Can't work this out....


Information and questions on GL1200 Goldwings (1984-1987)
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Psycheonabike
Posts: 200
Joined: Sun Feb 10, 2019 5:00 am
Location: England UK
Motorcycle: 1985 Aspencade

Can't work this out....

Post by Psycheonabike »



Hi, 1985 Aspy. I've plenty of work to do including carbs but she's riding 90% ok at the moment.

However, she is sooooo bumpy! I thought it might be carbs or coils but even on flat roads with the clutch in cruising it feels like I am on an uneven surface. I set the air suspension to default for one up and I (think) it may have helped but I may have imagined that!! :?

Other than bearings (which feel ok in wheels and steering) can you give me some ideas 're what to check?

Thanks!!

Tony



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Aussie81Interstate
Posts: 1178
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Location: Penrith Australia
Motorcycle: 2001 GL1500F6C Valkyrie
1982 CX500 Turbo (Historic registration - finally)
1981 GL1100 Interstate (sold)
1988 GL1500 (sold)

Re: Can't work this out....

Post by Aussie81Interstate »

Possible flat spots in the tyres, tyres out of balance, buckled rims. There are a few starters for you to check.

Psycheonabike
Posts: 200
Joined: Sun Feb 10, 2019 5:00 am
Location: England UK
Motorcycle: 1985 Aspencade

Re: Can't work this out....

Post by Psycheonabike »

Aussie81Interstate wrote:
Tue Feb 19, 2019 4:08 pm
Possible flat spots in the tyres, tyres out of balance, buckled rims. There are a few starters for you to check.
Blimey....they're drastic 😨

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Aussie81Interstate
Posts: 1178
Joined: Thu Nov 27, 2014 2:34 am
Location: Penrith Australia
Motorcycle: 2001 GL1500F6C Valkyrie
1982 CX500 Turbo (Historic registration - finally)
1981 GL1100 Interstate (sold)
1988 GL1500 (sold)

Re: Can't work this out....

Post by Aussie81Interstate »

Not really that drastic,

They are simple checks you can make just by getting the front then rear wheels off the ground (one at a time), then do a visual inspection - you should be able to check if the rims are buckled just by looking at them while spinning, then for bald/wear spots - the same thing. If the bike has been sitting on the side stand for any length of time before you purchased the bike - the tires may have been deflated a bit and they have developed a "set" which could improve with more riding. What is the age of the tyres ?

If tyres are out of balance - they can be balanced quite easily as well.

Any history or maintenance you know of on the bike - always helps a bit

good luck with it :)

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Aussie81Interstate
Posts: 1178
Joined: Thu Nov 27, 2014 2:34 am
Location: Penrith Australia
Motorcycle: 2001 GL1500F6C Valkyrie
1982 CX500 Turbo (Historic registration - finally)
1981 GL1100 Interstate (sold)
1988 GL1500 (sold)

Re: Can't work this out....

Post by Aussie81Interstate »

Could also be suspension as in front or rear shocks....is it a "harsh" feeling coming through the handlebars when you ride and hit a bump or something different... I also presume "bumpy" to be the road surface ??

So the motor is running fine? idling easily?

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Maz
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Location: Kent, UK
Motorcycle: 1975 GL1000K1
1976 CB500T
1979 CB750L
1990 Yamaha FJ1200
1993 Suzuki GS500E

Re: Can't work this out....

Post by Maz »

Fork 'stiction' is another possibility. Had this on my cb 750. The forks seem to be doing their job ok when you push down on them when stationary and when riding over larger bumps, but the problem shows up when riding over less bumpy roads. There is an initial bit of sticking/friction that the smaller bumps can't overcome, so it feels a bit like you have solid forks. Various causes/checks, including loosening all of the nuts and bolts attached to the front end, pumping the forks up and down a few times, then re-tightening in the correct order. Stripping the forks for a thorough cleaning/examination of all components, etc.
Of course this may not be your problem, but worth a try.

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

Psycheonabike
Posts: 200
Joined: Sun Feb 10, 2019 5:00 am
Location: England UK
Motorcycle: 1985 Aspencade

Re: Can't work this out....

Post by Psycheonabike »

Aussie81Interstate wrote:
Tue Feb 19, 2019 9:20 pm
Could also be suspension as in front or rear shocks....is it a "harsh" feeling coming through the handlebars when you ride and hit a bump or something different... I also presume "bumpy" to be the road surface ??

So the motor is running fine? idling easily?
Thanks....but that's when I noticed the bump wasn't due to road as its there on smooth tarmac too. Yes idles well too.

Psycheonabike
Posts: 200
Joined: Sun Feb 10, 2019 5:00 am
Location: England UK
Motorcycle: 1985 Aspencade

Re: Can't work this out....

Post by Psycheonabike »

Maz wrote:
Wed Feb 20, 2019 3:30 am
Fork 'stiction' is another possibility. Had this on my cb 750. The forks seem to be doing their job ok when you push down on them when stationary and when riding over larger bumps, but the problem shows up when riding over less bumpy roads. There is an initial bit of sticking/friction that the smaller bumps can't overcome, so it feels a bit like you have solid forks. Various causes/checks, including loosening all of the nuts and bolts attached to the front end, pumping the forks up and down a few times, then re-tightening in the correct order. Stripping the forks for a thorough cleaning/examination of all components, etc.
Of course this may not be your problem, but worth a try.

Maz
Thanks man.... that might be on the cards!



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