| Big Bear Choppers Athena ProStreet Carb | BMW R 12 |
|---|
| engine specs | |
| Type | |
|---|---|
| BBC-S&S V111 Carb Evolution | Water-cooled, 2-cylinder, four-stroke boxer engine with four valves per cylinder operated by cam followers and two overhead camshafts per cylinder |
| Displacement | |
| 1819 cm3 | 1170 cm3 |
| Bore X Stroke | |
| 4.1x4.1 in OR 104 mm | 4.0x2.9 in OR 102 mm |
| Horsepower | |
| 116/- KW(hp)/RPM | 95/6500 KW(hp)/RPM |
| Torque | |
| 123/- lb-ft/RPM OR 167/- Nm/RPM | 81/6000 lb-ft/RPM OR 110/6000 Nm/RPM |
| Fuel System | |
| S&S Super E carburetor | - |
| transmission specs | |
| Gearbox | |
|---|---|
| 6-speed, overdrive, manual | 6-speed |
| Clutch | |
| wet multi-disc, manual | - |
| Primary Drive | |
| enclosed belt | - |
| Final Drive | |
| RSD belt | Shaft |
| chassis specs | |
| Frame | |
|---|---|
| steel | Tubular space frame in steel, engine self-supporting |
| Front Suspension | |
| BBC Smooth Mount Hidden Axle | USD telescopic forks, 45 mm |
| Rear Suspension | |
| progressive shock absorber | Aluminium Paralever swinging arm, directly linked WAD spring strut, spring base and rebound damping adjustable |
| Front Brake | |
| P.M. 4-piston caliper | Twin disc brake, floating brake discs, 310 mm, 4-piston monobloc fixed calipers |
| Rear Brake | |
| BBC-P.M. 4-piston caliper | Single disc brake, 265 mm, 2-piston floating caliper |
| dimension specs | |
| Overall Length | |
|---|---|
| 113 in OR 2870 mm | 86.6 in OR 2200 mm |
| Overall Width | |
| - | 32.7 in OR 831 mm |
| Seat Height | |
| 20 in OR 508 mm | 29.7 in OR 754 mm |
| Weight | |
| 1543 lbs OR 700 kg | 500 lbs OR 227 kg |
| Fuel Capacity | |
| 3.75 gallons OR 14.2 L | 3.7 gallons OR 14.0 L |
| Wheelbase | |
| 86 in OR 2184 mm | 59.8 in OR 1519 mm |
| tyres specs | |
| Front | |
|---|---|
| Avon Cobra 90mm | 100/90-19 |
| Rear | |
| Avon Cobra 300mm | 150/80-16 |
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