centrifugal-advance-472-041m-1172

Tech.Customer Service VS 201 gi/Zr/fm Motorcycle R50/5, R60/5, R75/5 . \ Munich, Nov 72 4/72 (041 M)e Group: Engine Ref: Automatic ignition timing mechanism (centrifugal advance) Dear Sirs, In order to obtain for all three motorcycle models optimal performance points in the ignition advance, we have installed a new automatic ignition mechanism as follows: R 50/5 upwards of Chassis No. 2 901 787 R 60/5 upwards of Chassis No. 2 932 689 R 75/5 upwards of Chassis No. 2 973 307, Bo•ch No. (identification mark) previous,1utomaticti ming mechanism 023 202 005 newa utomatict iming mech.:rnism new automatic timing mechanismw ith contact breaker plate, complete, 023 202 007 fully suppressed 023 202 008 Part No. Timing Camshaft 12 11 1 351 571 15° JO I 12 11 l J\J bJ9 12° JO 1 12 11 l 154 404 )2° 30 I As a result of this change, the position of the advance point on the flywheel is altered: If the automatic ignition timing mechanism is replaced, either use the same type of mechanism or re-mark the advance point, when adjusting tse dynamic ignition point; the new advance point is located 6 before the original mark (seen in the direction of revolution of the engine); i.e. 12,5 mm on the flywheel in the dire8tion of the TDC-mark. The static ignition timing point (S = 9 BI’DC) remains unaltered. -2- ( lj Kenntnis genommen – Pris connaissance – Noted – Tornado nota – Preso conoscenza Ablage – Archives – File • Archive ( ,I ( L 4/72 (041 M)e – 2 – Shortly after the installation of the new automatic timing mechanism the dw011 ang0e of the contact-breaker was also reduced from 110 to 78; this prevents overheating of the ignition coils of fully suppressed engines when driven extremely hard. Yours very truly, BAYERISCHEM 0T0RENW ERKE < Aktiengesellschaft '- Kundendienst ppa. -~• )