1970 Harley-Davidson FL/FLH Shovelhead: First-Year Cone-Motor Electra Glide

The 1970 Harley-Davidson Shovelhead occupies a very specific and important place in Milwaukee history: it is the first production year of the cone-motor Big Twin. The Shovelhead top end had arrived in 1966, but those early machines used a lower end closely related to the Panhead, with a generator mounted ahead of the front cylinder. For 1970, Harley-Davidson introduced new alternator crankcases and the now-familiar cone-shaped timing cover, establishing the mechanical architecture that would carry the Shovelhead through the remainder of its production life.

This was not a new model in the showroom sense so much as a major engineering change within the FL and FLH Electra Glide line. To collectors, restorers, and chopper-era historians, however, the distinction is crucial. A 1970 cone Shovelhead is the bridge between the generator-era Big Twin and the long-running 1970-1984 cone-motor Shovelhead family.

Best Known For: the 1970 Harley-Davidson Shovelhead is best known as the first-year alternator, cone-cam-cover Big Twin Shovelhead and a key transition machine in FL/FLH Electra Glide history.

Quick Facts

The following table summarizes the main reference points for the 1970 cone-motor Shovelhead. It focuses on information useful to an owner, buyer, restorer, or collector rather than speculative performance claims.

The important point is not that the 1970 machine looks dramatically different from every Electra Glide around it. Its significance is in the crankcases, charging system, timing cover, and identification details that separate it from the 1966-1969 generator Shovelheads.

Why the 1970 Cone Shovelhead Matters

The 1970 Harley-Davidson Shovelhead deserves its own page because it marks the point at which Harley-Davidson’s postwar Big Twin entered its second modern phase. The 1965 Electra Glide had already brought electric starting to the FL line, and the 1966 Shovelhead had introduced new aluminum cylinder heads with better breathing and cooling than the Panhead. The 1970 redesign completed the package by moving the Big Twin away from the generator-era crankcase layout.

The cone motor matters to collectors because it is easy to misunderstand. A 1969 and a 1970 Shovelhead may both be called Shovelheads, both may be 74 cubic inch FLH machines, and both may wear similar touring equipment, but they belong to different mechanical generations. For the restoration-minded buyer, that difference affects crankcases, cam cover, charging system, ignition layout, primary components, wiring, and value judgments about originality.

It also matters culturally. The cone Shovelhead became the engine of the 1970s Harley touring world and a foundation of the custom and chopper scene. Many were ridden hard, modified repeatedly, converted to aftermarket carburetors, stripped of touring equipment, or rebuilt around non-original cases and frames. A correct 1970 example is therefore more than a used old Electra Glide; it is a benchmark for the start of the cone-motor era.

Historical Context and Development Background

By 1970, Harley-Davidson was under intense pressure from several directions. The company still owned the American heavyweight touring and police market in a way no foreign manufacturer could easily duplicate, but the motorcycle world was changing rapidly. Honda’s CB750 had arrived with electric starting, a front disc brake, four cylinders, and a level of refinement that forced every established manufacturer to reassess its engineering pace.

Harley-Davidson’s priority was not to build a CB750 equivalent. The FL and FLH remained large-capacity road motorcycles aimed at riders who valued torque, weather protection, luggage, serviceability, and police-duty durability. The company’s Big Twin customers expected floorboards, a broad saddle, a large fuel tank, a relaxed engine speed, and the unmistakable cadence of a 45-degree V-twin.

The 1970 cone-motor redesign should be read in that context. It was not a sporting revolution, but a production and serviceability evolution of a proven touring machine. The alternator charging system and revised crankcases moved the Big Twin into a configuration better suited to electric-start touring equipment, lighting loads, and the accessory-heavy Electra Glide identity.

The timing is also significant because Harley-Davidson had entered the AMF period following the 1969 acquisition. Serious collectors sometimes over-simplify AMF-era history, but the 1970 machine is best understood as a continuation of engineering work already underway rather than a crude break from earlier Milwaukee practice. It is both late old-Harley and early modern Shovelhead.

Engine and Drivetrain

The 1970 Shovelhead used Harley-Davidson’s 74 cubic inch air-cooled OHV 45-degree V-twin, with the shovel-shaped rocker boxes that gave the family its nickname. The defining change was below the cylinders: the new alternator crankcase and cone-shaped timing cover replaced the generator Shovelhead layout used from 1966 through 1969.

In collector language, this is the first cone Shovelhead. The term refers to the cam and timing cover on the right side of the engine, whose tapered shape is visually distinct from the earlier generator-engine cam cover arrangement. Just as important, the absence of the forward-mounted generator changes the entire identity of the right and front portions of the engine.

Fuel delivery on 1970 machines is commonly associated with the Tillotson diaphragm carburetor, though surviving motorcycles often carry later Bendix, Keihin, or S&S replacements. Ignition was by battery-and-coil with contact breaker points, and lubrication was dry-sump with a separate oil tank. The drivetrain retained the traditional Harley Big Twin format: primary chain, multi-plate clutch, four-speed gearbox, and chain final drive.

The engine/drivetrain table below includes core mechanical information that is broadly documented for the 1970 FL/FLH Shovelhead family. It deliberately avoids horsepower and torque figures because published period ratings and later secondary-source figures are not always presented on the same basis.

For restorers, the carburetor and ignition deserve special scrutiny. Many riders replaced the original carburetor for easier tuning, and many later owners converted points to electronic ignition. Those changes may make a rider more convenient, but they alter the originality profile of a first-year cone motor.

Chassis, Suspension, and Braking

The 1970 FL and FLH were heavyweight touring motorcycles built around Harley-Davidson’s steel swingarm Big Twin chassis. The stance is unmistakably Electra Glide: large tanks, deep fenders, wide bars, floorboards, nacelle-style front lighting, and an engine visually dominating the center of the motorcycle. The machine’s visual mass was not accidental; it projected authority in police fleets and long-distance comfort in civilian touring use.

The suspension was conventional but appropriate to the mission: telescopic hydraulic fork in front and twin rear shock absorbers at the swingarm. Braking remained by drums at both ends, an important period detail because later Shovelheads would move into the disc-brake era. On a correct 1970 restoration, front and rear drum equipment is part of the machine’s identity.

The table below gives the chassis and equipment facts most likely to matter when identifying or evaluating a 1970 cone Shovelhead.

Because so many FL/FLH machines were used as working motorcycles, touring rigs, or custom donors, the chassis equipment on surviving examples must be assessed carefully. A correct 1970 motorcycle should not be judged only by whether it looks old; the fork, brake, wheel, nacelle, tanks, fenders, and frame details all have to agree with the engine and title history.

Riding Experience and Mechanical Character

A sound 1970 Shovelhead feels like a large mechanical device because that is exactly what it is. The starting ritual depends on tune, carburetor condition, battery strength, and whether the motorcycle retains period equipment, but the experience is dominated by fuel, spark, compression, and the deliberate engagement of a big flywheel V-twin rather than by any modern sense of instant compliance.

At idle, the 45-degree engine gives the familiar uneven Harley cadence, with audible valvetrain, primary, and gear sounds all part of the mechanical vocabulary. The throttle response is governed by heavy flywheels and long-stroke torque rather than quick-revving urgency. When properly tuned, the engine pulls with a broad, low-speed authority that suits relaxed road work and two-lane touring.

The four-speed gearbox asks for a firm, unhurried shift. The clutch is part of the period experience: not fragile when correctly assembled, but not modern-light either. The motorcycle rewards a rider who understands mechanical sympathy, maintains primary adjustment, and avoids treating the transmission like a contemporary close-ratio sporting box.

Braking is the area where modern riders must recalibrate fastest. The drum brakes can be adequate when properly set up, but they do not deliver the immediacy or repeated hard-stop confidence of later disc-brake machines. The chassis is happiest when ridden with planning, smooth lines, and respect for the motorcycle’s weight and period tires.

On the road, the Electra Glide identity matters more than raw acceleration. The 1970 FLH is about torque, road presence, and long-legged stability, not café-racer reflexes. It was built for American distances, police patrol work, and riders who accepted vibration and mechanical sound as part of the bargain.

Identification and Originality

Correctly identifying a 1970 cone Shovelhead begins with the engine and frame numbers. Harley-Davidson moved into the 1970-1980 style VIN format in this period, and 1970 Big Twins are associated with matching engine and frame numbers. The commonly cited format uses a model code at the beginning and an H0 suffix for the 1970 model year; any purchase should be checked against factory-style stampings, title documents, and known Harley-Davidson numbering references.

For the 1970 FL/FLH, the key model-code distinction is between FL and FLH. In the 1970-1980 numbering system, 1A is commonly associated with FL/FLP 1200 models, while 2A is commonly associated with FLH 1200 models. Buyers should avoid relying on a single internet decoding chart when money is serious; the number style, location, character shapes, and title trail matter as much as the decoded letters.

Visually, the first-year cone motor should show the alternator-era crankcase and the conical right-side timing cover, not the earlier generator Shovelhead layout. The absence of the forward generator is a major clue. The left side should also be evaluated for period primary equipment, starter arrangement, and signs of later conversion.

Common swapped parts include carburetors, exhausts, seats, saddlebags, handlebars, ignition systems, wheels, brakes, tanks, and complete front ends. Chopper culture claimed many cone Shovelheads, and police or touring bikes were often rebuilt for function rather than future judging. Reproduction parts are widely available, but reproduction does not equal original; a restored motorcycle should be described honestly if it uses replacement sheetmetal, aftermarket cases, later forks, or modern electrical upgrades.

Paint and badging require the same caution. Period-correct colors and decals can be replicated, and high-quality repainting may look convincing at a glance. Serious collectors look for documentation, old photographs, dealer paperwork, police-service records where applicable, and consistency across the engine, chassis, and equipment.

Model Code and Variant Breakdown

The 1970 cone Shovelhead was not a broad family in the way later 1970s Big Twins would become after the FX Super Glide appeared. For 1970, the relevant Big Twin Shovelhead discussion centers on FL and FLH Electra Glide models, with police equipment and export-market specification handled through orders and equipment rather than a fundamentally different engine family.

The FX Super Glide, often associated with the cone Shovelhead story, did not arrive until the following model year. That distinction is important: a 1970 cone Shovelhead is an FL/FLH-era transition machine, not an FX factory custom.

Performance and Dimensional Specifications

Period and later sources do not always present 1970 Shovelhead performance figures on a consistent basis. Horsepower ratings, where quoted, may reflect factory gross figures, model assumptions, compression differences, or later secondary-source repetition. For that reason, this article does not treat a single horsepower or torque number as definitive.

The same caution applies to top speed, standing-start acceleration, and curb weight. Touring equipment, police gear, windshields, saddlebags, exhausts, gearing, tune, and rider weight all affect real-world results. What is consistently documented and historically meaningful is the specification class: a 74 cubic inch OHV Big Twin, four-speed gearbox, chain final drive, drum brakes, and heavyweight touring chassis.

In period use, the FLH was not judged against middleweight sport machines by quarter-mile numbers. It was judged by whether it could start every morning, run long distances, haul equipment, carry a passenger, idle in traffic, and deliver the kind of low-speed torque police departments and American touring riders expected.

Compared With Related Harley-Davidson Models

1966-1969 Generator Shovelhead

The most important comparison is with the 1966-1969 generator Shovelhead. Those earlier machines have Shovelhead top ends but retain the generator-era lower-end layout, making them visually and mechanically distinct from the 1970 cone motor. Collectors often separate the two groups as generator Shovelheads and cone Shovelheads.

Generator Shovelheads appeal to riders who like the closer link to Panhead-era architecture. The 1970 appeals because it begins the longer-lived alternator/cone-motor generation while retaining early drum-brake Electra Glide character.

1971 FX Super Glide

The 1971 FX Super Glide used the cone Shovelhead engine in a new factory-custom format that combined Big Twin power with a leaner chassis and styling brief. It is often discussed in the same breath as the 1970 engine change, but it is not a 1970 model. The 1970 FL/FLH is the engine-generation starting point; the 1971 FX is the styling and model-line departure.

Later 74-Inch Cone Shovelheads

Later 1970s 74-inch cone Shovelheads share the broad engine family but differ in details such as carburetion, braking, emissions equipment, electrical components, and model offerings. The later the motorcycle, the less it represents the pure first-year transition. For a collector, 1970 has importance because it is the beginning of the cone-motor sequence, not merely another used Shovelhead.

1978-and-Later 80-Inch Shovelheads

Harley-Davidson introduced the 80 cubic inch Shovelhead during the late 1970s period, creating another common point of confusion for buyers. A 1970 FL/FLH should be evaluated as a 74 cubic inch machine unless documentation proves otherwise, and an 80-inch top-end or later engine replacement changes the motorcycle’s originality profile substantially.

Restoration and Ownership Notes

Parts support for cone Shovelheads is generally strong, thanks to decades of factory, aftermarket, and custom-market demand. That does not mean restoration is simple. The difficult work is not finding a part that fits; it is finding the correct part, finish, date-appropriate component, and configuration for a 1970 first-year machine.

Engine rebuilding requires attention to crankcase condition, flywheel assembly, oiling system integrity, tappet blocks, rocker boxes, cylinder head condition, and evidence of past performance modifications. Shovelheads are tolerant engines when built carefully, but they punish casual assembly, poor oil control, overheated heads, incorrect ignition timing, and intake leaks.

The primary drive, clutch, four-speed transmission, and chain final drive are all serviceable by experienced Big Twin specialists. Wear in the clutch hub, primary alignment, shift linkage, kicker components where fitted, and transmission mainshaft area should be checked. Leaks are common on neglected motorcycles, but a properly assembled Shovelhead need not mark its territory as a condition of existence.

Originality is the larger issue. A first-year cone-motor FLH with correct cases, matching frame and engine numbers, period touring equipment, original-style carburetion, correct drum brakes, and convincing documentation occupies a different collector category from a 1970 title wrapped around a later custom build. Both may be enjoyable motorcycles, but they are not the same historical object.

Buyer and Restoration Inspection Points

A 1970 cone Shovelhead should be inspected as both a motorcycle and a document. The machine may run well and still be historically compromised, or it may be mostly original but require a complete mechanical rebuild. The table below highlights the areas that experienced Harley restorers tend to examine first.

The best purchases are usually the motorcycles with boring paperwork and coherent details. A dramatic paint job, polished engine, or expensive accessory list cannot compensate for suspect cases, altered numbers, or a frame that has been through several lives as a chopper.

Collector and Market Relevance

The 1970 cone Shovelhead has appeal in several overlapping markets. Harley-Davidson historians value it as the first alternator/cone Big Twin. Electra Glide collectors value it as an early drum-brake Shovelhead touring machine. Custom-culture enthusiasts value the cone motor because it became one of the defining engines of 1970s choppers and club motorcycles.

Rarity must be discussed carefully. Exact production totals by surviving configuration are not consistently documented in a way that allows confident claims for every variant, and many motorcycles have been modified, rebuilt, or re-titled over decades. What is clear is that uncut, well-documented, substantially correct 1970 FL and FLH examples are far less common than the general survival of Shovelhead engines might suggest.

Collectors typically value matching numbers, correct 1970 identification, original or accurately restored touring equipment, unaltered frames, factory-style finishes, and credible documentation. Police provenance can add interest when supported by records, but police-style accessories alone are not proof. Conversely, a well-built period chopper may have cultural appeal, but it should not be represented as an original Electra Glide restoration.

Cultural Relevance

The 1970 Shovelhead sat at the meeting point of official Harley-Davidson culture and the emerging custom world. In stock form, it was a police and touring motorcycle: large, authoritative, durable, and unmistakably American in purpose. In stripped form, the cone Shovelhead became a staple of the 1970s custom scene because it offered the right engine silhouette, abundant torque, and a supply of used touring bikes available for transformation.

Police use is especially relevant to the FL/FLH story. Harley-Davidson’s relationship with law-enforcement fleets gave the Electra Glide a public presence far beyond ordinary retail sales. The sight of a Shovelhead FLH with windshield, radio box, solo saddle, and police lighting became part of the American roadscape.

Racing was not the purpose of the 1970 FL/FLH Shovelhead. Harley-Davidson’s competition identity in the period was more closely tied to flat-track machinery and, soon after, the XR platform. The 1970 cone-motor Electra Glide belongs instead to the history of touring, policing, long-distance ownership, and the custom movement that reshaped Harley-Davidson’s public image.

FAQs

What makes the 1970 Harley-Davidson Shovelhead a cone motor?

The 1970 model year introduced the alternator-era Big Twin crankcases and the conical right-side timing cover. Earlier 1966-1969 Shovelheads used the generator-style lower end, so collectors commonly call the 1970-and-later design the cone Shovelhead or cone motor.

Was the 1970 Shovelhead available as an FLH?

Yes. The 1970 FLH Electra Glide was part of the 74 cubic inch Shovelhead Big Twin line. In the 1970-1980 VIN system, the 2A model code is commonly associated with FLH 1200 models.

How is a 1970 FL different from a 1970 FLH?

Both are 74 cubic inch Shovelhead Big Twins in this context, but FL and FLH represent different specifications within the Electra Glide family. The FLH is generally treated as the higher-spec version and is commonly identified by the 2A model code, while FL/FLP 1200 identification is commonly associated with 1A.

Did the 1970 Harley-Davidson Shovelhead have disc brakes?

No. The 1970 FL/FLH Shovelhead used drum brakes front and rear. Later Shovelheads moved into the disc-brake period, so disc-equipped 1970 examples should be examined for later front-end or brake conversions.

What carburetor should a 1970 Shovelhead have?

1970 FL/FLH Shovelheads are commonly associated with Tillotson diaphragm carburetion. Many surviving motorcycles have been converted to Bendix, Keihin, or S&S carburetors, which may improve ease of tuning but change the originality profile.

Are matching numbers important on a 1970 cone Shovelhead?

Yes. Because 1970 sits at an important numbering transition, engine and frame numbers, title documents, stamping style, and model-code consistency are central to value and authenticity. A running motorcycle with questionable numbers can be far harder to resolve than one needing mechanical work.

Is the 1970 Shovelhead a good restoration candidate?

It can be, provided the foundation is sound. Correct cases, an unaltered frame, coherent VIN documentation, restorable drum-brake touring equipment, and period-correct major components matter more than cosmetic shine. Parts availability is good, but first-year correctness requires careful research.

Collector Takeaway

The 1970 Harley-Davidson Shovelhead matters because it is the first page of the cone-motor Big Twin story. It is not merely a 74-inch Electra Glide with an old engine; it is the exact point where Harley-Davidson’s Shovelhead moved from generator-era architecture into the alternator, cone-cover layout that defined Milwaukee’s heavyweight motorcycles through the 1970s and into the early 1980s.

For the collector, the best 1970 examples have a tension that later bikes cannot duplicate. They retain drum-brake Electra Glide gravity and old-Harley touring manners, yet carry the mechanical identity of the long-running cone Shovelhead generation. A correct, documented 1970 FL or FLH is therefore a transition machine in the best sense: mechanically consequential, visually authoritative, and historically specific enough that details decide everything.