Very loud REX - does a Motor Bike Silencer work?

[alex29a]

walking around with the i3 Rex running, the motorbike engine is certainly loud enough to draw attention and annoy.
If one drives past me, I would look around expecting what noisy bike.
It would be interesting to know if anyone has researched into, or tried out fitting it with a suitable motorbike exhaust Silencer?

 

[SuperPoly]

Were you able to try a different REx car? I suspect the first one had a problem.

 

[alex29a]

Were you able to try a different REx car? I suspect the first one had a problem.

I note , they are all noisy ( outside the vehicle) so, it would be perfect if a silencer can work.

 

[Anonymous]

The REx already has a muffler/silencer on it, this is a picture of it.