The bore and stroke is 80x68.

Anybody know the bore and stroke from the sled? My guess is that it was destroked not desleaved. Who knows for sure?

 

Polaris sent me the engine spec's on the Frontier that I asked for!

The bore and stroke of the 780 sled engine is!!!! 80x78

The 100cc the 780 sled has over the 680 Sportsman is all in the crank.


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2002 Frontier Engine

Model. Frontier Touring, Engine Make. Polaris, CC’s. 780, Bore/Stroke (mm). 80 x 78, Cooling. Liquid, No. Cyl. 2, HP. 48, Cyl. Liner. NiCaSil, Induction Type. 4 Stroke OHV, Carb No. / Type. EFI, Ignition Type. Inductive CDI, Exhaust. Single.


Specifications: (Subject to Change w/o Notice)
Polaris Frontier Touring
Suggested Retail $7,699
Dimensions/Capacities:
Chassis EDGE
Fuel Capacity (US Gallons) 11.8
Ski Center (In.) 42.5
Est. Dry Weight (Lbs) 581
Engine/Drive:
Displacement (cc) 780 4 Stroke
Horsepower 48
Cylinders 2
Cooling Liquid
Exhaust Single
Carb Type/ No. Closed Loop EFI
Brake Type Polaris HPB
Front Suspension:
Type EDGE CRC
Travel (in.) 10
Shock Nitrex
Ski Type Composite
Ski Runner Carbide
Torsion Bar Std
Rear Suspension:
Type EDGE Touring 136
Travel (in.) 12
Front Track Shock Nitrex
Rear Track Shock Select
Track W x L x Lug (in.) 15 x 136 x 1.0
Features:
Hood Material TPO
Electric Start Std
Reverse Std
Hand/Thumbwarmer Std Adjustable
Speedometer Std 5”
Tachometer Std 5”
Fuel Gauge Std Electric
Low Oil Light Std
Engine Block Heater Std
Seat 2-Up
Backrest Std Adjustable
Rear Rack Std
Heated Pass. Grips Std
Accy Power Outlet Std
Mirrors Std
Headlight Halogen 120/110
Polaris reserves the right to change specifications and pricing at any time without incurring obligations