Suzuki DR750S Big
 | |
| Manufacturer | Suzuki |
|---|---|
| Also called | DR 750 S Big |
| Production | 1987 |
| Engine | Four stroke, single cylinder, SOHC, 4 vaves |
| Compression ratio | 105 x 84 mm |
| Top speed | 168.1 km/h / 104.5 mph |
| Ignition type | Electronic, Suzuki PEI |
| Sparkplug | NGK DPR9EA-9 |
| Battery | 12V 50.4kC, 14Ah |
| Transmission | 5 Speed |
| Suspension | Front: 38mm Telescopic, coil spring, air damped Rear: Full floater rising-rate monoshock with adjustable preload. |
| Brakes | Front: Single 280 mm disc, 2 piston caliper Rear: 160 mm Drum |
| Front Tire | 90/90-21 54S |
| Rear Tire | 130/80-17 65S |
| Wheelbase | 1505 mm / 59.3 in |
| Seat height | 876 mm / 34.5 in |
| Weight | 175 kg / 389 lbs (dry), 195 kg / 430 lbs (wet) |
| Fuel capacity | 29 Litres / 7.7 US gal / 6.4 Imp gal |
| Turning radius | 2.3 m / 7.5 ft |
| Manuals | Service Manual |
| Tech Specs · Brochures · Reviews · Ads · Videos | |
It could reach a top speed of 168.1 km/h / 104.5 mph.
Engine
The engine was a Air/oil cooled cooled Four stroke, single cylinder, SOHC, 4 vaves. The engine featured a 105 x 84 mm compression ratio.
Drive
Power was moderated via the Wet, multi-plate.
Chassis
It came with a 90/90-21 54S front tire and a 130/80-17 65S rear tire. Stopping was achieved via Single 280 mm disc, 2 piston caliper in the front and a 160 mm Drum in the rear. The front suspension was a 38mm Telescopic, coil spring, air damped while the rear was equipped with a Full floater rising-rate monoshock with adjustable preload.. The DR750S Big was fitted with a 29 Litres / 7.7 US gal / 6.4 Imp gal fuel tank. The bike weighed just 175 kg / 389 lbs. The wheelbase was 1505 mm / 59.3 in long.
Photos
Overview
Suzuki DR 750S Big
No standard bike has the larger cylinder
displacement than DR Big. The engine is although narrower than any twin offroad
engine. The enormous single suits well for those who think twins are too clumsy
and need more power than the smaller singles can offer. Naturally, no large
single cylinder like low. But slow cruising with the highest gear is not what DR
Big was meant to. Thats the limitation you have to live with if you buy a DR
Big.
No, DR Big is a bike for riders who dont want to ride fast, and not just on the tarmac. DR Big is a mass production model of the DR-Z, rode by Gaston Rahier at the Paris-Dakar rally If you have long legs, the form of the gasoline tank could make your life a bit miserable. You knees simply wouldnt fit into the sunken tank sides. The problem was solved in 1991 years model when the gasoline tank was totally redesigned.
DR800 replaced the DR750 in 1990. The engine got six mm longer stroke (the bore
was unchanged 105 mm), the cylinder displacement increased from 727 cc to 779
cc. Otherwise it was still just about the same bike.
DR Big saw a major update in 1991. The gasoline tank was decreased with five Litres , now being only 24 Litres . The form of the tank was also new; the scooping on the sides of the tank was made wider for riders with long legs. The saddle was wider and more comfortable and even the suspension was upgraded.
For being a large offroad bike the DR Big has always had an unusually well balanced suspension and long suspension travel. You can actually take it for a spin on a cross circuit without risking a heart attack.
The models before 1991 are the best choice for really long distances with their enormous gasoline tank and the possibility of getting lots of packing with you. The exhaust was placed relative low that makes it possible for fastening saddlebags without risking burning them up. On the other hand, the saddle is not that comfortable on the older models.
Although the models after 1991 were more comfortable and perhaps better looking, the new exhausts (now two pipes instead of one) were not as practical and even raised the weight balance.
| Make Model | Suzuki DR 750S Big |
|---|---|
| Year | 1987 |
| Engine Type | Four stroke, single cylinder, SOHC, 4 vaves |
| Displacement | 727 cc / 44.4 cu in |
| Bore X Stroke | 9.5:1 |
| Compression | 105 x 84 mm |
| Cooling System | Air/oil cooled |
| Lubrication System | Wet sump |
| Induction | 33 mm Mikuni BST 33 SS carburetors |
| Ignition | Electronic, Suzuki PEI |
| Starting | Electric |
| Battery | 12V 50.4kC, 14Ah |
| Spark Plug | NGK DPR9EA-9 |
| Max Power | 37 kW / 50 hp @ 6800 rpm (rear tyre: 34.1 kW / 45.7 hp/6500 rpm ) |
| Max Torque | 55 Nm / 5.6 kgf-m / 40.6 lb-ft @ 5600 rpm |
| Clutch | Wet, multi-plate |
| Transmission | 5 Speed |
| Primary Reduction Ratio | 1.937 (62/32) |
| Gear Ratios | 1 st 2.461 (32/13) / 2nd 1.578 (30/19) 3rd 1200 (24/20) / 4th 0.956 (22/23) / 5th 0.800 (20/25) |
| Final Reduction Ratio | 3.200 (48/15) |
| Final Drive | Chain, DAIDO DID520VL2, 116 links |
| Front Suspension | 38mm Telescopic, coil spring, air damped |
| Front Wheel Travel | 240 mm / 9.4 in |
| Rear Suspension | Full floater rising-rate monoshock with adjustable preload. |
| Rear Wheel Travel | 220 mm / 8.7 in |
| Front Brakes | Single 280 mm disc, 2 piston caliper |
| Rear Brakes | 160 mm Drum |
| Front Tire | 90/90-21 54S |
| Rear Tire | 130/80-17 65S |
| Caster | 39° |
| Trail | 138 mm / 5.4 in |
| Steering Angle | 43° |
| Turning Radius | 2.3 m / 7.5 ft |
| Dimensions | Length: 2270 mm / 89.4 inWidth: 925 mm / 36.4 in Height: 1310 mm / 51.6 in |
| Wheelbase | 1505 mm / 59.3 in |
| Ground Clearance | 262 mm / 10.3 in |
| Seat Height | 876 mm / 34.5 in |
| Dry Weight | 175 kg / 389 lbs |
| Wet Weight | 195 kg / 430 lbs |
| Fuel Capacity | 29 Litres / 7.7 US gal / 6.4 Imp gal |
| Consumption Average | 5.9 L/100 km / 17 km/l / 40 US mpg / 48 Imp mpg |
| Braking 60 Km/h - 0 | 14.3 m / 46.9 ft |
| Braking 100 Km/h - 0 | 42.0 m / 137.8 ft |
| Standing ¼ Mile | 13.6 sec / 151.2 km/h / 94 mph |
| Top Speed | 168.1 km/h / 104.5 mph |
| Road Test | Adventure Group Test Motosprint 1988 Adventure Group Test Motosprint 1989 |