Suzuki GS750 19761978
Suzuki GS750E 19791980
Suzuki GS750L 1979-1980
Suzuki GS750G 19801981
Suzuki GS750GL 1981>
I have tried to tell the history of the different Suzuki
GS750 models on this page.
I would be grateful of any contributions sales brochures, magazine ads,
magazine articles, pictures, specs, facts, corrections etc. Please scan the material
in JPEG format (large enough that all the details are visible) and send
them to me. Please tell me the source and the publication date if possible.
If you send me pictures of your own bike, please follow these
instructions.
|
1976 Suzuki year code: A
Presented in October 1976, GS750 was the the first four-stroke
engined Suzuki motorcycle after 22 years of only 2-stroke engines
from Suzuki. The Colleda 90cc COX was the first, but the model
was discontinued soon after its release in 1954 and after that
Suzuki concentrated in deleveloping great two-stroke machines.
Although Suzuki had earlier been known as the home of two-strokes
and for years let other manufacturors go ahead with their complicated
and not-always-that-reliable four-strokes. Honda presented its
CB750 already in the late sixties being a emmidiate success. Suzuki's
answer, in form of the great new two-strokes in the T and later
in the GT family were great bikes in the early seventies but were
soon hopefully out-of-date. When even the RE5 with rotary engine
turned out to be unsuccesful, it was time for Suzuki to think
again. New harder emission regulations were arriving in the USA
(California) killing the eventual plans of making even more powerful
two-stroke machines. No, Suzuki had to swallow its pride and go
with the flow. The name of the game was four-stroke.
Three four'strokes were introduced in the late '76: GS750, GS550
and GS400. All three of them had similar appearance and specification
other than the GS400 had a cross-mount inline twin, six-speed
gearbox and drum rear brake. The 550cc and 750cc versions had
five speeds and disc brakes front and rear. All GS models had
two valves per cylinder, double overhead camshafts, tubular double
craddle frame, telescopic front and pivoted-fork rear suspension, gear indicator and electric starter.
Suzuki Motor Company started the engineering of the four-stroke
engine already in 1972 (some sources say 1973) and enormous sums
of money was spent in designing a reliable and powerful engines.
Today we know that the efforts paid off, the GS line had great
engines that were durable and also beautiful.
At first the GS750 had a single disc brake at the front and steel
wire wheels, but already in January 1977 the the model was offered with twin
disc at the front. For 1977, 1978 abd 1979 the model was offered in two version, GS750 with wire wheels and single brake disc at the front, and the GS750E with cast alloy wheels and double brake discs at the front. Both models had a single brake disc at the rear wheel.
From the beginning the model had 5-speed gearbox,
electric starter and 12V electric system with conventional battery
and coil ignition (the CDI ignition wasn't introduced until to
the GS750 until with the 16 valve models a couple of years later).
The front suspension was conventional coil and oil-damped telescopic
front fork, the rear suspension also conventional oil-damped swingarm
with self-adjusting rear suspension. The swing arm had roller
bearings instead of the bushings like in most other motorcycles,
for durability.
The GSX750 engine with 65.0 mm bore and 56.4 mm stroke delivered
6372 hp, depending on the export country. Even the restricted
versions (for West-Germany etc.) were powerful enough to give
the GS750 a top speed of 200 km/h, making the GS750 faster than
any other Japanese motorcycle in 1976.
|
1976 Suzuki GS
750
Overall Length: 2 225 mm (87.6 in)
Overall Width: 855 mm (33.7 in)
Overall Height: 1 170 mm (46.0 in)
Ground Clearance: 150 mm (5.9 in)
Wheelbase: 1 490 mm (58.7 in)
Dry Weight: 223 kg (492 lbs)
Engine: Air-cooled 748 cc inline-4, DOHC, 8 valves. 72 hp @ 8 500 rpm, 60 Nm @ 7 000 rpm
Click on the image for larger format.
|
1976 Suzuki GS
750
Overall Length: 2 225 mm (87.6 in)
Overall Width: 855 mm (33.7 in)
Overall Height: 1 170 mm (46.0 in)
Ground Clearance: 150 mm (5.9 in)
Wheelbase: 1 490 mm (58.7 in)
Dry Weight: 223 kg (492 lbs)
Engine: Air-cooled 748 cc inline-4, DOHC, 8 valves. 72 hp @ 8 500 rpm, 60 Nm @ 7 000 rpm
Click on the image for larger format.
|
1977 Suzuki year code: B
As already mentioned, the 1977 GS750DB had twin brake disc at
the front, othervise the upgraded version (January 1977) shared
the same specifications with the preview model of the GS750. Officially
1977 was the first model year for the GS750. I only presented
the '76 GS750 because of the lack of the right side front disc.
|
1977 Suzuki GS
750
Overall Length: 2 225 mm (87.6 in)
Overall Width: 855 mm (33.7 in)
Overall Height: 1 170 mm (46.0 in)
Ground Clearance: 150 mm (5.9 in)
Wheelbase: 1 490 mm (58.7 in)
Dry Weight: 223 kg (492 lbs)
Engine: Air-cooled 748 cc inline-4, DOHC, 8 valves. 72 hp @ 8 500 rpm, 60 Nm @ 7 000 rpm
Click on the image for larger format.
|
1978 Suzuki year code: C
The GS750E (the correct model name for the '78 year's model is
GS750EC) with star cast wheels was introduced in February 1978.
The most obvious differences to the earlier model were new type
of wheels. Otherwise the GS750E differed from the GS750 only in
small details.
|
1979 Suzuki year code: N
The '79 GS750E was presented in December 1978 and was the last
one of the eight-valve 750's (except for Japan, see further down
on this page). The GSX750E with a 16-valve engine, released in
January 1980, replaced the GS750E and the model was discontinued
in August 1980. The bikes sold in 1980 were identical with the
1979 year's GS750EN and officially there wasn't any 1980 year's
GS750ET model.
The '79 GS750EN (GS750E-II in Japan) was almost identical with
the '78 year's GS750EC. The only differences I know of was that
the choke handle was moved to the handlebars anf of course the
flashier paintjob.
Here I will remind that the model name was never changed in the
Northern America although the introduction of the 16-valve engine.
For some reason, the X that told about the new 4-valve
cylinder head didn't find its way to the model names in USA and
Canada and all the GSX models (with exception of the GSX-R series)
remined GS over there.
|
1979 Suzuki GS
750 E
Overall Length: 2 225 mm (87.6 in)
Overall Width: 870 mm. (34.3 in.)
Overall Height: 1,170 mm (46.1 in)
Wheelbase: 1 490 mm (58.7 in)
Ground Clearance: 150 mm (5.9 in)
Dry Weight: 223 kg (492 lbs)
Engine: Air-cooled 748 cc inline-4, DOHC, 8 valves. 72
hp @ 8 500 rpm, 60 Nm @ 7 000 rpm
Click on the image for larger format.
|
1979 Suzuki GS
750 E
Overall Length: 2 225 mm (87.6 in)
Overall Width: 870 mm. (34.3 in.)
Overall Height: 1 170 mm (46.1 in)
Wheelbase: 1 490 mm (58.7 in)
Ground Clearance: 150 mm (5.9 in)
Dry Weight: 223 kg (492 lbs)
Engine: Air-cooled 748 cc inline-4, DOHC, 8 valves. 72
hp @ 8 500 rpm, 60 Nm @ 7 000 rpm
Click on the image for larger format.
|
1979 Suzuki GS
750 E 1979
Overall Length: 2 225 mm (87.6 in)
Overall Width: 870 mm. (34.3 in.)
Overall Height: 1,170 mm (46.1 in)
Wheelbase: 1 490 mm (58.7 in)
Ground Clearance: 150 mm (5.9 in)
Dry Weight: 223 kg (492 lbs)
Engine: Air-cooled 748 cc inline-4, DOHC, 8 valves. 72
hp @ 8 500 rpm, 60 Nm @ 7 000 rpm
Click on the image for larger format.
|
Suzuki introduced a custom styled GS750L in 1979. It had same
specifications as the GS750E but had high handlebars, stepped
seat, leading axle front fork, smaller fuel tank (13 l/ 3.4 US
gal) and short cut silencers. Sorry, no pictures available for
the moment. See the 1981 GS750GL picture further down on this
page. The model was sold until 1980 and was discontinued after
the presentation of the 16-valve engined GSX750L.
Seat height: 793 mm (31.2 in), dry weight: 233 kg (514 lbs), 19-inch
front tire, 17-inch rear tire.
|
A nice looking 1979 GS750N, sent by Neil Harding, Middlesbrough, England.
Photographed in Yorkshire, England. |
1980 Suzuki year code: T
The Suzuki GS750 engine lived on in Japan where it wasn't allowed to
sell motorcycles larger than 750 cc piston displacement. Basically
the GS750G was GS850G with a 748 cc engine and different handlebar,
both models were sport tourers with shaft drive. The GS750G was
presented in December 1979.
|
1980 Suzuki GS
750 G
Overall Length: 2 215 mm (87.2 in)
Overall Width: 875 mm (34.4 in)
Overall Height: 1 175 mm (46.3 in)
Wheelbase: 1 490 mm (58.7 in)
Dry Weight: 249 kg (548 lbs)
Engine: Air and oil-cooled 748 cc inline-4, DOHC, 8 valves.
68 ps @ 8 500 rpm, 6.0 kg-m @ 6 500 rpm. Shaft drive. Available
only in Japan.
Click on the image for larger format.
|
1980 Suzuki GS
750 G
Overall Length: 2 215 mm (87.2 in)
Overall Width: 875 mm (34.4 in)
Overall Height: 1 175 mm (46.3 in)
Wheelbase: 1 490 mm (58.7 in)
Dry Weight: 249 kg (548 lbs)
Engine: Air and oil-cooled 748 cc inline-4, DOHC, 8 valves.
68 ps @ 8 500 rpm, 6.0 kg-m @ 6 500 rpm. Shaft drive. Available
only in Japan.
Click on the image for larger format.
|
1980 Suzuki year code: X
Suzuki presented the second and final version of the GS750G in
February 1981. Cosmetic changes only. This was the last model
year for the GS750G.
|
1981 Suzuki GS
750 G
Overall Length: 2 215 mm (87.2 in)
Overall Width: 875 mm (34.4 in)
Overall Height: 1 175 mm (46.3 in)
Wheelbase: 1 490 mm (58.7 in)
Dry Weight: 249 kg (548 lbs)
Engine: Air and oil-cooled 748 cc inline-4, DOHC, 8 valves.
68 ps @ 8 500 rpm, 6.0 kg-m @ 6 500 rpm. Shaft drive. Available
only in Japan.
Click on the image for larger format.
|
The GS750GL was another Japanese home market model with the reliable
eight-valve engine and shaft drive. The design of the GL was obviously
more chopper influenced but mechanically the GS750G and GS750GL
were similar. The model was introduced in May 1981.
I haven't found info of any other model years. It's possible that
the '81 was the only model year for GS750GL. Probably the model
until 1983.
|
1981 Suzuki GS
750 GL
Overall Length: 2 225 mm (87.6 in)
Overall Width: 855 mm (33.7 in)
Overall Height: 1 190 mm (46.9 in)
Wheelbase: 1 510 mm (59.4 in)
Dry Weight: 241 kg (530 lbs)
Engine: Air and oil-cooled 748 cc inline-4, DOHC, 8 valves.
68 hp @ 8 500 rpm, 6.0 kg-m @ 6 500 rpm Shaft drive. Available
only in Japan.
Click on the image for larger format. |
Suzuki GS750 specifications
Overall
length: 2,225 mm (87.6 in.)
Overall width: 870 mm (34.3 in.)
Overall height: 1,170 mm (46.1in.)
Wheelbase: 1,490 mm. (58.7 in.)
Ground clearance: 150 mm (5.9 in.)
Dry weight: 223 kg (492 lbs.)
Fuel tank capacity: 18 l (4.8 gal.)
Reserve: 2 lt. (0.5 gal.)
Engine: Air cooled inline-4, DOHC, 2 valves per cylinder
Bore x stroke 65,0 x 56,4 mm
Piston displacement: 748 cc
Compression ratio/test range: 8.7 :1 / 128171 psi (15 psi var.)
Maximum opwer output: 72 hp @ 8 500 rpm
Maximum torque: 60 Nm/ 7 000 rpm
Carburetors: Mikuni VM26SS x 4
Carburetor settings: 1000 rpm. pilot air 1 1/4 T.
Carburetor float height: 0.981.1 in.
Main/pilot/needle/jet: 105 /22.5 /P-1 /5F21-3
Starter system: Electric and kick start
Lubrication type: wet sump, 3,400 cc. 10W-40 (20W-50) preferred
Oil pressure: 1.42 psi @ 3,000rpm
Clutch type: Wet multi-plate
Transmission: 5-speed
Primary reduction: 2.152 (99/46)
Final reduction: 2.733 (41/15)
Gear ratios:
Low 2.571 (36/14)
2nd 1.777 (32/18)
3rd 1.380 (29/21)
4th 1.125 (27/24)
5th 0.961 (25/26)
Top speed: 125 mph
Drive chain: 630SO 96 link, O-ring .8 - 1.2 in. free-play
Steering angle: 40 degrees
Caster: 63 degrees
Trail: 107 mm (4.21 in.)
Turning radius: 2.6 m (8.5 ft.)
Front brake: Disc
Rear brake: Disc
Front tyre: 3.25H X 19 4pr.
Rear tyre: 4.00H X 18 4pr. 120/18
Ignition type: Battery/coil
Ignition timing: 17° BTDC at 1500 rpm
Points settings: 0,35 mm / .014" point gap
Spark plug type: NGK B8ES
Spark plug gap: .024.028"
Battery: 12V 14AH/10 hr.
Generator: 3 ph. AC
|
More: Suzuki
GS750 brochures & adverts
More: Suzuki
GS750 magazine articles
More: Suzuki
GS750E brochure
More: Suzuki
GS750E adverts
More: Suzuki
GS750G brochures & adverts
More: Suzuki
GS750GL brochures & adverts
More: Suzuki
GS series
More: All
Suzuki models
Sources:
Aki Ainetdin (thanks for scanning photos), several Japanese websites
(can't read or write their names), Michael's
GS Classic, Ron
Hurd's Website (the black '78 GS750E is his bike) etc. |
This free site is managed by Jarmo Haapamäki.
If you find this site helpful, please leave a donation for Jarmo
so you can enjoy the spirit of giving too.
Came here from a search engine?
Click at the home
button below to get to the main page with frames.
|