This is the 12356th most frequent Polish word.
motorowych
"Motorowych" means "motorized" or "relating to motors" in English.
Here, 'motorowych' is an adjectival form related to motorcycles or motors, qualifying 'części' (parts).
Sklep oferuje różnorodne części motorowych.
The shop offers various motorcycle parts.
In this case, 'motorowych' relates to traffic, specifically describing the type involving motorcycles.
Ostatnio obserwuję rosnący ruch motorowych na drogach.
Lately, I observe an increasing motorcycle traffic on the roads.
'Motorowych' here modifies 'modele' (models), describing items related to motorcycles from historical periods.