Motorbike Update

2012 Harley-Davidson Engine With Twin Cam 103™

Harley-Davidson Big Twin offers more performance than its 2012 Twin Cam 103 ™ powertrain is standard on the Touring and Softail ® motorcycle and most of the Dyna ® motorcycle.

Twin Cam 103 ™ engine with 103 cid (1690cc), rubber-mounted in the frame, is rated at 100 pounds- feet. of torque at 3500 RPM. The engine is equipped with electronic sequential fuel injection (ESPFI) and is mated to a 6-speed Cruise Drive ® transmission.

2012 Harley-Davidson FXDF Dyna Fat Bob with Twin Cam 103
2012 Harley-Davidson FXDF Dyna Fat Bob with Twin Cam 103

The Twin Cam 103™ engine powers all 2012 Dyna®, Softail® and Touring models with the exception of the Dyna Street Bob® and Dyna Super Glide® Custom. This engine produces up to 100 ft lbs. peak torque, an increase of approximately 6 percent over the Twin Cam 96 engine it replaces as standard power for many of these models. The Twin Cam 103 is equipped with automatic compression release. It features identifying badges on the derby cover, timer cover and air cleaner trim ring. in one.

All Harley-Davidson Softail models get the performance boost of the Twin Cam 103 engine for 2012. The Fat Boy and Fat Boy Lo have a new reduced-reach handlebar for more-comfortable ergonomics. A lower, narrower seat shape places the Fat Boy rider in a new "in the bike" position. The Softail Deluxe and Heritage Softail Classic will be available with a new optional "tubeless" Chrome Aluminum Profile Laced wheel option for ease of tire replacement and repair.

The Twin Cam 103 powertrain gives all Harley-Davidson Touring models assertive power for passing. On Touring models, the Twin Cam 103 is equipped with an oil cooler.

2012 Harley-Davidson Twin Cam 103 V-Twin Engine

2012 Harley-Davidson Twin Cam 103 V-Twin Engine

2012 Harley-Davidson Twin Cam 103 V-Twin Engine

2012 Harley-Davidson Twin Cam 103 V-Twin Engine - USA Specifications / Technical Details
US MSRP Price: See Dealer for pricing

Ground Clearance 4.3 in. (110 mm)
Rake (steering head) 29.9°
Fork Angle 28.9°
Trail 5.84 in. (148.3 mm)
Wheelbase 62.8 in. (1595 mm)
Tires (Dunlop® Harley-Davidson® Series, bias blackwall front and rear):
- Front – Dunlop® D402F 130/70B18 63H
- Rear – Dunlop® D401 160/70B17 73H
Fuel Capacity 4.7 gal. (17.8 L) (warning light at approximately 0.9 gal.)
Oil Capacity (w/filter) 3.0 qts. (2.8 L)
Transmission Capacity 1.0 qt. (.95 L)
Primary Chain
Case Capacity 1.0 qt. (.95 L)

Engine Air-cooled, Twin Cam 103™
Valves Pushrod-operated, overhead valves with hydraulic, self adjusting lifters; two valves per cylinder
Bore x Stroke 3.875 in. x 4.38 in. (98.4 mm x 111.3 mm)
Displacement 103 cu. in. (1690 cc)
Compression Ratio 9.6:1
Fuel System3 Electronic Sequential Port Fuel Injection (ESPFI)
Air Cleaner Fiberglass media, washable
Lubrication System Pressurized, dry-sump

Primary Drive Chain, 34/46 ratio
Final Drive Belt, 32/66 ratio
Clutch Multi-plate, wet
Transmission 6-Speed Cruise Drive®
Gear Ratios (overall): U.S.
- 1st 9.311
- 2nd 6.454
- 3rd 4.793
- 4th 3.882
- 5th 3.307
- 6th 2.79

Engine Torque5 (per J1349):
- North America 100 ft. lbs. @ 3500 RPM (136 Nm @ 3500 RPM)
Lean Angle (per J1168):
- Right 29°
- Left 29°
Fuel Economy6 (EPA urban/highway test) 42 mpg (5.6 L/100 km)

2012 Harley-Davidson Twin Cam 103 V-Twin Engine - Canadian Specifications / Technical Details
MSRP Price: See dealer for pricing.

Engine 1: Air-cooled, Twin Cam 103™
Bore: 98.4 mm
Stroke: 111.1 mm
Displacement: 1,691 cc
Compression Ratio: 9.6:1
Fuel SystemElectronic Sequential Port Fuel Injection (ESPFI)

Primary Drive: Chain, 34/46 ratio
Gear Ratios (overall) 1st: 9.311
Gear Ratios (overall) 2nd: 6.454
Gear Ratios (overall) 3rd: 4.793
Gear Ratios (overall) 4th: 3.882
Gear Ratios (overall) 5th: 3.307
Gear Ratios (overall) 6th: 2.79

Engine Torque Testing Method: J1349
Engine Torque 2: 136 Nm
Engine Torque (rpm): 3,500
Lean Angle, Right (deg.): 29
Lean Angle, Left (deg.): 29
Fuel Economy: Combined City/Hwy: 5.6 l/100 km
2012 Harley-Davidson Engine With Twin Cam 103™ Reviewed by Dening Nyess on Rating: 4.5

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