The Harley-DavidsonMilwaukee-Eight engine is the ninth generation of "big twin" engines developed by the company, but only Harley's fourth all-new Big Twin in 80 years, first introduced in 2016. These engines differ from the traditional Harley Big Twin engines in that there are four valves per cylinder, totaling eight valves, hence the name. It also marked a return to the single-camshaft configuration as used on previous Harley Big Twin Engines from 1936 to 1999. In addition, the engines all have internal counterbalancers, whereas Twin Cams were counterbalanced only on Softail models, where the engine was rigidly mounted.
All engines have eight valves in two cylinders in the traditional Harley-Davidson Radial V-twin configuration at 45°, are combination of air-cooled and oil-cooled, and activate valves with push-rods. The 107 cu in (1,750 cc) model with a claimed 108–112 lb⋅ft (146–152 N⋅m) is standard on all models, with the 114 cu in (1,870 cc) version making a claimed 119 lb⋅ft (161 N⋅m) remaining as an option on some softails and all touring and trike models, and the 117 cu in (1,920 cc) is standard on CVO models with a claimed 124 lb⋅ft (168 N⋅m) and rear wheel power of 93.75 hp (69.91 kW) @ 4,870 rpm and 112.51 lb⋅ft (152.54 N⋅m) @ 3,400 rpm.[1][2][3] For model year 2022, the 117 cu in version became standard on Breakout and Low Rider S/ST Softail models and on the "ST" variants of the Touring models. In 2023, the 121 cu in (1,980 cc) version equipped with variable-valve timing debuted on the CVO models.
In 2016, the Milwaukee-Eight engines became available on Touring and Trike models of the 2017 model year. The Softail models started using the Milwaukee-Eight the following year. The most significant change from the Twin Cam are the two extra valves per cylinder head which produce 10 percent more torque. The exhaust and intake flow capacity is increased by 50 percent over the Twin Cam models. Although weighing the same as its predecessor, both models of the Milwaukee-Eight increase in acceleration by 10% (0-60 for the 107 vs the 103) and 8% (0-60 for the 114 vs. the 110). Fuel economy is also increased, with percentages varying for engine and model.[4]
Improvementsedit
Harley conducted interviews in seven cities; over 1,000 people were asked to outline what they would like to see in the next line of touring bikes. These interviews resulted in the new Milwaukee-Eight engine. The biggest improvements people wanted to see were more power, less heat, and less vibration. Harley was able to increase the power while also keeping the range and consumption similar and in some cases making it even better. To deal with the heat issue, Harley reduced the exhaust gas temperature by 100°F (55.6 C) by introducing a better water cooling solution, and also relocated the hot catalytic converters further from the cockpit, allowing for a more comfortable ride. Finally, Harley looked at the vibration issues and decided to reduce the vibrations by 75%, to try to effect a balance between the expectations of hardcore fans and new Harley owners.[5]
Receptionedit
Cycle World, like many other motorcycle magazines, was given the opportunity to test ride and review the Milwaukee-Eight engine. The reviews have been positive, and report a better ride quality, while still keeping the Harley feel. Cycle World's reviewer reported a noticeable reduction in the heat output from the engine, enabling the reviewer to ride more comfortably. The review concludes that the changes make this engine an improvement over its predecessor. [6]
Referencesedit
^Brasfield, Evans (23 August 2016). "Harley-Davidson Unveils The Milwaukee-Eight Engine For Touring Models". Motorcycle.com. Retrieved 8 September 2016.
^"2018 CVO STREET GLIDE". Harley-Davidson. 2018. Retrieved February 21, 2018.
^McDevitt For comparison a 1996 Geo Metro is rated at 49 HP and 55lbs/ft torque all out of a three cylinder one litre engine. This out of the 1996 Geo Metro Owners manual, Jon (March 20, 2018). "2018 Harley-Davidson CVO Road Glide Dyno". www.cycleworld.com. Retrieved March 23, 2018.{{cite web}}: CS1 maint: numeric names: authors list (link)
^Masker, Mark (24 August 2016). "10 Key Differences Between Harley's Milwaukee-8 & Twin Cam". Hot Bike. Bonnier Corporation. Retrieved 8 September 2016.
harley, davidson, milwaukee, eight, engine, ninth, generation, twin, engines, developed, company, only, harley, fourth, twin, years, first, introduced, 2016, these, engines, differ, from, traditional, harley, twin, engines, that, there, four, valves, cylinder,. The Harley Davidson Milwaukee Eight engine is the ninth generation of big twin engines developed by the company but only Harley s fourth all new Big Twin in 80 years first introduced in 2016 These engines differ from the traditional Harley Big Twin engines in that there are four valves per cylinder totaling eight valves hence the name It also marked a return to the single camshaft configuration as used on previous Harley Big Twin Engines from 1936 to 1999 In addition the engines all have internal counterbalancers whereas Twin Cams were counterbalanced only on Softail models where the engine was rigidly mounted Harley Davidson Milwaukee Eight EngineThe Milwaukee Eight engine 117 2019 ManufacturerHarley DavidsonParent companyHarley DavidsonProductionSince 2017PredecessorTwin CamClassRadial V TwinPower81hp 107ci 86hp 114ci Rear Wheel Contents 1 107 and 114 and 117 engines 2 Differences from the predecessor Twin Cam 3 Improvements 4 Reception 5 References107 and 114 and 117 engines editAll engines have eight valves in two cylinders in the traditional Harley Davidson Radial V twin configuration at 45 are combination of air cooled and oil cooled and activate valves with push rods The 107 cu in 1 750 cc model with a claimed 108 112 lb ft 146 152 N m is standard on all models with the 114 cu in 1 870 cc version making a claimed 119 lb ft 161 N m remaining as an option on some softails and all touring and trike models and the 117 cu in 1 920 cc is standard on CVO models with a claimed 124 lb ft 168 N m and rear wheel power of 93 75 hp 69 91 kW 4 870 rpm and 112 51 lb ft 152 54 N m 3 400 rpm 1 2 3 For model year 2022 the 117 cu in version became standard on Breakout and Low Rider S ST Softail models and on the ST variants of the Touring models In 2023 the 121 cu in 1 980 cc version equipped with variable valve timing debuted on the CVO models Differences from the predecessor Twin Cam edit nbsp Harley Davidson Milwaukee Eight engine at the Harley Davidson Museum In 2016 the Milwaukee Eight engines became available on Touring and Trike models of the 2017 model year The Softail models started using the Milwaukee Eight the following year The most significant change from the Twin Cam are the two extra valves per cylinder head which produce 10 percent more torque The exhaust and intake flow capacity is increased by 50 percent over the Twin Cam models Although weighing the same as its predecessor both models of the Milwaukee Eight increase in acceleration by 10 0 60 for the 107 vs the 103 and 8 0 60 for the 114 vs the 110 Fuel economy is also increased with percentages varying for engine and model 4 Improvements editHarley conducted interviews in seven cities over 1 000 people were asked to outline what they would like to see in the next line of touring bikes These interviews resulted in the new Milwaukee Eight engine The biggest improvements people wanted to see were more power less heat and less vibration Harley was able to increase the power while also keeping the range and consumption similar and in some cases making it even better To deal with the heat issue Harley reduced the exhaust gas temperature by 100 F 55 6 C by introducing a better water cooling solution and also relocated the hot catalytic converters further from the cockpit allowing for a more comfortable ride Finally Harley looked at the vibration issues and decided to reduce the vibrations by 75 to try to effect a balance between the expectations of hardcore fans and new Harley owners 5 Reception editCycle World like many other motorcycle magazines was given the opportunity to test ride and review the Milwaukee Eight engine The reviews have been positive and report a better ride quality while still keeping the Harley feel Cycle World s reviewer reported a noticeable reduction in the heat output from the engine enabling the reviewer to ride more comfortably The review concludes that the changes make this engine an improvement over its predecessor 6 References edit Brasfield Evans 23 August 2016 Harley Davidson Unveils The Milwaukee Eight Engine For Touring Models Motorcycle com Retrieved 8 September 2016 2018 CVO STREET GLIDE Harley Davidson 2018 Retrieved February 21 2018 McDevitt For comparison a 1996 Geo Metro is rated at 49 HP and 55lbs ft torque all out of a three cylinder one litre engine This out of the 1996 Geo Metro Owners manual Jon March 20 2018 2018 Harley Davidson CVO Road Glide Dyno www cycleworld com Retrieved March 23 2018 a href Template Cite web html title Template Cite web cite web a CS1 maint numeric names authors list link Masker Mark 24 August 2016 10 Key Differences Between Harley s Milwaukee 8 amp Twin Cam Hot Bike Bonnier Corporation Retrieved 8 September 2016 2017 Harley Davidson Milwaukee Eight Engines Tech Brief Motorcycle com 2016 09 05 Retrieved 2017 05 03 Riding The 2017 Harley Davidson Milwaukee Eight Powered FL Models Cycle World Retrieved 2017 05 04 Retrieved from https en wikipedia org w index php title Harley Davidson Milwaukee Eight engine amp oldid 1221861246, wikipedia, wiki, book, books, library,
