About the Ironhead Sportster

17 Фев 2015 | Author: | Комментарии к записи About the Ironhead Sportster отключены

About Ironheads


The were developed from the K in 1957. This was in the heyday of racing. At 900CC, the 57 Sportster was the of the Hill which kept records against the British by Ariel, Norton, BSA, and

The only bike which was powerfull was the Vincent Black The Ironhead Sportster is a 45degree with Hemisphereical combustion and High Dome pistons. design was practical until the in the octane rating of gasoline.

The is prone to Ping or Detonation of the mixture causing performance with todays unleaded The problem can be minimized by proper or eliminated by conversion to dual plugs.

The Ironhead preceeded the EVO Sportster was introduced in 1985. The Sportster is the running production model of any

The bike I have is a 1975 It was produced when AMF (The mega company) owned HD. were approximately 5300 produced in 1975.

The engine is 61C.I.D. (1000cc). This had upgraded in 1968 from 900cc.

The Sportster displacement marking on the side Primary Cover is in cc of the tradiditonal C.I.D.

Harley continues to make the Sportster the traditonal overhead valve cam configuration. There are four in the Sportster.

Brief History

Davidson made Flat (WL) engines with the on the side of the cylinder as their product line up until the of the Knuckle head (Model EL, 61 in 1936 (through 1947). WWII years saw the Overhaead EL prove to be a highly reliable and performance engine. The EL was followed by the FL Pan (1947-1965).

The FL was introduced as a 74C.I.D engine, was also available in th 80C.I.D.

Harley-Davidson XRTT750 Sportster TT

However, they continued the smaller WL 45C.I.D flat up through the mid 70s. It was primairly in Service Cars (Trikes) by police for parking ticket along with Ice Cream

The racing market was addressed by the until the introduction of the KH model in The KH was different in that it was of the integral type. All Harley Davidsons in the had a seperate engine and transmission.

The KH was upgraded with overhead and introduced in 1957 as the XL.

As with models from Harley the XL has been offered in several over the years.

The first was the H model, or XLH. The H designated a powerful engine due to changes in the and compression. This was followed by the C XLC which was a special version for

Next was the XLCH which was a only (no electric Start) performance version. The last was the XLCR Cafe Racer.

also made true bikes including the 750cc XR for TT

The 750cc XR was also used by Knievel for many of his stunts.

Harley-Davidson XRTT750 Sportster TT
Harley-Davidson XRTT750 Sportster TT
Harley-Davidson XRTT750 Sportster TT
Harley-Davidson XRTT750 Sportster TT
Harley-Davidson XRTT750 Sportster TT
Harley-Davidson XRTT750 Sportster TT
Harley-Davidson XRTT750 Sportster TT

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