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Harley-Davidson Fat Boy

From Wikipedia, the free encyclopedia

Harley-Davidson Fat Boy
FLFB
ManufacturerHarley-Davidson
ProductionSince 1990
ClassCruiser
Engine
  • Evolution (1990–1999)
    1,340 cc (82 cu in)
  • Twin Cam (2000–2017)[1]
    1,450 cc (88 cu in)
    1,584 cc (96.7 cu in)
    1,690 cc (103 cu in)
  •  Milwaukee-Eight (2018–2019)
    1,746 cc (107 cu in)
    1,868 cc (114 cu in)
(2020)
1,868 cc (114 cu in)
TransmissionChain (Primary) / Belt (final drive)
BrakesDisc/disc
Wheelbase1,636 mm (64.4 in)
FLSTF

The Harley-Davidson Fat Boy, is a V-twin softail cruiser motorcycle with solid-cast disc wheels.[2] Designed by Willie G. Davidson and Louie Netz, Harley-Davidson built a prototype Fat Boy in Milwaukee for the Daytona Bike Week rally at Daytona Beach in 1988 and 1989.[3][4] Fat Boys produced from 1990-2017 are coded FLSTF, and FLFB (& FLFBS) from 2018.

An oft-repeated false etymology claims that the name comes from a contraction of Fat Man and Little Boy, the atomic bombs dropped on Japan during WWII, as a symbolic insult to Japanese motorcycles.[5] This has been debunked, as the name "Fat Boy" actually comes from the observation that the motorcycle is somewhat wider than other bikes when viewed head-on.[6][5] In a 2015 interview, Scott Miller, Harley-Davidson's vice president of styling and product development, confirmed that the name was simply descriptive and had nothing to do with Harley's Japanese competitors.[7]

YouTube Encyclopedic

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  • Harley Davidson fat boy 1990 By KM X
  • The Harley Davidson Super Rally at Lincoln 2015 with S.H.A.G. BIGSLOB films.

Transcription

History and development

In the mid-1970s, mechanical engineer Bill Davis designed and built a predecessor to the Softail and patented the design in 1976.[8] Davis sold his patents, prototype, and tooling to Harley-Davidson in January 1982.[9] The Fat Boy was one of numerous Harley-Davidson models built on the Softail frame.

  • After 1994, the exhaust was made seamless.
  • In 1996 the master cylinder and switch gear were revised.
  • In 1999 a new 1,450 cc (88 cu in) Twin Cam engine for the 2000 model year was used. This necessitated a bespoke engine variant and changes to the frame.
  • In 2002 bullet-style indicators, alarm and immobilizer were added.[10]
  • In 2005 a 15th Anniversary version was sold with a "Screamin' Eagle" engine, special paint and custom wheels.[10]
  • In 2007 the displacement was increased to 1,584 cc (96.7 cu in)[10] and the transmission changed six speeds.[11]
  • The 2010 "Fat Boy Lo" FLSTFB had the lowest ever Harley seat height.[2]
  • In 2012 the Fat Boy received the new 1,690 cc (103 cu in) Twin Cam engine along with the rest of the softail range
  • 2018 Fat Boys have a redesigned softail frame with Showa front and rear suspension and new twin-counterbalanced  Milwaukee-Eight engines. The two 2018 variants comprise:
  • FLFB 1,746 cc (107 cu in) with 109 lb⋅ft (148 N⋅m), and
  • FLFBS 1,868 cc (114 cu in) with 119 lb⋅ft (161 N⋅m)[12]

The 2018 Softail frame has a modified swingarm with a Showa rear monoshock suspension mounted beneath the seat, replacing earlier twin shocks. So as to provide a more comfortable and better controlled ride with improved handling, the front forks contain a Showa "Dual Bending Valve" (SDBV),[13] a cartridge simulator using two valves to control compression and rebound damping, giving linear damping characteristics proportional to fork stroke speed. Harley-Davidson claims the 2018 chassis is stiffer and lighter than earlier Softail and Dyna platforms.[14] Further upgrades include an LED headlight and 18-inch "Lakester" rims, with wider 160mm front and 240mm rear tires.[15][16]

For 2020, the Fat Boy is only available with the Milwaukee-Eight 114 engine. Harley-Davidson also produced a 30th Anniversary edition for 2020.[17]

It is one of Harley-Davidson's best selling models and has appeared prominently in a number of TV shows and movies.[3] The Fat Boy earned a place in American pop culture after appearances in the movie Terminator 2: Judgment Day. One of the motorcycles used in Terminator 2 is displayed at the Harley-Davidson Museum. It appeared again in Terminator Genisys.[2][18][7][19]

See also

References

  1. ^ "MOTO USA". Retrieved 25 October 2016.
  2. ^ a b c "Harley Fat Boy History". Harley-Davidson. Retrieved 25 October 2016.
  3. ^ a b "Fat Boy a Harley bestseller and Hollywood favorite for 25 years". Milwaukee Wisconsin Journal Sentinel. Retrieved 28 October 2016.
  4. ^ "Vehicle Profile:25 Years of the Harley-Davidson Fat Boy". Harley-Davidson. Archived from the original on September 20, 2017. Retrieved May 28, 2017.
  5. ^ a b Luckhurst, Tim (14 November 2006). "Harley-Davidson FLSTF Fat Boy". The Independent. Archived from the original on 2022-05-09. Retrieved 13 December 2021.
  6. ^ Mikkelson, David (8 November 2000). "Harley-Davidson Fat Boy". Snopes.com. Retrieved 13 December 2021.
  7. ^ a b Barrett, Rick (5 August 2015). "Harley Fat Boy a screen and street star". The Detroit News. Retrieved 13 December 2021.
  8. ^ Masker, Mark. "Three decades of Softail". Hot Bike. Bonnier Corporation. Retrieved May 21, 2019.
  9. ^ Field, Greg (2003). "Bill Davis and the Design of the First Softail". Harley-Davidson Softail. St. Paul, Minnesota: MotorBooks International. p. 18. ISBN 0-7603-1063-7. Retrieved 2013-01-07. Davis relented and signed the deal on January 6, 1982, selling Harley the Sub Shock Wide Glide prototype, the patents for the design, all the tooling, and six complete Sub Shock frames.
  10. ^ a b c "Harley Fat Boy Development". Hogrides. Retrieved 25 October 2016.
  11. ^ "Harley Fat Boy Launch". Sump Magazine. Retrieved 25 October 2016.
  12. ^ Cameron, Kevin (August 22, 2017). "2018 Harley-Davidson Softail Cruisers Tech and Development". Cycle World. Retrieved September 17, 2017.
  13. ^ SDBV image [1]
  14. ^ "2018 Harley-Davidson Softail Cruiser Lineup". Cycle World. 2017. Retrieved September 9, 2017.
  15. ^ MacDonald, Sean (August 22, 2017). "This Is The New 2018 Harley-Davidson Softail Fat Boy". Cycle World. Retrieved July 9, 2018.
  16. ^ MacDonald, Sean (August 22, 2017). "This Is The New 2018 Harley-Davidson Softail Fat Boy". Cycle World. Retrieved July 9, 2018.
  17. ^ "2020 Harley-Davidson Fat Boy 30th Anniversary Unveiled". UltimateMotorcycling.com. Ultimate Motorcycling. 3 February 2020. Retrieved 18 February 2020.
  18. ^ "'Terminator' Fat Boy preserved". Motorbike Writer. 6 February 2014. Retrieved 26 October 2016.
  19. ^ Hinton, TJ (January 12, 2018). "Low Seat Height, Butt-Friendly Saddle, And A Smooth Ride". Top Speed. Retrieved July 9, 2018.

External links

This page was last edited on 4 November 2023, at 14:09
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