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Timing mark on electronic ignition gs550

  • Thread starter Thread starter Ira
  • Start date Start date
I

Ira

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If this has already been covered, please point me in the right direction.

I have a Boyer Brandsen ignition on my 1980 gs550, as a replacement for the stock electronic ignition which was defective. I installed it about a year ago, but on recent examination, am second guessing the correctness of my installation.

The crux is this- there is no mark on the engine case against which to align the markings on the plate. The BB installation instructions show how to align the rotor for tdc, which I identified to the best of my abilities. However, when using a timing light to check my work and adjust the advance, there isn't a reference mark on the case.

Am i missing something very basic and obvious, or do I need to make my own timing mark? If so, how?
 
tom203 said:
Is the original TDC mark hidden now? should have look something like this I imagine


Click to expand...


My case does not have a mark like that. I consulted the Clymer manual, which states the years 80-on are "not adjustable" and only shows a picture of the older points ignition adjustment.
 
Post a pic of your ignition set-up. The CDI (non-points) ones still have the mark. Perhaps your ignition plate is covereing the mark?
 
Mine looks about like this other pic- can't see why yours would be different. Note just above "T" mark on revolving advance plate, there is scribed mark ( in the shadow) on crankcase. Even with the electronic ignitor,the timing can be slightly adjusted with screw slots- not much though!

 
Take out the top center screw on the ignition plate and line the mark under it to the mark on the engine case.
 
thanks for the help guys. i think i figured it out? it appears the timing mark is the raised casting above the top screw on the plate. i was expecting it to be closer to the advance plate, as in the pictures a few of you have posted. am i correct here?

14192993472_1125976008.jpg
 
to be clear, this is what i'm dealing with. that little molded line at 12 o'clock is the only thing on the case, but it's nothing like the pictures people are posting. it's also not near the advance plate markings.

14012725567_dc166ca257.jpg
 
I would guess you're correct in assuming that cast mark on the rib at 12 O'clock is the mark.
 
First year for electronic ignition- maybe suzuki hadn't gotten their casting updated. Now that you got it apart, scribe some kind of extension to that mark so you can see it and the revolving advance plate when you shoot your timing light thru hole.
 
tom203 said:
First year for electronic ignition- maybe suzuki hadn't gotten their casting updated.
Click to expand...


Oh right! I hadn't thought of that... I'm sure Suzuki wasn't going to NOT use any parts that would fit.

I would guess your VIN is one of the very early numbers.
 
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