Just bought 78 GL1000. Now what?


Information and questions on GL1000 Goldwings (1975-1979)
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pierce
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Motorcycle: 1978 GL1000 Goldwing

Just bought 78 GL1000. Now what?

Postby pierce » Sat Dec 03, 2011 9:19 am



So I just bought a 78 GL1000 that seems to be in good condition. I have quite a bit of experience working on motorcycles (and do all my own work) yet know nothing about the Goldwing so looking for any help that can be provided. This winter I plan on rebuilding anything necessary, taking it apart, cleaning it up so I can take some longer trips with it. As of right now, it runs fine, but it occasionally backfires. The owner told me that someone told them that the carbs 'needed work', and this would fix it. What would any of you recommend are the top priorities on getting this machine running smoothly and reliably?

I planned on the basics of course - oil, filter, replacing most of the rubber. Would a carb rebuild kit be recommended? Also, where could I find new carb boots (just the rubber). Next step would be syncing the carbs, fuel filter. What else should I do?

It also came with a custom paint job, touring seat, full fairing and plan on stripping the front end, cleaning and painting everything with new bars and perhaps leaving it naked, or replacing with smaller fairing.

Any reccomendations would be greatly appreciated.



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dingdong
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Re: Just bought 78 GL1000. Now what?

Postby dingdong » Sat Dec 03, 2011 9:34 am

Welcome to the site. You will get plenty of help here. To start go to www.randakks.com and read everything there. Then go to this site for a manual. http://myweb.midco.net/gl1100singlecarb ... anual.html
Tom

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thrasherg
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Re: Just bought 78 GL1000. Now what?

Postby thrasherg » Sat Dec 03, 2011 9:39 am

You sound to have the right idea, I would be looking to change all fluids (fork oil, engine oil, transmission oil, brake fluid) then check timing belts/chains, check brake pads, check valve clearances, sync carbs, check electrics, overhaul carbs and finally check the mechanical advance for the ignition.. I believe it has counter weights and a vacuum advance so you need to check the rubber diaphragm has not split as that will also cause back firing.. Then check steering bearings, wheel bearings and swing arm bearings (and grease splines on drive shaft) and you should be good for many miles of trouble free riding..

Oh and welcome to this site, there are hundreds of great people here and no such thing as a dumb question.. Fire away with anything..

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Last edited by thrasherg on Sat Dec 03, 2011 10:08 am, edited 1 time in total.

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pierce
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Re: Just bought 78 GL1000. Now what?

Postby pierce » Sat Dec 03, 2011 10:05 am

Thanks so much for the quick replies!

I now have the owners and service manual, but the parts manual didn't seem to want to download properly (tried several times). Does anyone happen to know where I could a hold of one?

Also, are these the carb boots? Trying to get all the carb parts needed for an overhaul and sync but without the parts manual I am unsure of where to buy the boots.

http://www.saber-cycle.com/store/product987.html

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Fred Camper
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Re: Just bought 78 GL1000. Now what?

Postby Fred Camper » Sat Dec 03, 2011 10:38 am

Customer service at Sabre is very sad, I suggest you avoid. This is an interference engine. So if the belts brake, you shop for a new engine. Change those belts even if they look good unless the po already did it. 5 years max on belts. Rebuilding carbs may not be needed. Randaks video is very important if you only want to remove carbs once.

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pierce
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Re: Just bought 78 GL1000. Now what?

Postby pierce » Sat Dec 03, 2011 1:18 pm

So where could I get the rubber couplings?

I will put the timing belt at the top of my list. I assume napa or similar store may have a replacement? Anyone have part numbers? I will search the forum as well.

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Fred Camper
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Re: Just bought 78 GL1000. Now what?

Postby Fred Camper » Sat Dec 03, 2011 2:32 pm

Napa has the belts, a search will turn up numbers. Try cyclepsyco or cresent moon or winginnovation for the carb boots.

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pierce
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Re: Just bought 78 GL1000. Now what?

Postby pierce » Sat Dec 03, 2011 2:39 pm

Got it - just needed to read Randakk's a bit more comprehensively .....

Gates #T274

NAPA #250274

Goodyear Gatorback #40274

Figure I will replace the radiator hoses, and coolant at the same time since it will be coming off. As suggested, will cut from Dayco #71218.

Thanks!

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pierce
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Re: Just bought 78 GL1000. Now what?

Postby pierce » Mon Dec 12, 2011 8:52 am

OK, have cleaned and synced carbs, replaced belts, oil, and it is running much better. Going to replaced all cables as clutch and throttle response is a bit tough.

After working on the bike I noticed that the exhaust system is a bit rough. If I were to replace it I assume that any year GL1000 would fit. Would any other model fit? It sure looks like the 1100 would, but have no first hand knowledge of this. What models would fit my bike?

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Re: Just bought 78 GL1000. Now what?

Postby WingAdmin » Mon Dec 12, 2011 10:46 am

I replaced the throttle and clutch cables on my 1100 when I got it, just because I had no idea how old they were, what condition they were in, and I could really do without having a clutch cable snap on me in the middle of nowhere.

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Fred Camper
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Re: Just bought 78 GL1000. Now what?

Postby Fred Camper » Mon Dec 12, 2011 12:00 pm

Regarding the exhaust, most 4 Cylinder GL systems will go on with some tweaks. The port are the same spacing but the block does vary. I found a set of early 1200 headers would fit my 1977, but they almost touched the block, so I could not have wrapped them. So depends on what you find locally. The HD mufflers are high quality and fit well too.

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pierce
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Re: Just bought 78 GL1000. Now what?

Postby pierce » Mon Dec 12, 2011 12:43 pm

Thanks for the reply.

I must admit, I am liking this bike more and more each day. In comparison to my last project, my Buell, unfortunately even the damn screws were hard to come by, and expensive (... and had to go through harley). Everything for this bike is so affordable and easy to find. So much more fun to work on knowing that I can concentrate on fabrication and engine work and not have to search endlessly for hard to come pricey parts.

Looks like I will have no problem finding some good headers.

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pierce
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Re: Just bought 78 GL1000. Now what?

Postby pierce » Sat Dec 24, 2011 7:52 pm

how would I test my radiator fan to see if it is working? I would like to make sure that when I run the bike it won't over heat. I have replaced all the hoses, flushed the radiator all while changing out my belts but I suspect it might not be working.

Is there a way that I can test it while it is on the bike?

Thanks!

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Fred Camper
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Re: Just bought 78 GL1000. Now what?

Postby Fred Camper » Sat Dec 24, 2011 11:24 pm

A pressure test will show if the radiator leaks. You can either buy a kit to do it or use a fat tire inner-tube and some clamps if you feel handy. If it holds pressure, then if it flows coolant and the fins are not all buggered up you should be all set. The water pump would be a more common issue.

And there is a lot of thermal mass in the coolant system on a wing, it would not overheat in 5 minutes unless at very high load. Certainly you can tell during idling and not risk damaging the engine. But do be sure your coolant gauge works or have a hand held infrared unit handy.

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pierce
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Re: Just bought 78 GL1000. Now what?

Postby pierce » Sun Jan 01, 2012 4:15 pm

Thanks so much for your help. I tested the fan and radiator and pump, and all is fine.

My front brake light is not working. The rear works just fine. Any ideas? I guess I will trace the wires and see what I can find for now.

Thanks

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D2D
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Re: Just bought 78 GL1000. Now what?

Postby D2D » Sun Jan 01, 2012 7:39 pm

Check to be sure all wiring from the front brake switch back is connected and grounded. If so, then replace the small switch under the right control/brake lever module .. they look like this -->
Attachments

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Fred Camper
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Re: Just bought 78 GL1000. Now what?

Postby Fred Camper » Sun Jan 01, 2012 9:28 pm

Just recall that there is no other GL retailer that gets a worse rating that Sabre Cycle. Check out the reviews first before ordering from that source. There are many other sponsors that support the Goldwing forums like Cascade, Crescent Moon, SCI and CyclePsycho to just name a few.

I believe that 1978 is the first year that the front brake switch appeared on the front master cylinder. My 1977 had it on the front brake splitter low on the fork. The switch is the less likely trouble spot in my opinion, as the wiring has several spots where connectors might be loose. So do a simple continuity check on the switch, and if proves functional then move on to trace the wiring from the switch to the main wiring. The switch needs a ignition 12V signal on one of the two pins when the ignition is keyed on. So if the switch has power and continuity (can get the power to the other terminal when the front brake is squeezed), then you are just tracing the wire that goes back to the tail lamp. You know that wire is okay from the point where the rear master ties into the circuit, so just the connections and wire in between need to be reviewed.

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D2D
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Re: Just bought 78 GL1000. Now what?

Postby D2D » Sun Jan 01, 2012 11:04 pm

re: sabre; I wasn't recommending he buy from them, just happened to be the largest and clearest picture of the 78 front brake switch I found when doing a Google search. If the person he bought his wing off of was anything like the guy I got mine from, I'd be willing to bet the switch is missing altogether.

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pierce
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Re: Just bought 78 GL1000. Now what?

Postby pierce » Wed Jan 04, 2012 1:58 pm

Ok, switch is broken. I think I will order Randakks new master cylinder and take care of two birds with one stone. Was going to rebuild the master cylinder as it looks pretty bad, and badly painted black for some reason as well (which is half bubbling off). That way I can take care of the brake light and the master cylinder at the same time.

New problem - went to change fork oil and those top ends just won't budge. Tried with all my might, including once with a bar attached and I think I would end up stripping the top before it came loose. Would like to get in there if possible, any ideas? Is there an alternate way to get the fluid into the forks so I can leave the top be?

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Fred Camper
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Re: Just bought 78 GL1000. Now what?

Postby Fred Camper » Wed Jan 04, 2012 6:48 pm

Did you loosen the top clamp? It holds onto the cap too.

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pierce
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Re: Just bought 78 GL1000. Now what?

Postby pierce » Wed Jan 04, 2012 9:43 pm

Thanks Fred, now I officially feel like an idiot. Fork oil changed. Glad I didn't continue to torque those things.

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Fred Camper
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Re: Just bought 78 GL1000. Now what?

Postby Fred Camper » Thu Jan 05, 2012 7:27 am

Oh dear, that makes me one too as I made that mistake the first time also. It is not very obvious, so your status is well above your personal rating.

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pierce
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Re: Just bought 78 GL1000. Now what?

Postby pierce » Sat Jan 07, 2012 6:24 pm

Finally fired it up today after charging the battery and it fired right up. It had a few hiccups but after warm seemed ok so I took it for a very short ride around a parking lot. After it settled into things everything seemed good. I think it needs to be ridden a lot.

However, one thing I did notice was that when I took the choke off the idle never dropped! When I synced the carbs I did increase the idle a bit, so is it possible that the sea foam is helping to work some of the kinks out with the carbs so when they are set insanely high (2.5K - its racing!)? When I shut it off it backfired as well. Could this be due to the idle set improperly and the unburnt fuel ignites when I turn it off?

Any advice would be appreciated.

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pierce
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Re: Just bought 78 GL1000. Now what?

Postby pierce » Sat Jan 07, 2012 6:26 pm

Forgot to mention, I am running A LOT of sea foam through it right now hoping to clear up the carbs.

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Fred Camper
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Re: Just bought 78 GL1000. Now what?

Postby Fred Camper » Sat Jan 07, 2012 6:59 pm

Seems like you should check out the spark plugs after some extended riding, at least 50 miles. You may be a bit rich, but too early to take any action without getting the idle jets set and the carbs balanced.




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