Topic: Dyna S timing issue...

[heffay]

allright... what do you guys think of this?

how does the timing set up on the dyna s get about 5-10 degrees out of whack so that i will have to drill new rotor screw holes just to the right of the precut screw slits.  it is basically right next to the precut ones, basically, a bolt's worth of "offness".

actuator pin is in the proper hole, everything seems to be working properly, static timing w/ a 12 v test light and it is just a bit off.

anyone ever have this problem?  should i just get out the drill?  i never have really been able to time the bike perfectly w/ points... i wonder if it is the same issue that is just more noticeable w/ a dyna.

thanks for any insights you can offer. 
heff

[scondon]

   Heffay, are you static timing to the advance marks?  I haven't figured a way to hold the advancer open in order to static time a Dyna S so I always use a timing light. With the Dyna set to the advance marks I usually end up a few degrees advanced at "F" which is no big deal.

  The 1&4 and 2&3 pickups have some adjustment room in them, but not much. Is it possible to move them to get the adjustment you need?

   A clockwise spin of the plate retards the timing, counter-clockwise advances it. Which direction are you running out of room?

  Are you installing this ignition for the first time, or is this a developing problem on a old ignition?Something is amiss if you're considering drilling the plate. Either timing method, sticky advancer unit, or defective ignition. Hopefully something simple

EDIT: Just realized that you're probably fitting this to your cb400. I'm not familiar with the Dyna S that fits your bike(DYDS1-1) but I assume it's the same animal as the one for cb500-550-750(DYDS1-2)

[neil young]

i had the same problem.i loosened the allan keys on the pickups and rotated them untill my advance lined up then retightened the allans.i used a timing gun

[eurban]

On my older Dyna III ignition the slots for the three plate mounting screws were not cut correctly.  When one was hitting on the clockwise side of the slot, another was close to touching on the counterclockwise side.  This gave me very little rotation  for timing adjustments.  The solution was to elongate the offending slot using a chainsaw blade file.  Not sure if this helps in your case or not but the quality control on this particular aspect of my Dyna III was not too good.  Get it close statically then adjust with a strobe at the full advance mark.  Check both the 1-4 and the 2-3 pairs.  The Dyna has its grounding surface on the back of the plate so if you loosen up the screws too much during the timing adjustments your engine might die (till you snug up the screws)  I got my current 750 as a castoff from a exhasperated buddy who couldn't figure out why out of the blue his engine would die, only to restart once it sat for a bit.  After a bit of head scratching I discovered the loose timing plates screws and all was well again! . . . .

[heffay]

thanks for the replies guys... scondon you were the closest to my actual problem.

i seem to have glazed over the part in the instructions to hold the rotor/actuators open.

because i was timing to full advance w/out opening the actuators i was throwing it out of time by about a multiple of two 

i suck, i know.

thanks for all the ideas... had there been a "real" problem maybe some of it might have helped.