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John Deere 340 & 440 Cyclone Snowmobile Specifications

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Complete specifications for the John Deere 340 Cyclone and 440 Cyclone snowmobiles, transcribed from the specifications section of the factory operator's manual (OM-M67673). Both models use a two-cylinder Kioritz-built engine (KEC 340/22C and KEC 440/22C) with a Mikuni carburetor, a Comet 102C variable-sheave drive, slide suspension and a 15.5 in. rubber track. They share the same chassis, body and dimensions and differ mainly in engine bore, displacement and final drive ratio. For the twin-carburetor Liquifire models, see the 340 & 440 Liquifire specifications.

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Engine

Item 340 Cyclone 440 Cyclone
Manufacturer John Deere (Kioritz)1 John Deere (Kioritz)1
Model KEC 340/22C KEC 440/22C
No. of Cylinders 2 2
Bore 58 mm 66 mm
Stroke 64 mm 64 mm
Displacement 339 cc 438 cc

Fuel System

Item 340 Cyclone 440 Cyclone
Carburetor Manufacturer Mikuni Mikuni
Carburetor Number AM54243 AM54244
Tank Capacity 7 U.S. gal. (26.5 L) 7 U.S. gal. (26.5 L)
Fuel Mixing Ratio See Fuel & Oil Mixtures below2

Chassis & Body

Item 340 Cyclone 440 Cyclone
Tunnel & Pan Aluminum Aluminum
Hood Sheet Molding Compound Sheet Molding Compound
Windshield Polycarbonate Polycarbonate
Overall Length 107 in. (271.8 cm) 107 in. (271.8 cm)
Overall Width 39 in. (99.1 cm) 39 in. (99.1 cm)
Overall Height 41.5 in. (105.4 cm) 41.5 in. (105.4 cm)
Weight (Approx.) 395 lbs. (179.1 kg) 395 lbs. (179.1 kg)

Track & Suspension

Item 340 Cyclone 440 Cyclone
Suspension Type Slide Suspension Slide Suspension
Track Material Rubber Rubber
Track Width 15.5 in. (39.4 cm) 15.5 in. (39.4 cm)

Power Train

Item 340 Cyclone 440 Cyclone
Transmission Type 2 Sheave Variable 2 Sheave Variable
Primary (Manufacturer) John Deere (Comet)3 John Deere (Comet)3
Secondary (Manufacturer) John Deere John Deere
Model 102C (Comet) 102C (Comet)
Final Drive Ratio (Standard) 1.86:1 1.68:1
Brake Mechanical Disk Mechanical Disk
Drive Belt M66345 M66345

Electrical System

Applies to both the 340 and 440 Cyclone.

Spark Plug (Champion) N-1 (AM54319)
Spark Plug Gap See "Checking Spark Plug," manual page 132
Timing 0.096 in. (2.44 mm) BTDC, engine running at 2200 rpm (minimum)
Lighting Coil Capacity 120 Watt
Headlight Bulb AM53887
Stop-Taillight Bulb AM52619
Speedometer Bulb AM52847
Tachometer Bulb AM52847

Fuel & Oil Mixtures

United States

Ratio Oil Leaded Fuel
40:1 1 pint (0.473 L) 5 gal. (18.9 L)
50:1 1 pint (0.473 L) 6 gal. (22.7 L)

Canada

Ratio Oil Leaded Fuel
40:1 1 U.S. pint (0.473 L) 4 Imperial gal. (18.2 L)
40:1 1 Imperial pint (0.568 L) 5 Imperial gal. (22.7 L)
50:1 1 U.S. pint (0.473 L) 5 Imperial gal. (22.7 L)
50:1 1 Imperial pint (0.568 L) 6 Imperial gal. (27.3 L)

A U.S. gallon contains 3.785 liters and a Canadian Imperial gallon contains 4.543 liters. The manual's predelivery check list calls for a 40:1 mix for the first tank of fuel and 50:1 thereafter, using leaded fuel with a minimum octane rating of 88.

Notes:
1 Engines manufactured for John Deere by Kioritz Corporation, Tokyo, Japan.
2 Page references are to the operator's manual, not to this page.
3 Primary drive manufactured for John Deere by Comet Industries, Richmond, Indiana.
All specifications transcribed from the specifications section of the John Deere 340 and 440 Cyclone Snowmobiles operator's manual, OM-M67673 Issue F7, originally published by John Deere. John Deere reserved the right to change specifications and design without notice; verify against your snowmobile before ordering parts or setting timing.

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