Suzuki RMX 250S - Motorcycle Specifications Review. It's been some time since we here at Trail Rider had a chance to swing a leg over Suzuki's championship-winning RMX. Quite frankly, since the RMX has remained largely unchanged since its 1989 debut, it was hard to get excited about yearly refinements and BNGs. Suzuki RM 250 Specifications | It Still Runs The 2005 Suzuki RM 250 is available in yellow. The body weighs in at 211 pounds with no fluids, including oil and fuel. The drivers seat is 34 inches at the lowest setting. The 2005 RM 250 is 50 inches in height and 85 inches in length with a ground clearance of almost 14 inches. The wheelbase on the 2005 RM 250 measures almost 58 inches.