1977 FXS

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*1977 FSX

The First Factory Lowrider

This is what they looked like when they rolled out of the factory.
Stock 77 FXS

Production 3,742 units
Power plant 74 CI V-twin, 4-speed
List Price $3,898
The Low rider was the beginning of the Factory Custom bikes, low drag type handlebars, two into one pipes and the low profile of the bike made it an instant success.

They had the Big Twin Shovel 1200 engine, which is a little different from the Evo Sportster 1200

Factory Displacement

 

Model

CC’s

 Bore Stroke Cubic Inches
Iron XR  745 3.000 3.219 45.5
Alloy XR 748 3.125 2.980 45.7
Sportster  900 - 883 883 3.000 3.8125 53.9
Sportster 1000 1076 3.3125 3.8125 65.7
Sportster 1100 1101 3.350 3.8125 67.2
Sportster 1200 1201 3.500 3.8125 73.3
Big Twin Shovel 1206 3.4375 3.9688 73.6
Big Twin Evo 1340 3.500 4.250 81.7

Twin Cam 

1449

3.750

 4.000

88.4

The longer stroke makes for a whole lot more piston speed per RPM , which is a lot harder on the lower end. Every time Teri says she has the same size engine, I get to tell her that mine is 3 tenths of a cubic inch bigger. Even though her Sportster will out run me, I just tell her it's because mine weighs about 200 lbs. more than hers, otherwise I'd be able to easily whip her. (I've gotta tell her something!) If she gets too cocky I threaten to get the X-R out.

 

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