Triumph TR250 Starter Motors - Early Lucas 25022 and 25079 - 6 Cylinder
TR250s were fitted with Lucas model M35G-1 starter motors. The factory replaced the early design (which had radial brushes contacting a ‘side’ commutator) by an all-variants-encompassing starter motor of the later design (with axial brushes contacting a face commutator). The net result was two starter motors of clearly different construction which were, in fact, interchangeable. They may be identified by the following:
Lucas Type M35G (original Triumph part no. 200535): Stamped with Lucas no. 25022 or 25079, plus suffix between A and H.
Lucas Type M35J: Stamped with Lucas no. 25149.
If you wish to repair your own starter motor, you must identify which type is fitted prior to ordering spares for it.