The fuel tank on the 1987 Yamaha Virago 750 holds about 2.3 gallons of gas. This bike is a cruiser with an air cooled four stroke engine.
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The tires on a 1984 Yamaha Virago XV1000 are 100/90-19 for the front tire. The rear tire should be 140/90-15.
100/90-19 57H for the XV1100.
140/90-15 for rear and 100/90-19 for front.
When changing the oil in a Yamaha Virago 250, it depends on the engine size as to how much oil to put in. If it is a 1.4L only 0.36 gallons of oil are needed. However, if it is a 2L then 0.52 gallons are necessary. Do not overflow the reservoir.
3.2 gal. ( 12 l ) Reserve 0.7 gal. ( 2.6 l )
Stock 145
13.2 gallons
For the 535 model, according to (http://www.artsturm.ee/virago_535/specs.html) that would be 3.7 gallons (13.5L = 3.56632271 US gallons).
A 1987 Chevy Silverado has a 20 gal. fuel tank
14 galoons
18 Gallons