1100 vibrations & action camera

Honda Pan-European 1st generation (German design)

1100 vibrations & action camera

Postby roger » 31 Jul 2016, 23:46

I tried to mount an action camera on the bike, but results were a disaster as the bike was 'bouncing' and I had vibrations through the 'bars when solo. It was something that had been building up for a while, but when towing the loaded trailer with wife and lots of weight on board, the problem was easy to ignore. Anyway, I started on the usual list of cures.

I removed the trailer hitch (attached to the footplates) - no improvement.
The front wheel was re-balanced - insignificant change.
Front fork oil was changed for 7.5w (from 5w) - an insignificant change and a harsher ride.
Head bearings were adjusted - an improvement, but still not right.
Engine mounts were re-torqued and exhaust shields adjusted - a marginal improvement.
Though the spark plugs were ok, the resistance in the left side HT circuit was very high. Two suppressor caps were changed and a carb balance needed an insignificant adjustment - with an insignificant improvement.
The last thing was to lower the level of the engine oil - something I didn't quite believe would work - but of course it did!

For comfort, I plan to revert back to 5w fork oil and will fit new head bearings sometime in the future. It's not the crank causing the vibration - that would cause a lot of bother - so, it'll be something else to do with the clutch and drive. I don't really care! - I'm just glad to get the bike back to normal. Maybe I'll manage to take some video now!
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Re: 1100 vibrations

Postby Uncle Phil » 01 Aug 2016, 01:25

You might check your carb sync also.
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Re: 1100 vibrations

Postby roger » 01 Aug 2016, 15:22

Uncle Phil, I did a carb balance after I'd changed the plug caps '...with an insignificant improvement...' One thing I didn't mention was that I'd added a dose of carb cleaner to a fresh tank of fuel before I got round to remove any plastic. The engine was a little smoother after that...

The same stuff did wonders for my car... :)

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Re: 1100 vibrations

Postby Uncle Phil » 01 Aug 2016, 22:00

Which says they must have been pretty close to right. But it can cause some vibrations if they are off.
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Re: 1100 vibrations

Postby roger » 02 Aug 2016, 15:16

Uncle Phil, - Oh, yes! I've had the bike from new - it's an old friend - which is why it had me going for a while.

I see I'm 'older' than you by 6 days!

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Re: 1100 vibrations

Postby Uncle Phil » 02 Aug 2016, 17:53

Roger - It's not the age, it's the mileage .... :D
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Re: 1100 vibrations

Postby roger » 02 Aug 2016, 21:27

No arguement there, Uncle Phil. :D
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Re: 1100 vibrations

Postby David W » 06 Aug 2016, 02:52

Roger and all,

Some people put sand, or other weighty material, inside their ST1100 handlebar. (But they might find their bike is more top-heavy then.)

And if yours is designed to be an action camera, you might look into alternative ways to mount it, such as on your own chest, or on your helmet. (There are also "dash cameras" which might be less prone to vibration; I've never tried one.)

roger wrote:... The last thing was to lower the level of the engine oil - something I didn't quite believe would work - but of course it did! ....
I would be careful doing that!
'Tis not its looks, but how it cooks.
And I've found that most liter size Pans, when warmed up, cook well.
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Re: 1100 vibrations

Postby mbrST1100 » 06 Aug 2016, 08:49

roger wrote:The last thing was to lower the level of the engine oil - something I didn't quite believe would work - but of course it did!

Eliminating fine, high frequency vibes requires some fiddling...
Besides a throughout carb sync and taking care to not overfill engine oil, I'd also check/confirm idle settings + overall mixture with a Colourtune kit.
Only one clogged/obstructed bore in one of the carb-jet nozzles will already cause unbalanced firing of the cylinders in a particular rev/torque range...
I'd also check that the throttle cables have a few millimetres of slack and are not under constant tension.

Mentioned resonance is not only distorting your video footage beyond levels any post-production stabilizer/correction could handle, it can also be destructive on the PCBs of your equipment; can lead to things like hairline fractures in soldering spots and conducting film, prongs inside connectors or the SDcard reader rubbing through the gold plating, etc...
I've seen top heavy components like capacitors or thyristors been rattled out their soldering on car-stereo PCBs...

But we're complaining on a high level here, imagine you're on some sort of cruiser or a dual-sport like a KTM, which rattles would simply disintegrate your delicate electronics in no time 8-)
Keep tires down, ATGATT, STOC# 637 (Sept.'97), PanEuro# 42 (Oct.'97), candy glory red '92 (sold), re-furbed '94 (wicked), strawberry '00 (daily)
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Re: 1100 vibrations

Postby alans1100 » 06 Aug 2016, 11:17

I don't get any vibrations from my 1100 but I do get issues with vibration as the bike travels along the road. More to do with our wonderfully maintained (not) roads than anything else.

The length of the mounting hardware can also cause issues so the closer the cam is to the actual stick/bolt on mounting surface the better. I do use a helmet mount sometimes but much prefer the cam mounted on the bike. Cam on the helmet I mainly keep for city use as there's more traffic etc. to worry about.

I'm thinking of getting one of these to use as they seem to cut out vibrations from quad copters. Might work if I mount it on the dash shelf but I need a new screen before I go there.

http://www.ebay.com.au/itm/172105945622 ... EBIDX%3AIT
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