Suzuki GS250FW

From CycleChaos
Revision as of 01:55, 10 November 2019 by Bob6721 (talk | contribs) (adding recommended_oil)
Jump to navigation Jump to search
Suzuki GS250FW
Also called GS 250 FW
Production 1983
Class [[:Category:Standard motorcycles|Standard]] [[Category:Standard motorcycles]]
Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder
Compression ratio 12.5:1
Ignition Digital
Transmission 6 Speed
Suspension Front: 38 mm Telescopic forks
Rear: Swinging arm
Brakes Front: Single 300mm disc
Rear: Single 230mm disc
Front Tire 110/70 -17
Rear Tire 140/70 -17
Wheelbase 1410 mm / 55.5 in
Weight 158 kg / 348 lbs (dry),
Recommended Oil Suzuki ECSTAR 10w40
Manuals Service Manual


The engine was a Liquid cooled cooled Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder. The engine featured a 12.5:1 compression ratio.


It came with a 110/70 -17 front tire and a 140/70 -17 rear tire. Stopping was achieved via Single 300mm disc in the front and a Single 230mm disc in the rear. The front suspension was a 38 mm Telescopic forks while the rear was equipped with a Swinging arm. The bike weighed just 158 kg / 348 lbs. The wheelbase was 1410 mm / 55.5 in long.


Suzuki GS250FW


Every once in a while, some motorcycle company decides to find the smallest engine displacement that can be divided into four cylinders. Honda did it in 1973 with the CB350F, Benelli responded a few years later with its 250 Quattro, and now there is the Suzuki GSX250FW. Suzuki's little Four is a technical marvel of sorts. The four-stroke, double-cam, liquid-cooled, 249cc mini-motor has 44mm pistons traveling through a 41mm stroke. Just how big is a 44mm piston? Three of them could fit into a [[Honda XL600]] cylinder without touching each other or the cylinder wall. But even engineers hell-bent for miniaturization couldn't bring themselves to put four itsy-bitsy valves in a space well under two inches in diameter, so the GSX makes do with two valves per cylinder.

The rest of the motorcycle is more normally sized, scaled-down to about 90 percent of a typical 550. Shorter people fit it best, but even a six-footer isn't cramped. The styling, which is reminiscent of an '83 Suzuki GS750SD, is only medium-sporty rather than effecting the pure racing look that is typical of the hot-rod 250s sold in Japan.

That's okay, for this 250 doesn't pretend to be a pure sportbike. It can't. First, it weighs 398 pounds with a half-tank of gas; that's 30 pounds more than Suzuki's own 400cc GSX-R, and 70 pounds more than the two-stroke 250s. Second, the tiny, high-tech Four simply doesn't put out much power. Suzuki claims 36 horsepower at 11,000 rpm, which is substantially below the 45 bhp the two-stroke street racers all make. The non-impressive power-to-weight ratio of the GSX leads to non-impressive performance, as indicated by its mid-16-second quarter-mile. The GSX feels particularly gutless when pushed hard,requiring high revs without accelerating very briskly in return. On the other hand, the GSX250 is a sophisticated, scaled-down sport-tourer for the rider not in a great hurry. It will eventually reach speeds of 90 mph or more on the open road, so it's adequately fast there. When not asked to accelerate hard, the Suzuki loses its gutless feel, and the engine is as about as velvety smooth as anything with reciprocating parts can be. The chassis, which is far ahead of the engine no matter how the bike is ridden, delivers quick steering with big-bike stability. The seat is well-shaped and padded, and the bars and footpegs placed for long-range comfort. All in all, the GSX is the luxury 250 that offers four-cylinder looks and feel in the smallest Japanese multi yet.


Make Model Suzuki GS 250FW
Year 1983
Engine Type Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder
Displacement 249 cc / 15.2 cu in
Bore X Stroke 44 x 41 mm
Compression 12.5:1
Cooling System Liquid cooled
Induction 4 x 29 mm Mikuni carburetors
Ignition Digital
Starting Electric
Max Power 26.8 kW / 36 hp @ 14000 rpm
Max Torque 20 Nm / 2.1 kgf-m / 14.8 lb-ft @ 13000 rpm
Transmission 6 Speed
Final Drive Chain
Front Suspension 38 mm Telescopic forks
Rear Suspension Swinging arm
Front Brakes Single 300mm disc
Rear Brakes Single 230mm disc
Front Tire 110/70 -17
Rear Tire 140/70 -17
Dimensions Length: 2045 mm / 80.5 in Width: 735 mm / 28.9 in Height: 1240 mm / 48.8 in
Wheelbase 1410 mm / 55.5 in
Dry Weight 158 kg / 348 lbs