Setting of ignition timing - krausser 4V

[tibbet]

Hi

Have a -77 R100RS with krausser 4V heads and electronic Boyer Bransden ignition and Dyna high power coils.

Any tips on timing?
As it's 8 years since I last runned the bike I think it was 2 degrees before TDP at idle appr. 900 rpm. Can this be correct?

 

[tibbet]

Opps
Should have read the manual, http://www.boyerbransden.com/pdf/KIT00086__BOX00037_.pdf
pkt. 26
Position "F" at 4000 rpm with strobe lamp.
Note: for my krausser engine the case with dual plug. ( 5-6 degress retarded ) as my single spark plug are in the middle of the 4 valves.