Yamaha XS400 History
Yamaha was riding the wave of popular 400cc engines and now reaping the benefits of the XS series as well. It is therefore not a surprise that their engineers wanted to combine the two to create an ideal bike. Evolving directly from the earlier XS360 model, the Yamaha XS400D was introduced to US market in 1977 and to Europe in early 1978. It was advertised as a commuter model, targeting students and low-income motorcyclists.
This was also supported by motorcycle importers such as Mitsui Maschinen GMBH, who in 1978 started Yamaha XS400 Cup in hope to promote young motorcycle racing talents. As a young rider, if you thought that 400cc is a bit too much, Yamaha also offered XS 250 version. These were nearly identical variations of the same model.
First Yamaha XS400 2a2
It had four stroke air cooled twin engine which powered the single overhead camshaft by chain. The engine, and 6 disc clutch, was fitted together into the horizontally split crankcase so typical for XS series. Early models had points ignition system and electric starter backed up with manual kickstart. The engine with pair of 34 mm Mikuni carbs was fitted into a tubular steel frame with dual cradle. First 400cc XS also had a squared-off 11l fuel tank, non-adjustable telescopic forks at front and swingarm with 5way adjustable shocks at rear. The 1978 XS400 became an immediate bestseller in Germany and continental Europe.
As with many bikes, Yamaha was trying various features to see what suited their customers at different markets like self canceling turn signals, kickstart only on economy models, also factory custom versions such as Special, Special II. & Heritage marked with special Heritage badges. But generally speaking, there were the following changes throughout the time:
1979 Yamaha XS400 F received a teardrop 16l tank and slightly stepped seat, swing arm was extended by 40 mm, cast alloy wheels with disc brake at front and drum brakes fitted at rear
1980 Yamaha XS400 SG / SE got even more “cruiser like” appearance with deeper step on the seat, pull back bars, 16” rim at rear wheel, improved exhaust system and other cosmetic changes
1982 Yamaha XS400 R Seca was ultimately a different design altogether. It was meant to be the highlight of the series with two overhead cam shafts, new Yamaha induction control system (YICS), black narrower engine with alternator laid over the gearbox, hydraulic telescopic front forks, monoshock swing arms at the rear and brand-new tank design with even larger capacity.
XS 400 Custom
Today XS400 is appreciated by fans and hobbyist for its simple technology and endless modification possibilities. Whether you want to keep the classic style of your bike or turn it into a Yamaha XS400 café racer, Yamaha XS400 scrambler or Yamaha XS400 bobber, the option is yours.
XS400 Café Racer Parts
Since XS 400 Yamaha was so popular in its days, there are still lots of these bikes on market. Their parts were and some of them still are easily accessible. Some of those that Yamaha stopped producing, we have decided to reproduce. We now offer not only aftermarket parts, but also Yamaha originals, concentrating on perishable rubber and plastic components. If you can't find the part that you need in our collection, please contact us.
There are also XS400 owners clubs and specialised forums all over the World, especially in Europe, USA and Australia so if you are struggling with your restoration or personalisation project, you have ample of people to turn to for advice, just check out of these links: XS400.com (EN) and XS400.net (DE)
This section contains aftermarket reproduction parts for:
1977 Yamaha XS400D
1978 Yamaha XS400E / 400-2E
1979 Yamaha XS400F /2F
1980 Yamaha XS400G /SG
1981 Yamaha XS400H /SH
1982 Yamaha XS400J/R/RJ/SJ
1983 Yamaha XS400K / RK
Technical Specifications of Yamaha XS400
Model: Yamaha XS400
Motorcycle Type: Classic / Road
Dry weight: 182 kg
Fuel tank size: 3.7 Gallon (14 Litres)
Engine, Intake & Transmission
Displacement: 392 cc
Engine: parallel twin cylinder, four-stroke, SOHC
Top speed: 105 mph (169 km/h)
Fuel system: 2 x BS32 Mikuni Carburettors
Fuel control: Overhead Cams (OHC)
Ignition: Battery & CB
Lubrication system: Wet Sump
Cooling system: Air cooled
Transmission type: Chain
Starting: Electric start supplied by the kickstart
Chassis, suspension, brakes and wheels
Frame type: Duplex cradle
Front suspension: Telescopic forks
Rear suspension: Dual shock absorbers - swingarm
Front brakes: Single disc
Rear brakes: Drum brakes