Hallo again. I have Sporty 1220 (883 after BIG BORE lifting). I trying to adjust timing correctly. I have DYNA S ignition with mechanic advancer. Ive tried to adjust it the same like on instructions but my bike is not working correctly after this. Im reading now that 1200 bike has not the same timing as 883. My marks are for 883. I want adjust timing without strobo or timing marks. My question is - how many inches (mm) must I set the igniton before TDC - without touching advancer ?