Metzeler recommends their Lasertecs and Pirelli their Sport Demons both in the 110/90/16 and 130/90/16 sizes for the pre 94 EX500. Either would be a world of difference better handling than the Dunlop OE tires.GMR_RUNNER said:
Your 2.5" wide rear rim is too narrow for a 140/70 rear tire; go with the 130/90, it fits the rim and the bike properly. The Demon should have the edge in handling and the Lasertec the edge in tire life of these two good choices. Don't think you'll find anything better for the EX500 with 16" wheels.