Rhythmic vibration at speeds above 80mph

[pjuk]

I’m out in Europe for the week and it was something I noticed earlier in the year. At speeds above 80mph there is a rhythmic vibration in the car which increases with speed. It’s about 1-2 seconds of mild vibration, then no vibration for a similar period. At around 90-100mph the vibration is almost constant but not as noticeable I guess due to road noise and general vibration. When I had it in an SC earlier in the year for a minor issue they said nothing my was wrong. Any thoughts? It’s a 2019 pre-raven MX. Thanks

 

[Avendit]

Sounds like wheel balance or alignment? Certainly where I would start.

 

[Adopado]

Sounds like wheel balance or alignment? Certainly where I would start.

Yes that’s the first thought but I’m thinking that those causes would result in a continuous vibration rather than just for a couple of seconds then a pause then repeat.

 

[pdk42]

Does the period of the vibration change with speed?

 

[Avendit]

Does the period of the vibration change with speed?

Or can it be made to vary at all, or is it like it's on a timer? The S doesn't vibrate the steering as a warning for anything does it?

 

[pjuk]

The frequency of the on/off vibration varies with speed (higher the faster you go) and almost becomes a permanent vibration at 100+. It’s not heavy and quite mild. I’ll check at my local tyre shop when I’m back in the UK for alignment or imbalance in the tyres.

 

[Somex]

Sounds like wheel balance or alignment? Certainly where I would start.

I beg to differ
I’d start by checking that no one had left a sex toy in the car
Say a lot about me and the previous occupants of my car I guess

 

[pdk42]

The frequency of the on/off vibration varies with speed (higher the faster you go) and almost becomes a permanent vibration at 100+. It’s not heavy and quite mild. I’ll check at my local tyre shop when I’m back in the UK for alignment or imbalance in the tyres.

It’s got to be tyres, or bearings, or transmission then. There, that’s narrowed it down!