REF: Extra Models10 - Sportsterpedia

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====== REF: Extra Models10 ======
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====== XR-750 General Information ======
===== Engine VIN Coding =====
{{:sportster_history:xr-750_engine_vin_chart_by_hippysmack.png?direct&600|}} Drawing by Hippysmack)) \\
====== Specs / Features ======
===== 1972 =====
New redeigned 750cc engine with aluminum cylinders and heads. Also had new valves, pistons, rods, flywheel assm, "E" cams, carbs and tuned exhaust, 7/8" dia handlebars with an aluminum ball end clutch lever and a fiberglass seat/fender with a foam cushion. 
    * Engine Type: OHV V-Twin
    * Carburetion: Dual 36mm Mikuni carburetors and specially designed air filters
    * Exhaust System: Tuned duals with reverse-cone megaphones
    * Bore and Stroke: 3.125" x 2.983"
    * Displacement: 45cu, 750cc
    * Compression Ratio: 10:1
    * Max RPM: 8000
    * Clutch Type: Multi-plate dry clutch
    * Primary Drive: 25 tooth engine sprocket, 59 tooth clutch, triple row roller chain
    * Rear Drive: 16 tooth transmission sprocket, 40 tooth rear wheel sprocket
    * Overall Drive Ratio: 5.90:1
    * Transmission: Constant Mesh, 4 speed
    * Transmission Gear Ratios:
      * 1st 2.09:1
      * 2nd 1.51:1
      * 3rd 1.14:1
      * 4th 1:1
    * Weight: 295 lbs
    * Tires (front and rear): 4.0 x 19 on aluminum rims
    * Front Forks: Ceriani with 4.40” travel and aluminum fork bracket
    * Rear Shocks: Girling hydraulic racing shocks
    * Gas Tank: Fiberglass construction with 2-1/2 gallon capacity
    * Oil Tank: 3 quarts
    * Electrical: Fairbanks-Morse magneto
    * Color: Jet Fire Orange

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