Evolution engine
E924476
The Evolution engine is Harley-Davidson’s iconic air-cooled V-twin motorcycle engine introduced in the 1980s, credited with revitalizing the brand through improved reliability and performance.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Harley-Davidson engine
ⓘ
motorcycle engine ⓘ |
| alsoKnownAs | Evo engine NERFINISHED ⓘ |
| bore | 3.498 in (Big Twin 1340 cc variant) ⓘ |
| camshaftLocation |
four individual cams (Sportster variant)
ⓘ
single camshaft in crankcase (Big Twin) ⓘ |
| compressionRatio | approximately 8.5:1 to 9.0:1 (varies by model) ⓘ |
| configuration | V-twin ⓘ |
| coolingSystem | air-cooled ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| culturalSignificance | iconic Harley-Davidson V-twin design ⓘ |
| cylinderCount | 2 ⓘ |
| designedFor | cruiser motorcycles ⓘ |
| displacementRange |
1100 cc
ⓘ
1200 cc ⓘ 1340 cc ⓘ 883 cc ⓘ |
| emissionsCompliance | U.S. emissions standards of the 1980s and 1990s ⓘ |
| feature |
improved performance over Shovelhead engine
ⓘ
improved reliability over Shovelhead engine ⓘ reduced oil leaks compared to earlier Harley-Davidson engines ⓘ solid-state electronic ignition (on many models) ⓘ |
| fuelSystem |
carbureted (early versions)
ⓘ
fuel-injected (later versions) ⓘ |
| ignitionType | electronic ignition ⓘ |
| introducedInDecade | 1980s ⓘ |
| introducedInYear | 1984 ⓘ |
| introducedOnModel |
Harley-Davidson FXR
NERFINISHED
ⓘ
Harley-Davidson Softail NERFINISHED ⓘ Harley-Davidson Sportster NERFINISHED ⓘ |
| lubricationSystem | dry-sump ⓘ |
| manufacturer | Harley-Davidson NERFINISHED ⓘ |
| material |
aluminum cylinder heads
ⓘ
aluminum cylinders ⓘ |
| notableFor |
meeting stricter emissions and noise regulations of the 1980s
ⓘ
revitalizing Harley-Davidson brand image ⓘ |
| predecessor | Shovelhead engine NERFINISHED ⓘ |
| productionEnd | 1999 (Big Twin in most models) ⓘ |
| productionStart |
1984 (Big Twin)
ⓘ
1986 (Sportster variant) ⓘ |
| stillInProduction | yes (Sportster variants into the 21st century) ⓘ |
| stroke | 4.25 in (Big Twin 1340 cc variant) ⓘ |
| successor |
Milwaukee-Eight engine
NERFINISHED
ⓘ
Twin Cam engine ⓘ |
| usedBy | custom motorcycle builders ⓘ |
| usedIn |
Harley-Davidson Big Twin motorcycles
NERFINISHED
ⓘ
Harley-Davidson Sportster motorcycles NERFINISHED ⓘ |
| valvesPerCylinder | 2 ⓘ |
| valvetrain | overhead valve ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.