Just picked up a bike, already having problems


Information and questions on GL1100 Goldwings (1980-1983)
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Token
Posts: 3
Joined: Sat Aug 25, 2018 12:14 pm
Location: US, Florida
Motorcycle: 1981 Honda GL1100
2008 Harley Davidson FXD

Just picked up a bike, already having problems

Post by Token » Sat Aug 25, 2018 12:27 pm



Hey all, I'm new here. I just picked up a 1981 GL 1100 the other day and it seemed to be in pretty good condition. Just yesterday I was riding it around and it felt great.

This morning I started it up and it feels rough. It won't idle anymore without dying, and if I try and hold the rpms at a certain place it seems to struggle to do that. Everything just feels and sounds worse than it did yesterday. On top of that I'm noticing a loud knocking at low rpms that goes away when I throttle it up a bit.

What could have happened?



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Maz
Posts: 527
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: Just picked up a bike, already having problems

Post by Maz » Sat Aug 25, 2018 2:46 pm

Sounds like your carbs have picked up some crud. These engines knock like mad when idling on less than all 4 cylinders. Start it from cold and let it idle as good as it can for a minute. Tap each exhaust header with a damp finger - the hot ones are the cylinders that are firing. The cold ones aren't firing. Possible carb clean due, and make sure you change the timing belts if you don't know when/if they have been done.
Maz
Ironically, Common Sense is the LEAST common of all senses!

Token
Posts: 3
Joined: Sat Aug 25, 2018 12:14 pm
Location: US, Florida
Motorcycle: 1981 Honda GL1100
2008 Harley Davidson FXD

Re: Just picked up a bike, already having problems

Post by Token » Sat Aug 25, 2018 3:52 pm

Thanks for responding! Crud in a carb is what I was thinking. I might have accidentally switched the fuel selector to reserve and sucked some crud out of the bottom of the tank.

I'll try and see if I can figure out which one isn't firing when I get a chance, thank you.

As for the timing belt, I assume it being a old honda motor its a interference motor? If so I'll make sure to do that soon

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AZgl1800
Posts: 1194
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Location: Lake Oologah Indian Territory USA
Motorcycle: '02 GL1800

Re: Just picked up a bike, already having problems

Post by AZgl1800 » Sat Aug 25, 2018 6:45 pm

ummmm,

I prefer using an IR Temp Gun to fingers on exhaust header.
~John

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DenverWinger
Posts: 417
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: 1980 GL-1100 STD Vetter (2005-)
1993 GL-1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL-350 (1980-1988) sold
1978 Suzuki GS-550 (1985-2005) sold
1977 GL-1000 (2002-2006) sold

Re: Just picked up a bike, already having problems

Post by DenverWinger » Sat Aug 25, 2018 11:43 pm

Yup - interference motor.

Honda OEM belts are available, and incredibly 'Spendy'.

Gates T274 Or NAPA Autoparts #250274 Fit exactly. You need TWO belts.

Guess what? The Honda OEM belts were made by Gates, and the NAPA Autoparts #250274 belt is a Gates belt.

The belts are available at your local autoparts store for about $40 each. About $75 ea. from Mother Honda. And about $18 each from Amazon. All of them are the same Gates belt.
They say 98% of all Hardleys ever made are still on the road..... The other 2% made it home. :lol:
(I stole this from somebody on another GW site...) :roll:

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Maz
Posts: 527
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: Just picked up a bike, already having problems

Post by Maz » Sun Aug 26, 2018 3:45 am

AZgl1800 wrote:
Sat Aug 25, 2018 6:45 pm
ummmm,

I prefer using an IR Temp Gun to fingers on exhaust header.
Yeah, me too, but I didn't want to assume that he had one laying around. Most people have a finger or two available and dampening them is fairly easy! :lol: It's a quick and easy way to establish which cylinders are firing/not firing. Maybe I should add the warning "Be careful though... It may be hot! "
Maz
Ironically, Common Sense is the LEAST common of all senses!

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Overdog
Posts: 245
Joined: Sat Oct 12, 2013 7:00 am
Location: Pittsburgh, Pennsylvania
Motorcycle: 83 Goldwing Interstate

74 BMW R90/6

Re: Just picked up a bike, already having problems

Post by Overdog » Sun Aug 26, 2018 8:17 am

Always a good idea to check the reserve setting. I can't remember which forum I was on but somebody said that the first time they had to hit reserve on their oldwing they were stranded, as the reserve pickup was blocked. If you sucked some crud from the bottom of the tank I would think that your fuel filter would stop it before it hit the carb....did you check/change the filter?

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Johnyy Smoke
Posts: 696
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Location: Se Minnesota
Motorcycle: 1980 GL1100
Vetter. "Its like Deja Vu all over again".

Re: Just picked up a bike, already having problems

Post by Johnyy Smoke » Fri Aug 31, 2018 4:09 pm

Fuel filter is a good suggestion. Any other probs? Know any history of the bike? We like pictures! :) Regards, Johnyy

Token
Posts: 3
Joined: Sat Aug 25, 2018 12:14 pm
Location: US, Florida
Motorcycle: 1981 Honda GL1100
2008 Harley Davidson FXD

Re: Just picked up a bike, already having problems

Post by Token » Sat Sep 01, 2018 7:07 pm

Just got out today and put a new starter on because the old one went bad on me. It seems that my carb cleaning helped for the most part. It will idle all day long I believe, it still sounds like it can't hold a rpm very steady though. I for sure have made progross, it's absolutely rideable as is and is a blast. I bet the carbs just need to be synced or something simple at this point.

Thanks guys for all the help! I still need to get some pics for you all.

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Maz
Posts: 527
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: Just picked up a bike, already having problems

Post by Maz » Thu Sep 06, 2018 1:26 pm

Mmmmmm... Pics... We love pics!
Maz


Ironically, Common Sense is the LEAST common of all senses!

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