoke from both sides

Post by Maz » Wed Mar 25, 2020 5:30 am

Smoke from leaking valve stem seals will clear after a few minutes running and you would see it while riding, after closing the throttle and opening it again at speed ( when the engine is pulling a high vacuum in the cylinders). If the smoke is there all the time, that suggests something else. What colour is it? Black=very rich fuel/air mix (flooding carbs?). White sweet smelling=coolant burning (head gaskets). Blue=burning oil (piston rings/bores). Try to identify the colour/smell first. Follow that with checking the engine oil level. Too high could indicate either coolant or fuel mixing with the oil, indicating head gasket leaking or carb flooding, respectively. Smell the oil. Does it smell of fuel? Check cylinder compressions to see if they are low or unequal, pointing to ring/bore wear. OEM valve stem seals are easily obtainable, but aftermarket ones made from Viton are, in my opinion, better.
Maz
Ironically, Common Sense is the LEAST common of all senses!

User avatar
Rambozo
Posts: 396
Joined: Sun Apr 01, 2018 8:36 pm
Location: Disneyland
Motorcycle: 1992 GL1500 Aspencade

Re: Heavy smoke from both sides

Post by Rambozo » Wed Mar 25, 2020 12:40 pm

Have you tried the patch?

User avatar
76GL1000LTD
Posts: 10
Joined: Sun Mar 22, 2020 12:48 am
Location: Regina, SK, Canada
Motorcycle: 1976 Honda GL1000 LTD

Re: Heavy smoke from both sides

Post by 76GL1000LTD » Wed Mar 25, 2020 9:32 pm

Thank you for your quick responses.

The bike has not been ridden much in the past few years, only about 2500km, or about 1500 miles. Previous owner bought it from his father-in-law, who bought it from original owner 15-20 years ago and has been partially restoring it since. From what I've been told, the engine was taken out but not fully rebuilt, frame was powder coated, plastic parts repainted original color, but carburetors were rebuilt and cleaned recently. Unfortunately I cannot confirm how recently.

Alright, once it warms up a bit (t's actually snowed a bit today again), i'll go for a few runs like you suggested and see if smoke clears up. If not, I'll make a note on what kind of smoke it is, color, etc.

I'll let you know what I discover.

Not sure, what is the patch?
~ Mykhaylo, aka Mike
1976 Honda GL1000 LTD - current
1994 Honda XR650L (first bike) - sold
1978 Suzuki GS1000 - sold
1982 Suzuki GS400L - wife's, sold
2016 Suzuki V-Strom 1000 - totaled

User avatar
Rambozo
Posts: 396
Joined: Sun Apr 01, 2018 8:36 pm
Location: Disneyland
Motorcycle: 1992 GL1500 Aspencade

Re: Heavy smoke from both sides

Post by Rambozo » Wed Mar 25, 2020 9:55 pm

Nicotine patch to quit smoking AKA "That's a joke son. I made a funny, so why ain't you laughing?" :lol:



   Never miss a video: Subscribe to the GoldwingDocs YouTube channel today!

User avatar
76GL1000LTD
Posts: 10
Joined: Sun Mar 22, 2020 12:48 am
Location: Regina, SK, Canada
Motorcycle: 1976 Honda GL1000 LTD

Re: Heavy smoke from both sides

Post by 76GL1000LTD » Wed Mar 25, 2020 10:12 pm

Sorry, missed that joke Rambozo :roll: I don't smoke myself so I thought, what patch, maybe it's some trick I don't know about.
I build desktop computers sometimes as a hobby, and when I hear patch, first thing comes to mind is a software patch. But then I remembered this Goldwing definitely doesn't have ECU so patch cannot be applied. :lol:


~ Mykhaylo, aka Mike
1976 Honda GL1000 LTD - current
1994 Honda XR650L (first bike) - sold
1978 Suzuki GS1000 - sold
1982 Suzuki GS400L - wife's, sold
2016 Suzuki V-Strom 1000 - totaled

Post Reply