Suspension Oscillation/vibration Around 50-55mph

[dustino]

Interesting thing I've noticed on my new Scrambler 1200 XE. When cruising around 50-55mph, I feel a suspension vibration almost like a pendulum - every second it gives a brief 1/2 vibration like I rode over some small bumps. At first, I thought maybe it was just the road, but I've felt it on so many different roads I think this is actually something with the suspension, unless I'm going crazy.

Any ideas? I have my break-in service in 2 weeks and wanted to see if I could get some ideas on what it could be. I've never experienced this on another bike, nor full-suspension mountain bikes so it is odd.

Perhaps tires just out of balance, but why would it oscillate and not be consistent? Ie, perfectly smooth...1 second later....VvVvVv....perfectly smooth...1 second later.... VvVvVv... pretty much continuously.

If it's just the tires I'll feel stupid and will gladly wear the dunce cap here for a while.

 

[Vector]

Maybe not suspension? Could the motor be missing?

 

[solomon]

If there's a tacho, note the revs. Try riding same revs in all gears. Also same revs uphill, flat. And same 50-55 in another gear. Pull in clutch when it happens, see if it still does it. As vector said, that would help see if it's engine related.

 

[Vector]

I am not a fan of ride by wire throttles. My Rocket in Street mode has a flat spot just off of idle, it has caused me to stall starting from a stop a few times. In Sport mode there is no flat spot. If the Scrambler has multiple riding modes, try a different mode.

 

[dustino]

Well, I did about an hour of riding yesterday and felt the vibration only a few times. Pulling in clutch didn't seem to do anything different and I'd still feel it around 45 mph. However, all the riding yesterday and I didn't notice it as much. Maybe I'm going crazy. Break-in service is scheduled for next week so I'll talk to the shop about it and have them check things out too. Thanks for all the ideas.

 

[Cablemouth]

Have you noticed if the forks move back and forth during the oscillation?
I had a similar problem with a Bmw gs turns out the front wheel was out of round. It was in balance but at A certain speed the suspension couldn’t keep up with the out of roundness and it would shutter on and off. I’m just assuming you have a spoked wheel.

 

[Billyballer]

Interesting thing I've noticed on my new Scrambler 1200 XE. When cruising around 50-55mph, I feel a suspension vibration almost like a pendulum - every second it gives a brief 1/2 vibration like I rode over some small bumps. At first, I thought maybe it was just the road, but I've felt it on so many different roads I think this is actually something with the suspension, unless I'm going crazy.

Any ideas? I have my break-in service in 2 weeks and wanted to see if I could get some ideas on what it could be. I've never experienced this on another bike, nor full-suspension mountain bikes so it is odd.

Perhaps tires just out of balance, but why would it oscillate and not be consistent? Ie, perfectly smooth...1 second later....VvVvVv....perfectly smooth...1 second later.... VvVvVv... pretty much continuously.

If it's just the tires I'll feel stupid and will gladly wear the dunce cap here for a while.

Chain tension or bad chain link?
Air pressures
Dragging brake?

 

[Gear1]

2018 T100 Bonneville. Same issue. Pirelli tire out of round; replaced tires with Avon Storm. Much improved. Still a tiny bit of harmonic bounce at the 45-50 mph in the front wheel because of a small bit of runout in the wire wheel, but very tolerable.
Craig

 

[shanered6]

Yes I would say it was tyres or wheels and depending on the temps it will be worse or better at a different speed .
But I suppose it could be the motor running in and resonating till it starts to slacken off ?

 

[Valpo Mike]

I had a similar issue on my 19 XE1200. Mine ended up being an out of round front tire .