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The GS ignitor diy

blowerbike said:
make a positive stop from an old plug and check if the factory TDC is correct.
they normally are not.
Click to expand...
Useful info, thanks.
Ha; used to do that with my old MZ - made a plug with sliding pin to time the thing accurately - 2mm piston rise BTDC iirc.
 
I went down and spun it over again a couple of hours later; fired up immediately on all four, but there's a large exhaust blow from No1, as I knew from before it was put aside, which still makes it sound awful. However, this time it revved freely, but after a minute the smoke being generated from the oil introduced into the cylinders as part of the recommissioning became overwhelming and I had to vacate the workshop. Still, it's nice to know the ignitor appears to work properly and so far there's no nasty bangs or rattles.
 
That's great thought Dave, the DIY ignitor working is the most important thing I would imagine... the rest you know can be sorted :)
 
Well, to wrap up the ignitor thread - barring a new crankshaft in place, it's as far as I can go for now. The ignitor works - the spark is strong and doesn't drift or do anything unexpected, it remains exactly where the mechanical advance unit puts it.
The engine starts first touch of the button, with ropey old coils and 20 year old plugs (that haven't really done many miles, in fact).
If the ignitor on the other bike packs in, I'll fit this one for a longer-term test.
 
That's a good conclusion! Once you get it on the road you'll have to give an update...
 
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