![]() Bore and stoke were slightly different, the 438 got a slightly bigger carb, and the final gearing was changed. A 438cc CCW KEC 440/21 motor replaced the 436cc CCW KEC 440/4 powerplant of the Model 500. “The ultra-low silhouette, bold ‘blitz-black’ color, and unique trim treatment suggest eager speed and agile handling.”īut observation of the ‘73 Deere spec sheets and new model photos would lead you to believe that there was no difference between the carryover Model 500 green machine and the JDX models except for color, a lower windshield and ski shocks on the new additions to the line.Īctually that wasn’t quite correct because the JDX 8 did get a similar but completely different engine. “From ski tip to snow flap, the JDX 8 is a totally new sled,” read the brochure. #SLIDE RUNNER FOR JOHN DEERE CYCLONE 440 SERIES#Two versions were available for 1973: the top-of-the-line JDX 8 with a CCW 440 engine and a Salisbury 850 drive clutch and the JDX 4 with a Kohler 292, a Salsbury 780 drive clutch and a bit less standard equipment.Īs the new flagship of the line, the JDX series was promoted in John Deere sales literature as having “superior performance and distinctive styling.” Superlatives were flung around like macaroni salad in a food fight, always a good indication of a bunch of baloney. The market was moving toward better performance, so Deere again followed many other brands by adapting the outmoded template for its new JDX series. The John Deere JDX snowmobile was a musclesled masquerader. Introduced for the 1972 model year, the initial John Deere snowmobiles were well-built and reliable, but hamstrung by the inherent ride and handling limitations of Bombardier’s now outdated concept. When Deere and Company began developing a snow machine in 1969, it joined many others by copying market-leader Bombardier’s successful layout with the engine atop a welded steel tunnel and bogie wheels underneath. ![]()
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