SumoSpring noise

[ScooterPunk13]

I just installed a set of blue SumoSprings and get a hollow popping sound when I sit bumps, is this normal or is there a possible install issue?

Sponsored

 

[ATGC]

I've had the same SumoSprings for 2 years, never noticed any sound coming from them. I really like them for towing.