EnDuraLast - BMW Airhead Replacement 8 - Tooth Starter ; 12 41 1 357 500 / EnDuraLast 1969-1976

The EnDuraLast starter has 70% to 140% more cranking torque than a new Bosch starter with 20% less amperage draw. Your new EnDuraLast starter will provide years of reliable service due to it’s efficient modern technology and design producing the increased power rating. The key features are:

Magnet retention includes spring clips to ensure magnets do not become loose.
New technology provides lighter (6.5 pounds) starter motor with 70 % higher output than the old Bosch design.
More efficient high strength permanent magnets that replace conventional field coils, requiring less amperage to turn the starter over.This allows the battery to provide increased voltage and amperage to the ignition system resulting in faster rpm turnovers and quicker starts with less amp draw on the battery.
Will operate where other imitation conversion starters will not due to the Denso gear-reduction starter design having a large solenoid with sliding drive-gear assembly designed for automotive applications with large battery reserves.
Features a low-voltage solenoid "pull-in" requirement.
Permanent magnet style starter will also retrofit older Bosch field coil starters (0.7 Kw).
This starter is application-designed for small batteries.

This aftermarket replacement starter is a quality product manufactured to Original Equipment Specifications. The EnDuraLast warranty is for 24 months, with the repair or replacement of the returned unit.

We do not sell any service repair parts for the BMW-STR1; only for VALEO starters made by VALEO. However, if you do require service repair parts, Euro MotoElectrics provides a complete range of original equipment VALEO components to maintain your starter’s brand-new performance. We also carry new BOSCH starter maintenance and repair parts such as brushes, brush springs, bushings, solenoids, drives, field coils and armatures

The following table presents some IMPORTANT starter application information regarding the fitment and function of the starter system:

IMPORTANT: Ensure you are installing the starter with the correct # of gear teeth on the starter drive to match the model year and ring gear installed on the engine. If the incorrect starter is installed it will damage the new starter and / or the ring gear !

For applications 1977-1995 with 9-Tooth Drive Gear Pinion / 111-Tooth Ring Gear, refer to Part # BMW-VAL1 (Valeo) or BMW-STR1 (EnDuraLast)

INSTALLATION INSTRUCTIONS FOR THE ENDURALAST STARTER - BMW R Model 247 / Airhead

Remove the old starter; If it is a Bosch starter you will NOT need the rear support bracket replaced for the EnDuraLast starter. (The Bosch starter weighs 10 pounds and the EnDuraLast starter weighs 6.5 pounds.)
The Bosch starter’s steel drive end bracket is not threaded and requires a bolt and nut combination for mounting.
The EnDuraLast starter’s aluminum drive end bracket is threaded; the original bolts can be used for the EnDuraLast starter mounting, howeverreversing the bolt entry (from the original) is required.
When inserting the starter, do not insert it from the top of the engine, rather slide it in from behind the engine housing.
After carefully tightening the bolts (do not over-tighten, this is aluminum), replacement of the original nuts on the opposite side is optional.

How To Bench Test Your Starter

Starter Motor Removal - Courtesy Brook Reams