GL1200A Problems and Brake Discs/Brake Rotors


Information and questions on GL1200 Goldwings (1984-1987)
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daryooshers
Posts: 6
Joined: Sun Apr 04, 2021 11:55 am
Location: United States
Motorcycle: 1984 Honda GL1200A Aspencade

GL1200A Problems and Brake Discs/Brake Rotors

Post by daryooshers »



Hey all,

I've had my '84 Aspencade for just a couple weeks now, and it's time to do the work on it. Some things that need doing are as follows:

- Handlebar radio control connections are sketchy, i have to fiddle with each button to make it work
- Bike idles high, usually about 1200-1400 rpm depending on the day
- Possibly related: choke control/cable is phishy, doesn't like to move much; throttle is very sticky, you turn it to any position and it just stays put
- Both tires bald
- Front end wobble around 25-30 mph (PO says it may be the tire), fine below and above those speeds
- Front brake and clutch master cylinders appear to leak somehow, maybe one drip appears every 5ish days
- Front brake lever doesn't trigger the brake lights, don't think this is correct
- Clutch likely needs a bleed, PO said something about having issues, and sometimes i do need to pump it to keep the bike from lurching (hopefully its not the actual clutch pack)
- Rear air suspension looses pressure gradually, i'm thinking it's the o-rings on the air lines (otherwise shock rebuild)
- All brake discs/pads should really be replaced

So, I'm wondering if anyone recognizes any of these issues, or if they are common problems with common solutions. Otherwise, I have the Haynes book and i have ample mechanical experience so I'll surely be ok in that regard. I been looking around online at parts diagrams for knowledge and for the parts i may need - tires, rear shock rubber bits, master cylinder rubber bits, and finally brakes.
I am not sure if I will even do the brakes soon (i don't know the wear specs, nor have i measured the discs on the bike, but the discs are visibly worn and there is no shortage of brake dust), but I am wondering what part numbers to get. I have looked for oem or oe equivalent discs but havent found much, so I am wondering if someone could inform me. I'd probably want to replace the pads too, cuz while you're in there, right?

Thanks!


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Goldenponyboy
Posts: 67
Joined: Mon Apr 29, 2019 3:28 pm
Location: vancouver bc
Motorcycle: 1985 gl1200 ltd edition

Re: GL1200A Problems and Brake Discs/Brake Rotors

Post by Goldenponyboy »

daryooshers wrote: Tue Apr 20, 2021 6:12 pm Hey all,

I've had my '84 Aspencade for just a couple weeks now, and it's time to do the work on it. Some things that need doing are as follows:

- Handlebar radio control connections are sketchy, i have to fiddle with each button to make it work
- Bike idles high, usually about 1200-1400 rpm depending on the day
- Possibly related: choke control/cable is phishy, doesn't like to move much; throttle is very sticky, you turn it to any position and it just stays put
- Both tires bald
- Front end wobble around 25-30 mph (PO says it may be the tire), fine below and above those speeds
- Front brake and clutch master cylinders appear to leak somehow, maybe one drip appears every 5ish days
- Front brake lever doesn't trigger the brake lights, don't think this is correct
- Clutch likely needs a bleed, PO said something about having issues, and sometimes i do need to pump it to keep the bike from lurching (hopefully its not the actual clutch pack)
- Rear air suspension looses pressure gradually, i'm thinking it's the o-rings on the air lines (otherwise shock rebuild)
- All brake discs/pads should really be replaced

So, I'm wondering if anyone recognizes any of these issues, or if they are common problems with common solutions. Otherwise, I have the Haynes book and i have ample mechanical experience so I'll surely be ok in that regard. I been looking around online at parts diagrams for knowledge and for the parts i may need - tires, rear shock rubber bits, master cylinder rubber bits, and finally brakes.
I am not sure if I will even do the brakes soon (i don't know the wear specs, nor have i measured the discs on the bike, but the discs are visibly worn and there is no shortage of brake dust), but I am wondering what part numbers to get. I have looked for oem or oe equivalent discs but havent found much, so I am wondering if someone could inform me. I'd probably want to replace the pads too, cuz while you're in there, right?

Thanks!
Hi
For the stereo switches issue. There is a product that you can get at electronics stores called "Deoxit fader" It is meant for switches on big sound engineer boards. It works great on getting the buttons we have on old bikes to work again. It lasts for about half a season and you need to reapply it. Its not cheap but it works like a damn. Bring it to your saturday morning bike meet and pass it around and make friends. It works.
New tires I would go with Shinko tourmasters to get you up and running cheap. The wobble will go away with new tires and getting your air suspension sorted. If I have too much air in the front my bike does crazt speed wobbles at low speed. You can buy a master cylinder rebuild kit from goldwingparts.com. Save yourself the headache and get their longnose c-clip pliers to make the job way easier. You can get the same kit for the clutch and the slave cylinder. The brake light should come on and will just require some mucking around with it.
While you have the back wheel off to do the tire then yes you should do the brakes and get the correct spline lube from your honda store($$$$)
Its a real pain to redo the seals on the back shocks but there is only one seal and you can still get it from your honda dealer unlike some parts for these older bikes. The hardest part is taking alll the bags off the back and then having a buddy hold the rear rack and top case while you pry the shocks off. If your shock tubes are not rusty then it will be worth redoing the seals as opposed to buying new progrssive non air shocks for $250. I like having air shocks.
Good luck.
User avatar
Ohara
Posts: 114
Joined: Mon Nov 16, 2015 9:05 am
Location: Ontario Canada
Motorcycle: 1986 Interstate
1986 Aspencade

Re: GL1200A Problems and Brake Discs/Brake Rotors

Post by Ohara »

Rear brake rotor minimum spec is 6mm. Purchase new one from EBC not cheap but good. Cheapest I have found is from Amazon. Or try ebay for used Honda rotor. Good luck
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