1973 YAMAHA XS 650 MINT ORIGINAL CONDITION

Description

Up for sale is a very clean YAMAHA XS 65, Has about 17,000 miles on it about 900 with fresh top en, nbsp;all original except for the Kirker headers on the bike I do not have the original Pipe, lso I removed the points and condenser and installed an electronic Ignition for a more reliable rid, ther that that it is all ORIGINAL STOCK bik, he sea, nbsp;cable, nbsp;and everything else are origina, have installed new tires and tubes and rim strips for the spoke, he aluminum rims are absolutely perfect ! Changed the brakes out when the tires were installed this bike is ready to ride Seriously , dded a new Gel Batter, ll original paint and graphics . Had the carbs rebuilt and tuned at Shear's Cycles in Newark Ca. This bike sounds great and rides even nicer . Was stored in a garage since 1989 . I have owned this bike since 2012 and it has current license and registration in California ......Model history[edit]The 1970 model was designated the XS-1.[2]Subsequent Yamaha Xs650 models[3]were XS-1B (1971), S-2 (1972), hen TX (1973), X-A (1974), S-B (1975), S-C (1976), S-D (1977), S-E (1978), S-F (1979). 1979 was the last year of the so-called "Standards" (an unofficial term commonly used to differentate it from the "Special," which has pullback bars, teardrop tank, nd other differences in appearance). The Es and Fs also came in Special form: XS-SE (S for Special) and XS-SF. From then on they were Specials only to XS-SG, S-SH, S-SJ, S-SK. There was a Special II (Two) model designation in 1979 (XS-SF-II), 980 (XS-G), 981 (XS-H) which were models with fewer chrome parts and drum rear brake (1979, 980) or wire wheels (1981) versus disc rear brake or cast wheels.

The first two model years (XS-1 and XS-1B) were kick start only, ith an electric starter added from the 1972 model year on. This had acompression releaseadded to the front left exhaust tappet cover resulting in a square versus triangular cover found on the other exhaust and intake covers. Upon removal of the compression release mechanism in 1974 due to uprated starter, he square cover at the left exhaust valve was continued.

Brake modification notes:

• Drum fronts on early models cannot be changed.
• Pre '77 & post '77 fronts have different (offset) brake discs, he wheels swap but not the discs.
• Drum rear wheel into rear disc frame needs the rear drum frameswingarmtoo.
• Disk rear wheel into rear drum frame needs the rear disc frame swingarm and also needs brake master-cylinder lugs welded to the frame.

Handling differences on swapping rear wheels:-

• Standard rear tire is 110/90-18. Special rear tire is 130/90-16. Because the Standard tire is narrower it will tend to steer a bit more quickly. Because the Special tire is wider it will tend to be a bit steadier in a straight line. Overall gearing is not changed from the Standard, s the two tires are essentially the same outside diameter.

Prior to the XS-B model, he bike had a reputation for speed wobbles but adjustments to the 1975 setup overcame these.

1976 models had the front brake caliper moved to the right fork leg, ehind the fork as opposed to in front of the fork. This placed the brake caliper nearer the axle center-line, equiring slightly less effort to steer.

Mid-'77 the front forks had a major redesign, ork tube diameter increased from 34 to 35mm (1.4in) and internals were changed (although this also holds true for various years of the same tube size). The entire fork assembly (with triple tree) will swap either way but fork parts are not equivalent. Also the brake caliper changed from a 48mm (1.9in) dual piston cast iron design for the 34mm (1.3in) fork to a 40mm (1.6in) aluminum single piston floating caliper for the 35mm (1.4in) forks. The brake caliper mounting lugs on the fork sliders are of different spacing for the 34mm (1.3in) and 35mm (1.4in) forks so the calipers can't be swapped.

End of production[edit]The XS 650 was produced until 1985. The last model year was 1983 in the United States, ith Canada, urope and other markets continuing into 1984 and 1985. However, any US models remained unsold for some years due to overproduction and an economic recession and brand new 1982 and 1983 models could still be purchased in 1987 at some dealerships.

Design[edit]Engine[edit]Like its contemporaries in its class the XS 650 has a 360°crank angle. This provides an even firing interval between the twocylinders, ut also generates somevibrationcaused by the twopistonsrising and falling together. This vibration is particularly noticeable atidle.

The XS 650svalvesare operated by a singleoverhead camshaft(SOHC) whereas almost all contemporaries in its class havepushrodvalvegear[citation needed].

The 360 degrees crankshaft uses three roller bearings and a ball bearing. The camshaft uses four ball bearings, nd rolling bearings are used throughout the rest of the engine. Connecting rods turn on needle bearings. Since the engine is SOHC, here are no pushrods to operate the valves. The camshaft gets its drive from a single-row chain running from the center of the crankshaft. Chain tension is maintained by a spring-loaded guide, hich also takes up unnecessary slack. Theintake valveopens 47 degrees BTC, loses 67 degrees ATC, ielding intake duration of 294 degrees, xhaust duration on 281 degrees, nd an overlap of 88 degrees. Because theflywheelis lighter than British contemporaries, he engine tends to pick up revs more rapidly when the throttle is opened quickly.

During the later developments of the engine compression ratios were lowered, hen raised. Pistons were lightened 20 percent along withconnecting rodsto reduce the reciprocating mass inside the engine.Aluminumpistons are slightly domed with valve pockets. Pistons have three rings installed, wo compression and one oil control ring.

Horizontal split of the crankcases offers the advantages of oil tightness through the elimination of vertical joints and one-step access to both the lower end and the gearbox. Oil pressure is provided by thetrochoidal pump, riven by a steelspur gearoff the crankshaft. The main bearings, rank pins, ransmission main shaft,clutchbushing, hifter fork guide bar, nd rocker arms are lubricated by pressurized oil, hereas the rest of the engine is lubricated by “oil splash.”[4][5]

Carburetion[edit]Pre-1980 models use the twin 38mm (1.5in) constantvelocityMikunicarburetors that can be tuned by moving the needle clip position, r by replacing jets. In the carburetors the velocity of the fuel mixture through the venturi, egulated by the opening of thebutterfly valvesand engine speed, auses a pressure difference between the top and the bottom of the carburetor pistons. This pressure difference raises and lowers the carburetor slides, ncreasing or decreasing engine output accordingly.

Post-1979 models use smaller 34mm (1.3in) Mikuni CV carbs with needles that seem to be listed in parts menus as being 'fixed' position,(in other words a needle that may only have one clip position). The pilot and main jets can be changed for different sizes. If the 34mm (1.3in) CV carb needles only have one fixed clip position.

Ignition[edit]The models up to 1979 use points ignition. Two sets of points are located on the upper left of the cylinder head. On the right side cylinder head, n advance mechanism is located. An advance mechanism is used to retard the timing for easy starting and smooth idle. Post-1979 models useelectronic ignitionsystems.

1979 Yamaha XS650 Advance Mechanism1979 Yamaha XS650 Point IgnitionPerformance[edit]Cycle Worldtested the XS650 in March 1979.[6]It ran the standing-start quarter mile 13.86 seconds with a terminal speed of 96.05mph (154.58km/h). The motorcycle's average fuel economy was 51.4 miles per US gallon (4.58L/100km; 61.7mpg-imp)[7]

See also[edit]

• Yamaha XS750 Triple Special
• Kawasaki KZ650
• Honda CB650

References[edit]

Jump up^"Yamaha XS650".Classic Japanese Bikes. Retrieved2012-04-16.

Jump up^Ric Anderson (Premier Issue)."Yamaha XS650". Motorcycle Classics. Retrieved2009-08-24.Check date values in:|date=(help)

Jump up^Yamaha Xs650 modelID table, ode, erial Number, ear, olor(s) - Xs650chopper - Retrieved 2013-07-24

Jump up^"Yamaha Xs". Biker.net. 2006-01-24. Retriev

Please check out all the pictures I have it listed here local as well and may end the auction early

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