Installing Spark Plugs

Before turning spark plugs into cylinder heads, check condition of threads in head and cm plug. Soften deposits in cylinder head with penetrating oil and clean out with tap or old plug.

Install new spark plug gasket and turn plug down finger tight. Tighten to 15 pounds with torque wrench or 3/4 of a turn.

Check and adjust engine idle speed and mixture setting after installing new set of plugs if necessary.

SPECIFICATIONS FOR SETTIKG D2LC0-REHY REGULATORS USED ON KARLSY-DAVIDSOir MOTORCYCLES

All electrical checks and adjustments must be made with regulator at operating temperature. This requires about 15 minutes operation with generator charging approximately 5 amperes.

Delco-Remy number 1118224 Harley-Davidson part number 8575-41 current end voltage regulator - original equipment up to 1S48 with 2-brush radio generators, not fan-cooled. (Regulator 1110224 no longer available on parts order. Superseded by 1118327.)

Voltage regulator air gap Current regulator air gap Cutout relay air gap Cutout relay point opening

Cutout relay closing voltage 6.6

Voltage regulator setting (volts) 7.5

Current regulator setting (amp.) 13.0

Delco-Remy number 1118527 Harley-Davidson part number 8575-41 current and voltage regulator - this regulator was never used as original equipment but supersedes Delco-Remy regulator 1118224 for replacement requirements.

Voltage regulator air gap .075 in.

Current regulator air gap .075 in.

Cutout rclav- air gap .020 in.

Cutout relay point opening .020 in.

Cutout relay closing voltage 6.6

Voltage regulator setting (volts) 7.5

Current regulator setting (amp.) 13.0

Delco-Remy number 1118388 Harley-Davidson part nufaber 74511-51 current and voltage regulator - uBed with 2-brush fan-cooled radio generator equipped 1951 model motorcycles.

Voltage regulator air gap .075 in.

Current regulator air gap .075 in.

Cutout relay air gap .020 in.

Cutout relay point opening .020 in.

Cutout relay closing voltage 6.6

Voltage regulator setting (volts) 7.5

Current regulator betting (top.) 18.0

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