16-09-2021

  • 1978 1979 Yamaha XS750 Owners Manual XS 750 F on Amazon.com.FREE. shipping on qualifying offers. 1978 1979 Yamaha XS750 Owners Manual XS 750 F.
  • The Yamaha XS 750 and Yamaha XS 850 was a line of inline three cylinder motorcycles produced by the Yamaha Motor Corporation from 1976 to 1981 for the worldwide motorcycle market. The last model year of manufacturing was 1981. Released in Japan in 1976 as the GX750 sporting wire wheels (as opposed to cast alloy in all other models) the XS750 became the name for the export model.
  • 1978 Yamaha XS750 Tools & Manuals Mikes XS is the leading destination for Yamaha XS750 Tools & Manuals parts. With a large inventory of vintage Yamaha motorcycle parts and same day shipping in the continental US, we can assure that all your Yamaha XS750 motorcycle needs will be met here.

1978 XS750 “E” and “SE” The now popular “2D” was upgraded to keep up with the market. Yamaha added electronic ignition this year but retained the mechanical timing advancing unit. They also replaced the carburetors for Mikuni “Mark II” CV models. Yamaha XS750 Service Manual This manual is in Adobe Acrobat format (pdf). I realize this is not the most efficient format for graphics, but I think it is the best choice for this particular use due to it's cross platform capabilities and great features. You must have Adobe Acrobat to read these files.

Yamaha XS750
Manufacturer
Also called XS750E, XS 750 E, XS750 US. Custom, XS 750 US. Custom, XS750 Special, XS 750 Special, XS 750
Production 1976 - 1981
ClassStandard
SuccessorYamaha XS850
Engine
in-line three, four-stroke
Bore / Stroke68.0mm x 68.6mm
Compression ratio8.5:1
Top Speed109 mph (175 km/h)
Horsepower67.59 HP (50.4 KW) @ 8500RPM
Air FilterK&N YA-1300 `78-79[1]
Spark PlugNGK BP7ES '76-79
BatteryYUASA YB14L-A2 '76-79
TransmissionGear box: 5-speed
Final Drive: shaft drive (cardan)
Final DriveShaft
SuspensionFront: Telescopic Forks
Rear: Dual Shocks Swing Arm
BrakesFront: dual disc
Rear: single disc
Front Tire3.25-19
Rear Tire4.00-18
Weight 252.0 kg (wet)
Oil Filter K&N KN-146
Recommended OilYamalube 10w-40
Fuel Capacity5.02 Gallon (19.00 Liters)
Competition Honda CB750F
Kawasaki KZ750E
Suzuki GS750
Manuals Service Manual

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The Yamaha XS750 Special was a in-line three, four-stroke Naked motorcycle produced by Yamaha between 1976 and 1981. It could reach a top speed of 109 mph (175 km/h). Claimed horsepower was 67.59 HP (50.4 KW) @ 8500 RPM.

History[edit]

The Yamaha XS 750 Triple Special was produced from 1976 into the 1980s for the worldwide motorcycle market. In the United States, the last model year was 1981.These bikes are usually referred to as 'Triples' because they have 3 cylinders.The first 4 model years the bike displaced 750cc. This was increased to 850cc for the final 2 model years.The Yamaha Triple was the most technically innovative bike of its day. In addition to having a 120° three cylinder crank, it also features dual overhead cams, 3 carbs, shaft drive, triple disc brakes and solid alloy wheels. The only modern street triples are the new Triumph 750cc to 955cc bikes.The shaft drive was listed as a best feature by 59 percent of the owners. “Yeah, practice a lot before you go downshifting in turns. Shafties are different!”Only dislike was the mild vibration and oil consumption.

Already famed for its two-strokes, Yamaha had every intention of continuing its growth cycle The firm's ambition in the late Seventies was to challenge the giant Honda on its home ground, the big four-stroke multi.

A Difficult Task[edit]

1978 yamaha xs750 manual yamahaXs750

It was a difficult task for Yamaha to implement a new image on the big four-stroke market -already dominated by Honda, followed by Kawasaki and Suzuki -without being tagged as a copycat. Yamaha chose, with varying degrees of success, to go for technical originality, calling on outside designers to develop the technologies in which the firm was not yet experienced.

An XS of Originality[edit]

Yamaha chose the prestigious Porsche to develop the twin-cylinder engine of the TX 750 and the shaft drive of the XS750. Porsche was as good as its reputation; the XS was the sole motorcycle whose transmission incorporated a perfectly homokinetic tripode joint behind the gearbox rather than the normal cardan joint. Moreover, the Yamaha was also the only modern Japanese bike equipped with shaft final drive since Lilac had gone out ot' business in 1961. Another original feature of the XS 750 was its engine, whose three cylinders had Firing intervals of 120 degrees, with balance virtually equal to that of a four-cylinder engine (but more costly to achieve), this type of engine has the great advantage of being more narrow. But no matter how technically successful it was, it could not make headway against its four-cylinder rivals.

Engine[edit]

The engine was a air cooled in-line three, four-stroke. A 68.0mm bore x 68.6mm stroke result in a displacement of just 747.0 cubic centimeters. Fuel was supplied via a double overhead cams/twin cam (dohc).

Drive[edit]

The bike has a 5-speed transmission.

Chassis[edit]

It came with a 3.25-19 front tire and a 4.00-18 rear tire. Stopping was achieved via dual disc in the front and a single disc in the rear. The front suspension was a Telescopic Forks while the rear was equipped with a Dual Shocks Swing Arm. The XS750 Special was fitted with a 5.02 Gallon (19.00 Liters) fuel tank.

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1976[edit]

1979[edit]



1976 - 1980 Yamaha XS 750[edit]

The XS 750 and XS 850 were produced from 1976 to 1980. The US enjoyed this bike one year more. Because they had three cylinders, everybody knows the bikes as 'Triples'. At the beginning, the bike displaced 750cc and later the engine was increased to 850cc, so, the XS750 changed into a new XS850 machine. The Triples had electronic ignition from 1978.



Xs750

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In Media[edit]

External links[edit]

  • http://www.yamaha-triples.org

References[edit]

  1. 2019 K&L Supply Co Catalog. K&L Supply Co. 2019.


Yamaha
Motorcycles:
Yamaha XS series ·Yamaha IT series ·Yamaha MX series ·Yamaha YZ series ·Yamaha RD series ·Yamaha TZ series ·Yamaha FZR series ·Yamaha WR series ·Yamaha XT series ·Yamaha XV series ·
Misc:
Retrieved from 'https://www.cyclechaos.com/w/index.php?title=Yamaha_XS750&oldid=190845'
XS750
ManufacturerYamaha Motor Company
Also calledtriple
Parent companyYamaha
Production1976-1981
SuccessorXS850
Class750cc
Engine4 stroke 3 cylinder air cooled DOHC
Transmission5 speed
SuspensionFront: Telescopic fork (d:36mm)
Rear: Swing arm
BrakesFront: dual disc
Rear: disc
TiresFront: 3.25H-19-4PR/1.8 Kg/cm (26 psi)
Rear: 4.00H-18-4PR/2.0 Kg/cm (28 psi)
Rake, trail27 deg / 114 mm (4.49 in)
Wheelbase1,470 mm (57.9 in)
DimensionsL: 2,160 mm (85.0 in)
W: 965 mm (38.0 in)
H: 1,185 mm (46.7 in)
Fuel capacity17 liters (4.5 US gal)

1978 Yamaha Xs750 Manual Fuel Pump

The Yamaha XS 750 and Yamaha XS 850 was a line of inline three cylinder motorcycles produced by the Yamaha Motor Corporation from 1976 to 1981 for the worldwide motorcycle market. The last model year of manufacturing was 1981.Released in Japan in 1976 as the GX750 sporting wire wheels (as opposed to cast alloy in all other models) the XS750 became the name for the export model.

These motorcycles are usually referred to as 'Triples' because they have 3 cylinders.The first 4 model years the bike displaced 750cc. This was increased to 826cc for the final 2 model years but was referred to as an 850. There were various changes made to the model over the years.

1976 XS750 “C”[edit]

Very few of these bikes seem to have been made and even fewer survived. The cast wheels were in an unpainted finish and the decals were in a distinctive stripe design on the tank and side panels. This bike had a 3-1 exhaust system, and Mikuni “Mark I” carburetors. The air box assembly was different from later years. The air filter could be changed by opening the seat. This model had triple contact breaker points making timing adjustment complex. Also featured was a separate regulator and rectifier. The seat has a short tail piece this year.

This bike received rave reviews in Cycle World, who called it a 'Bargain BMW' and rated it one of their top 10 bikes in the world in 1976.[1]

1977 XS750 “D” and “2D”[edit]

A number of these made it out to export markets in late 1976. This bike was pretty much the “C” with a paint job. The tank now sports the familiar piping around the contours picking out the detail. Problems with reliability led to a further release in 1977. A particular problem was with 2nd gear. This had a habit of dropping into neutral under load. Canny riders would short-shift from 1st to 3rd gear; the engine had enough torque to support this technique. The Yamaha fix tended to be temporary, so not worth doing. The 'D' had the same tail piece as the 'C' and early GX750.

1978 Yamaha Xs750 Repair Manual

Released to return confidence to the model the 2D with some modifications to the “D” model. The bike now had 3 into 2 exhaust system with silencers on both sides of the bike, and improvements made to the engine to improve reliability. Fitted with electronic regulator/rectifier unit. This bike has a different seat from the 'C' and 'D'. The tail piece is longer and doesn't fit the early seats.

1978 XS750 “E” and “SE”[edit]

The now popular “2D” was upgraded to keep up with the market. Yamaha added electronic ignition this year but retained the mechanical timing advancing unit. They also replaced the carburetors for Mikuni “Mark II” CV models. These offered easier maintenance and a “two position enricher” (Choke) as opposed to the single position on the “Mark I” model. The engine again had some improvements including cam shafts to boost the power of the engine. The rev limit was raised to 9000 rpm this year from 7500 which the electronic ignition had allowed. Later “E” models also had a viewing window for the engine oil added in place of the dipstick.This year also saw the introduction of the XS750 “SE”, Special or US custom model. With longer front forks and a teardrop shaped tank with shorter exhausts and seat it had a “Chopper” appearance in contrast to the tourer or now referred to as “Standard” XS750 “E”. The change of carburetors also meant a change of air box design and the air filter was now changed without lifting the seat.The XS750 also came with a stock fairing with full storage and aerodynamic enclosure of the rider. The fairing also introduced additional stability to the motorcycle by creating additional rake to the frame. This was a first for bikes of this time, especially those in the 2400 to 2700 dollar price range.

Xs750

1979 XS750 “F” and “SF”[edit]

As above but European models came with an optional 24 liter fuel tank and also a new paint scheme. The cast wheels from this year on were of the 'tubeless design'.

Yamaha Xs750 Specs

1980 XS850 “G” and “SG” “LG”[edit]

Yamaha XS 850

The 826cc replacement for the XS750 was a very similar beast. The engine received bigger barrels and pistons, a beefier crankshaft, a wider primary chain and better oil ways. The addition of an oil cooler helped keep things cool. The European 850 “G” came with the 24 liter tank as standard, plus a huge 8' diameter headlight. Also added were frame improvements including a new swing arm mounting and alloy footrest carriers.(Also to be seen in some 'F' models. In the United States, the 850 “G” had a more custom look with a seat with no tail piece like the “SG” and different side panels. The exhausts on the European models have an offset in them to improve ground clearance at the rear.The “LG” was the midnight special, sporting black and gold designs on the engine and other parts.The European models had a wider seat and tail piece than the 750’s, but looked much more like them than the American 850 “G”.

1981 XS850 “H” and “SH” “LH”[edit]

As previous year. Also the last production year although models continued to sell for a few years after this. One final change, the ignition system was updated to electronic advanced timing and the mechanical advance assembly was removed.The “LH” was the midnight special, sporting black and gold designs on the engine and other parts.

See also[edit]

References[edit]

  1. ^Ric Anderson. 'Yamaha XS750'. Motorcycle Classics. Retrieved 2009-08-24.
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Yamaha_XS750&oldid=927549974'