K im asking because i cant remember, ill find out soon but if i can find out early it'll save me time later, because i can think of some kind of bodge for it. I bought a gs500 engine on ebay and the ingnition unit had been ripped off in a crash, snapping the bolt in the crank (ill figure out what to do with it when i get round to that, probably some stud removers or just try pliers) but the thing that concerns me most is that theres a hole where i expected a pin to be that locates the ignition unit. I cant remember, does the crankshaft, or the ignition unit, have the locating pin on it?

just thought i'd ask really, cheers, luke 

There is a 3mm pin in the crankshaft to index the rotor.

I had one that the pin wouldn't stay in the crank so I found the right size drill and made the hole deeper,ground off the drill to the right length and Locktighted the drill shank in the whole. Still in there.

It doesnt matter if the pin is fitted in the crank or the advancer so long as it is there, nor does it need to be Loctited, its not going to go anywhere when the advancer is bolted onto the the crank end and the pin is clamped between the two parts. Loctiting the pin into position makes it very difficult to remove should the need arise.

The one I had was crashed on and the and the hole was smeared as the advancer turned on the ground . So there was no choice but to redrill. And as far as Locktighting the pin/drill shank,that was the idea, to keep it in there when the advancer was removed.

Good morning.

I am planning to convert my GS 500 to run on ethanol (Here in Brazil? Yes, we can!) and I want to know the correct position of this 3mm pin in relation to the cylinders TDCs, in order for designing the 36-1 toothed wheel. My EC supplier says this in one of the teeth nmber accepted.
I need to know where to upt the hole in the wheel, for alignit correcly to the sensor I will install.
Thanks.

Yesterday I put off the right cover of the pulse generator. I moved the rotor in order to align it correctly the R.T mark to the groove in the left coil. It meand the right piston is 12 degrees BTDC.
Rotating the photo I got until to let the piston path line (I suppose it coincides the cylinder fin line) in vertical, I draw a line linking the center line of crankshaft to the 3mm pin centerline.
It is not a precise way, but the 135 degree to horizontal (counterclockwise from horizontal) coincided to the pin, as illustrated.
I suppose this is the angle between right cylinder TDC and pin planes.

Where was I with my head?
When the RT| mark is aligned with the similar mark in the left sesor, the right piston is exactly at TDC, not 12 degrees BTDC.

When going to a different fuel situation, I prefer to experiment with a variety of spark lead settings to see what the engine is asking for.