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Iron Head Sportsters (1957-1985)
Motor: Synergyn Racing Oil SAE
50 (use SAE 70 if doing extended high heat driving)
Trans/Primary: Synergyn
Racing Oil SAE 50
Shovelheads (1966-1984)
Motor: Synergyn Racing Oil SAE
50 (use SAE 70 if doing extended high heat driving)
Transmission: Syngear
II
Primary: Has dry clutch, self lubricated and
self return by engine.
Evolution Sportsters (883cc & 1200cc &
Unlimited)
1985 to Present
Motor: Synergyn
Racing Oil 15w50
Trans/Primary: Syngear
II
Unlimited Displacement Evolution Engines (1985 to Present)
Motor: Synergyn Racing Oil 15w50
Transmission: Syngear
II
Primary: Supershift
Big Twin Evolution 80 CID (1340cc), (1985 to
Present)
Motor: Synergyn Racing Oil 15w50
Transmission: Syngear
II
Primary: Supershift
Twin Cam 88 & 95 CID (1998 to Present)
Motor: Synergyn Racing Oil 15w50
Transmission: Syngear
II
Primary: Supershift
.....Notes.....
For all Harley Forks use Synergyn Racing Oil 5w30
For all Harley Grease needs use DY 1000
Synergyn Racing Oil will extend the change interval
to twice that of Harley Oil.
Dyno testing shows a 2 to 3 horsepower and 2 to 3 footpounds of torque increase over Harley Oil.
Synergyn lubricants will decrease engine
temperatures an average of 20 to 30 degrees.
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