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sportster_history:1957_sportster [2017/03/13 01:51]
hippysmack [Engine]
sportster_history:1957_sportster [2022/01/27 04:35] (current)
hippysmack [Related Manuals and Documentation]
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 ====== 1957 Sportster ====== ====== 1957 Sportster ======
-===== Vehicle Identification Number (VIN) ===== 
- 
-  * The serial number is stamped on the left side of the engine case. The first 5 or 6 digits represent the year and model ((HD Parts Catalog XLH/​XLCH-1000 #(99451-78) )) 
- 
- 
 The Sportster XL was introduced as “a modern, up-to-date power plant.” {{  http://​www.motorcycleclassics.com/​~/​media/​Images/​MCC/​Editorial/​Articles/​Magazine Articles/​2011/​05-01/​1957 Harley-Davidson Sportster XL/​Sportster-1.jpg?​direct&​150}} The Sportster XL was introduced as “a modern, up-to-date power plant.” {{  http://​www.motorcycleclassics.com/​~/​media/​Images/​MCC/​Editorial/​Articles/​Magazine Articles/​2011/​05-01/​1957 Harley-Davidson Sportster XL/​Sportster-1.jpg?​direct&​150}}
  
  In 1952, the W models were replaced with the revered 45-cubic inch side-valve K series. The new K-models included an integrated four-cam engine and four-speed transmission design, along with foot shift, swingarm rear suspension, and telescopic front forks to compete with smaller, sportier motorcycles coming mainly from Great Britain. Essentially,​ the new XL motor was an updated K-model engine with larger displacement,​ overhead valves and higher compression. - Harley-Davidson Archives Copyright H-D ((http://​www.hotbikeweb.com/​harley-sportsters-paying-tribute-hot-rod-legend))  In 1952, the W models were replaced with the revered 45-cubic inch side-valve K series. The new K-models included an integrated four-cam engine and four-speed transmission design, along with foot shift, swingarm rear suspension, and telescopic front forks to compete with smaller, sportier motorcycles coming mainly from Great Britain. Essentially,​ the new XL motor was an updated K-model engine with larger displacement,​ overhead valves and higher compression. - Harley-Davidson Archives Copyright H-D ((http://​www.hotbikeweb.com/​harley-sportsters-paying-tribute-hot-rod-legend))
  
-Number ​produced1983((&#​91;&#​91;​http:&#​47;&#​47;​www&#​46;​caimag&#​46;​com&#​47;​forum&#​47;​showthread&#​46;​php?​5757-Help-with-1957-xl-sportster&#​47;​page2|http:&#​47;&#​47;​www&#​46;​caimag&#​46;​com&#​47;​forum&#​47;​showthread&#​46;​php?​5757-Help-with-1957-xl-sportster&#​47;​page2&#​93;&#​93;​))+**Model Production Numbers** 
 +  * XL - Number ​Produced1,983
  
-Original Price$1103+**Colors** 
 +  * Skyline Blue with Birch White tank panels. ((https://​www.harleykmodel.com/​technical/​colors/​index.html)) 
 +  * Pepper Red with Black tank panels. ((https://​www.harleykmodel.com/​technical/​colors/​index.html)) 
 +  * Birch White with Black tank panels. ((https://​www.harleykmodel.com/​technical/​colors/​index.html)) 
 +  * Black with Pepper Red tank panels. ((https://​www.harleykmodel.com/​technical/​colors/​index.html)) 
 +  * Options (no charge): ((https://​www.harleykmodel.com/​technical/​colors/​index.html)) 
 +    * Fenders to match tank panel when panel is a standard color. 
 +    * Birch White - (indicate either solid or with black panels). 
 +    * Any standard color without tank panels. 
 +  * Options (extra charge): ((https://​www.harleykmodel.com/​technical/​colors/​index.html)) 
 +    * Metallic Midnight Blue with Birch White tank panels. 
 +    * Spring Special: Nugget Gold.
  
-===== Specifications ​=====+====== ​Vehicle Identification ​====== 
 +==== Frame Numbers ==== 
 +There was no frame identification for purpose of ownership on 1957-1969 model Sportsters. \\ 
 +However, there were stampings on the different parts of the frame combined with certain features that can be used to date the frame. \\ [[techtalk:​ih:​body01w|Click Here]] to view Ironhead Frame Identification in the Sportsterpedia. \\
  
-{{  :​sportster_history:​1957-sportster-engine.jpg?200}}+==== Engine Serial Numbers ==== 
 +The only numbers for the purpose of identification were on the engine case. \\ 
 +  * For 1957-1961 models, the engine ​serial number is stamped on the left side of the engine case between the two cylinders. \\ First 4 or 5 digits are the year and bike model followed by a series of 4 or 5 numbers that established the individual serial number for each bike\\
  
-  * Model DesignationXL +[[sportster_history:99xx-01a|Click Here]] for more specific information on serial numbers and VINs in the Sportsterpedia\\
-==== Engine ====   +
-  * Engine type: 4 cycle Overhead Valves, 45 degree V2 ((Harley-Davidson 1957 - 1969 Service Manual)) +
-  *  +
-  * Kick start only ((1957-1969 HD FSM pg 4A-3)) +
-  * Displacement:​ 55 ci / 883 cc (900 cc advertised) ((1957-1969 HD FSM pg 1A-3)) +
-  * Compression:​ 7.5:1 ((1957-1969 HD FSM pg 1A-3)) +
-  * Hemi-spherical style heads  +
-  * Bore: 3 in / 76.2 mm ((1957-1969 HD FSM pg 1A-3))((https://​books.google.de/​books?​id=bvwDAAAAMBAJ&​pg=PA2&​num=100&​source=gbs_toc&​cad=2#​v=onepage&​q=sportster&​f=true)) +
-  * Stroke: 3.8125 in / 96.8 mm ((1957-1969 HD FSM pg 1A-3))((https://​books.google.de/​books?​id=bvwDAAAAMBAJ&​pg=PA2&​num=100&​source=gbs_toc&​cad=2#​v=onepage&​q=sportster&​f=true)) +
-  * 90 Degree Valve Angle +
-  * Horsepower: 42 @ 5,500rpm ((Harley-Davidson 1957 - 1969 Service Manual)) +
-  * Torque: 48 ft-lb @ 3600 RPM ((1957-1969 HD FSM pg 1A-3)) +
-  * 4 Cams  +
-  * Oil pump pressure: 6 psi @ 20 MPH ((1957-1969 HD FSM pg 3A-11)) +
-  * Fuel System: Linkert DC carburetor ((1957-1969 HD FSM pg 3F-7)) +
-  * Ignition: Ignition spark is produced by operation of a circuit breaker, ignition coil and spark plugs. The breaking of a single set of breaker points by a double lobe cam on the timer shaft determines the spark timingThe narrow lobe times the front cylinder while the wider lobe times the rear. ((1957-1969 HD FSM pg 1A-3))+
  
 +^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​797|}}|||
 +|  **Engine Serial Number for 1957 Sportsters** ​ |||
 +|**Model Year** \\ (first 2 digits)|**Model** \\ (next few digits) \\ (up to 4)|**Sequential** \\ **Serial#** \\ (remaining digits)|
 +|57|XL| (example) \\ 12345|
 +|  |||
 +|:::​|:::​|:::​|
 +|**Example**:​ (57XL 12345) indicates a 1957 XL model and is stamped on the Left Engine Case Between the Cylinders ((1953-1963 HD Parts Catalog backside of front cover))|||
 +|Example Serial Number on Engine Reads: 57XL12345|||
 +|  57  |  XL  |  12345  |
  
-==== Capacities ​===== +====== Related Manuals and Documentation ======
-  +
-  * Fuel capacity: 4 gal / 15.14 l((Harley-Davidson 1957 - 1969 Service Manual)) +
-  * Oil Capacity: 3 qts. / 2.83 l ((Harley-Davidson 1957 - 1969 Service Manual)) +
-  * Transmission Capacity: 1.5 pints / .71 l ((Harley-Davidson 1957 - 1969 Service Manual)) +
-  * MPG: 50mpg (est.)((http://​www.motorcycleclassics.com/​classic-american-motorcycles/​1957-harley-davidson-sportster.aspx))+
  
-==== Clutch ==== +Below are some suggestions for manuals for your ride\\ 
-  * Multi-Disc dry clutch-pack with alternate steel and fiber friction plates.((1957-1969 HD FSM pg 4A-3)) +__You should have, at minimum, a Factory ​Service Manual (FSM) and a Factory Parts Catalog for your year model__\\
-==== Dimensions ==== +
-  * Weight: 495 lb / 225 kg((http://​www.motorcycleclassics.com/​classic-american-motorcycles/​1957-harley-davidson-sportster.aspx)) +
-  * Wheelbase: 56.5 in / 143.51 cm ((Harley-Davidson 1957 - 1969 Service Manual)) +
-  * Overall Length: 87 in / 221 cm ((Harley-Davidson 1957 - 1969 Service Manual)) +
-  * Overall Width: 34 in / 86.36 cm ((Harley-Davidson 1957 - 1969 Service Manual)) +
-  * Overall Height: 40.5" ((1959-1964 HD FSM pg 1A-3)+
-  * Road Clearance: 2.5 in min / 6.35 c minimum, 4-5/8 in max ((1957-1969 HD FSM pg 1A-3)) +
-  * Saddle height 26-7/8“ to 29” +
-  ​+
  
-==== Drivetrain ==== +**Factory Service Manuals ​(FSM)**; \\ 
-  ​Constant Mesh - Foot shift +The FSM will have the most accurate information,​ procedures and specs. \\  
-  ​Speeds - 4 Forward +Clymer and Haynes make service manuals also for Sportsters but some of the information is in error to the factory FSMs. \\ 
-  * Number of Sprocket Teeth +And some of the information in the aftermarket manuals is vague in information or procedures but they may have more pictures\\ 
-    * Engine: 34 ((1957-1969 HD FSM pg 1A-3)+So it is generally said you can get use from both an aftermarket manual and the factory service manuals but get the factory manual first\\ 
-    ​Clutch: 59 ((1957-1969 HD FSM pg 1A-3)) +[[techtalk:miscres:miscres10|Click Here]] to view the Factory Service Manual page in the Sportsterpedia\\
-    ​Transmission:​ 21 ((1957-1969 HD FSM pg 1A-3)) +
-    * Rear Wheel: 51 ((1957-1969 HD FSM pg 1A-3)) +
-  * Gear Ratios +
-    * 1st: 10.63:1 ((1957-1969 HD FSM pg 1A-3)) +
-    * 2nd: 7.69:1 ((1957-1969 HD FSM pg 1A-3)) +
-    * 3rd5.82:1 ((1957-1969 HD FSM pg 1A-3)) +
-    * 4th: 4.21:1 ((1957-1969 HD FSM pg 1A-3))+
  
-==== Tires ==== +**Parts Catalogs**; \\ 
-  ​Front and rear: 3.50 x 18 +The Parts Catalog has part numbers of course but it also has exploded parts views\\ 
-  * Tire pressure (based on a rider weighing app150 lbs or more) +However, IT IS NOT INTENDED TO BE AN ASSEMBLY MANUAL\\ 
-  * For each 50 lbs of overload, increase rear tire pressure by 2 lbs., front by 1 lb((1959-1964 HD FSM pg 1A-3))but not exceeding max tire pressure    +And some of the exploded views are confusing or not related to each other on the same pages\\ 
-    Front14 psi / .96 bar +Butall in all, the exploded views do help finding what goes where\\ 
-    * Rear18 psi / 1.24 bar+Most of the fasteners listed in the relevant parts catalog individual pages have thread sizes and lengths also in case you need those\\ 
 +**NoteALL 1957-1978 PARTS CATALOGS LIST PARTS FOR PREVIOUS YEARS**. \\ Below is a simple list of original and "​latest edition parts catalogs
 +The in-between year books may show different part numbers for the same year model bike. \\ 
 +[[techtalk:miscres:​miscres12|Click Here]] to see the Factory Parts Catalog page in the Sportsterpedia for parts catalog uses and a full list of parts catalog numbers from 1957 to present. \\ 
 +(complete list of other parts catalogs and supplement catalogs that pertain to each year model on the bottom of that page) \\ 
 +Some often acquire several year model parts catalogs and that page will help you decide which ones are right for you\\
  
 +**Suggested Manuals**: \\
  
-===== Models ​=====+  * **Factory Service Manual (FSM)**: 
 +    * **Original**:​ None. The FSM program didn't begin until the 1959 season. \\ The 1959 FSM states "​Except for minor differences,​ it also applies to 1957-1958 model Sportsters. 
 +    * **Latest Edition**: 1959-1969 Sportster Service Manual (99484-69) 
 +  * **Factory Parts Catalogs**:​ 
 +    * **Original**:​ 1957 Spare Parts Catalog for all Sportster and K Models ​Catalog (99451-57) 
 +      * Issued February 15, 1957. 
 +      * Full parts catalog and lists parts available in 1957 for 1952-1957 models. 
 +      * Lists closest to original parts available for 1957 models. 
 +      * [[http://​www.harleykmodel.com/​literature/​spare-parts-catalogs/​documents/​99451-57/​99451-57.pdf|Click Here]] to download a PDF from Harley K Model site  (32.2mb) (( http:&#​47;&#​47;​www&#​46;​harleykmodel&#​46;​com&#​47;​literature&#​47;​spare-parts-catalogs&#​47;​documents&#​47;​99451-57&#​47;​99451-57&#​46;​pdf)) 
 +    * **Latest Edition**: 1954-1978 Sportster XLH/​XLCH-1000 Parts Catalog (99451-78B) 
 +      * Issued in 1989. 
 +      * Full catalog and lists parts available in 1989 for 1954-1978 models. 
 +      * Includes some parts that were not available in the -78A catalog. 
 +  * **Factory Owners Manual**: 
 +    * 1957 Sportster Rider Handbook (99466-57)
  
-  ​XL+**Pics of Manual Covers**. \\ 
 +Below are pics of used manual covers (original and latest editions) related to 1957 model Sportsters. \\ See the full list of pertinent catalogs in the link above. ​ \\ 
 +Click on any pic below to enlarge: \\
  
-===== Colors =====+|  1957 Rider Handbook \\ (99466-57) ​ | 
 +|{{:​sportster_history:​l003-om-1957_edition_cover_99466-57.jpg?​direct&​150|}}|
  
-  * Pepper Red / Black Tank Panels((http:&#​47;&#​47;​xlforum&#​46;​net&#​47;​vbportal&#​47;​forums&#​47;​showpost&#​46;​php?​p=696133&​postcount=6)) +|  1959 FSM (99484-59) ​((pics from a collection by The French Owl of the XLFORUM)) \\ loose leaf inside and outside covers (original) ​ ||  1959-1969 FSM (99484-69) \\ book bound cover (latest)  ​|  1957-1969 FSM (no part#) \\ (few page dates of Feb. 1970 | 
-  * Skyline Blue / Birch White Tank Panels((http:&#​47;&#​47;​xlforum&#​46;​net&#​47;​vbportal&#​47;​forums&#​47;​showpost&#​46;​php?​p=696133&​postcount=6)+|{{:sportster_history:​l001-fsm-1959_edition_cover_1st_for_1957-1964_loose_leaf_binders.jpg?​direct&200|}}|{{:​sportster_history:​l001-fsm-1959_edition_cover_99484-59_for_1957-1959_loose_leaf_inside.jpg?​direct&200|}}|{{sportster_history:​l001-fsm-1969_edition_cover_99484-69_for_1957-1969_book_bound.jpg?​direct&200|}}|{{:​sportster_history:​l001-fsm-1969_edition_cover_for_1957-1969.jpg?direct&200|}}|
-  * Birch White / Black Tank Panels(( http:/&#​47;​xlforum&#​46;​net&#​47;​vbportal&#​47;​forums&#​47;​showpost&#​46;​php?​p=696133&​postcount=6)) +
-  * Black / Pepper Red Tank Panels(( http://xlforum&#​46;​net&#​47;​vbportal&#​47;​forums&#​47;​showpost&#​46;​php?p=696133&postcount=6))+
  
-===== External Links =====+|  1952-1957 \\ Parts Catalog (99451-57) ​ |  1954-1978 \\ Parts Catalog (99451-78B) ​ | 
 +|{{:​sportster_history:​l002-pc-1957_edition_cover_99451-57_for_1952-1957.jpg?​direct&​200|}}|{{:​sportster_history:​l002-pc-1978_edition_cover_99451-78b_for_1954-1978.jpg?​direct&​200|}}|
  
-[[http://​www.harleykmodel.com/​literature/​spare-parts-catalogs/​documents/​99451-57/​99451-57.pdf|1957 ​Parts Manual]](( http:&#​47;&#​47;​www&#​46;​harleykmodel&#​46;​com&#​47;​literature&#​47;​spare-parts-catalogs&#​47;​documents&#​47;​99451-57&#​47;​99451-57&#​46;​pdf))+===== The Ironhead Multi-Year Parts Catalog Curse ===== 
 +Below is a summary of an article on the Sportsterpedia Parts Catalogs page regarding parts book errors. \\ 
 +You can also read the full article from this link: [[techtalk:miscres:​miscres12#​the_ironhead_multi-year_parts_catalog_curse|The Ironhead Multi-Year Parts Catalog Curse]]. \\ 
 +Due to all of the errors and non corrected editions, it's always a good idea to acquire several year parts catalogs ​surrounding your year model\\ 
 +Which year catalogs you'll need will depend on many factors but the main Parts Catalog page in the Sportsterpedia will help you decide which ones you need. \\ 
 +[[techtalk:​miscres:​miscres12|Click Here]] to see the Parts Catalog page. A full chart of all the parts catalogs ​made for Ironheads is at the bottom of the page. \\
  
-Back to [[:​sportster_history:​start|Sportster History Index]] +  * Not all multi-year catalogs will list factory installed parts on your bike. 
-The Sportster XL was introduced as “a modernup-to-date power plant” ​and weighing ​in at  2)+  * You may need several year catalogs ​to determine factory installed parts for your year model. 
 +  * Some parts first appeared or only appeared in Parts SupplementsService Bulletins or other literature 
 +  * Later catalogs may show parts for older models that were never factory installed on them. 
 +  * Some catalogs have missing parts and/or missing models ​in some parts listings. 
 +  * Some illustrations do not have a part number listed. 
 +  * Drawings may or may not look like your part number. 
 +  * Some exploded parts diagrams show the assembly in the wrong order or missing pieces. 
 +  * There may be misleading information about parts that fit your year model. 
 +  * Fastener lengths and thread pitch may change depending on catalog used. 
 +  * The MoCo knew about and tried to correct at least some of the parts catalog mistakes.
  
 +===== Search the Sportsterpedia =====
 +See the Navigation menu on the upper left of this page. \\
 +From there you can go to the main Ironhead section menu, the Reference section for general and in-depth procedures, and the Misc Resources for documentation. \\
  
 +===== Illustrations =====
 +The following illustrations are displayed for historic and period specific parts identification only. Refer to the original OEM documents for additional information. ((illustrations from various academic journals)) \\
 +Click on any illustration below to enlarge. \\
  
 +{{sportster_history:​1957_xl883_illust_engine.jpg?​300}} \\
 +\\
  
 +General dimension drawing for 1957-1965 XLH / XLCH frames: \\
 +This is a "short frame"​. Dims shown are 1957-1966 (all) and 1967-1969 XLCH. ((Dr Dick of the XLFORUM http://​xlforum.net/​forums/​showpost.php?​p=4370194&​postcount=58)) \\
  
 +{{:​sportster_history:​illust_-_frame_dims_-_general_-_1957-1965_xlh_xlch_the_french_owl.png?​direct&​400|}} ((illustration from a collection by The French Owl of the XLFORUM)) \\
  
 +====== Specifications ======
 +[[techtalk:​menu#​ironhead_technical_categories|Click Here]] for the main technical menu in the Sportsterpedia. \\
 +Also see the "Misc Resources"​ section on the bottom of that page for technical docs and information. \\
 +==== Model Designation ====
 +  * XL
  
 +==== Dimensions ====
 +  * Wheelbase: 56.5 in / 143.51 cm ((Harley-Davidson 1957 - 1969 Service Manual))
 +  * Overall Length: 87 in / 221 cm
 +  * Overall Width: 34 in / 86.36 cm
 +  * Overall Height: 40.5 in
 +  * Saddle height 26-7/8 in to 29 in / 68.26 cm to 73.66 cm
 +  * Road Clearance: 2.5 in to 4-5/8 in / 6.35 cm to 11.74 cm
  
 +==== Engine ====  ​
 +  * Engine type: 4 cycle Overhead Valves, 45 degree V2 ((Harley-Davidson 1957 - 1969 Service Manual))
 +  * Hemi-spherical style heads
 +  * Displacement:​ 53.9 ci / 883 cc (900 cc advertised)
 +  * Compression Ratio: 7.5:1
 +  * Bore: 3 in / 76.2 mm
 +  * Stroke: 3.8125 in / 96.8 mm
 +  * Horsepower: 42 @ 5,500 rpm
 +  * Taxable Horsepower: 7.2
 +  * Torque: 48 ft/lb @ 3.600 RPM
 +  * Weight: 204 lbs.
 +  * 4 Cams 
 +  * [[techtalk:​ih:​oil03|Gear driven type oil pump]]. \\ Oil pump pressure (gauge mounted in place of oil pressure switch):
 +    * Idle, with spark retarded (Min: 3-7 psi)
 +    * Normal riding conditions: 10-14 psi (6 psi at 20 mph) 
 +  * [[techtalk:​ih:​engctl01|Ignition]]:​ Battery Ignition System (circuit breaker/​points/​timer/​distributor)
 +    * Point Gap: .020"
 +  * Dwell: 90° at 1000 RPM
 +  * Ignition Timing
 +    * Advanced: 45° (11/​16"​) BTDC
 +    * Retarded: 15° (5/​64"​) BTDC
 +  * Spark Plugs
 +    * #4 for everyday use.
 +    * #5 for hard service.
 +      * Gap: .025"​-.030"​
 +  * [[techtalk:​ih:​carb01#​linkert_model_m_and_dc_carbs_1957-1965|Fuel System]]: Linkert DC carburetor.
 +  * Starter: Kick start only
  
- +==== Capacities ===== 
 +  * Fuel capacity: 4.1 gal / 15.52 l((Harley-Davidson 1960 Sportster Service Manual)) 
 +  * Oil Capacity: 3 qts. / 2.83 l 
 +  * Transmission Capacity: 1.5 pints / .71 l
  
 +==== Clutch ====
 +  * Multi-Disc dry clutch-pack with alternate steel and fiber friction plates.((1957-1969 HD FSM pg 4A-3))
  
- 55cid 7.5:1 Compression,​ hemi-spherical style heads, 90 degree valve angle, OHV V-twin, 4 cams 4)5) +==== Drivetrain ==== 
- +  * Constant Mesh right side foot shift ((1957-1969 HD FSM pg 1A-3)) 
- +  * Speeds ​4 Forward 
- 48 ft-lbs of torque at 3600 RPMs. +  * Number ​of Sprocket Teeth 
- +    * Engine: 34  
- +    * Clutch: 59 
- ​1-11/​16“ Dia. intake valves 6)  +    * Transmission:​ 21 
- +    * Rear Wheel: 51 
- +  ​* ​Standard ​Gear Ratios 
- 3”x3.8“ bore and stroke  +    * 1st: 10.63:1 
- +    * 2nd: 7.69:1 
- +    * 3rd: 5.82:1 
- ​Piston Displacement (883cc53.9 cu. in.  +    * 4th4.21:1
- +
- +
- ​Kickstart only +
- +
- +
- 18” wheels standard +
- +
- +
- ​Speedometer designed into the sheet metal of the fork shroud. +
- +
- +
- ​Telescoping front forks +
- +
- +
- Fuel tank capacity 4.4 gallons. +
- +
- +
- Oil tank (3 quartslocated under the seat on the right side using a recirculating oiling system +
- +
- +
- Two brush generator w two-unit voltage regulator powering a six volt system +
- +
- +
- ​Coil-over shocks +
- +
- +
- '​Jubilee'​ trumpet horn mounted on the right side of the engine, power pack on the left side +
- +
- +
- Paint color, 'HD 100' enamel +
- +
- +
- ​Standard ​solo seat +
- +
- +
- ​Options included +
- +
- ​Windshield +
- +
- +
- ​Saddlebags +
- +
- +
- Dual seat +
- +
- +
- +
- Front drum brakes (operated by a lever on the left handlebar) +
- +
- +
- Rear drum brakes (operated by a foot pedal on the left side) +
- +
- +
- Rear swingarm with Timken bearings at pivots+
- +
- +
- ​Short-barrel Linkert Carburetor  +
- +
- +
- ​Engine ID numbers on a pad located on the left side between the cylinders +
- +
- +
- ​Straight retained bearings on gear shaft +
- +
- +
- ​Roller valve lifters were called (High Speed Racing Tappets) +
- +
- +
- Spark plugs were air cooled and could be dis-assembled +
- +
- +
- Cams ramped on both closing and opening side +
- +
- +
- ​Stellite-faced exhaust valves +
- +
- +
- ​Aluminum alloy pushrods extend up through the covers to reach the rocker +
- +
- +
- ​Cam-ground aluminum pistons w/ chrome plated top ring, non plated center ring and u-flex lower oil ring +
- +
- +
- ​Aluminum rocker boxes enclose valves and rockers +
- +
- +
- Cast iron barrels and heads  +
- +
- +
- ​Single-unit construction of engine and transmission +
- +
- +
- Four speed transmission with a foot shifter on the right side +
- +
- +
- Seven plate clutch (operated by a lever on the left handlebar) +
- +
- +
- ​Primary chain and transmission are lubed by an oil bath separate from engine oil+
- +
- +
- ​Double tapered Timken roller bearings on sprocket shaft +
- +
- +
- Only Year: +
- +
- ​Woodruff keys for camshaft gears +
- +
- +
- 6 splines on drive gear/ second gear shaft+
  
 +==== Tires ====
 +Tire pressure (based on a rider weighing app. 150 lbs or more). \\
 +For each 50 lbs of overload, increase rear tire pressure by 2 lbs, front by 1 lb ((1959-1964 HD FSM pg 1A-3)) but not exceeding manuf max tire pressure. \\ 
  
- Choke control operated by a left side lever+  * XL: 
 +    * Front: 3.50 x 18 (tire pressure: 14 psi / .96 bar) 
 +    * Rear: 3.50 x 18 (tire pressure: 18 psi / 1.24 bar)
  
  
- Tank emblem: Round plastic disc with 2 silver and red quadrants with Red Harley-Davidson name over it, press riveted to the tank.+----
  
 +Back to [[sportster_history:​99xx-01|Sportster History Index]]