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Flywheel fit and electrics


TMofCumbria
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I bought a 199A. It would not start when I went to collect it but owner said he had had it started to check it was OK that morning. No spark, but when we removed the plug but it did look as if it had run. Got it home cleaned the points and checked gap whch as correct. There was now a spark but may be not as bright or as consistent as it should be. Still no start although I think it fired a few times. Tested the HT coil and secondary winding was open circuit so bought new coil from Inmotion. Slightly better spark but still no start. Had the condenser checked by an electrician. No Mf capacitance so ordered one from Inmotion which has just arrived.

When removing the flywheel the nut was not very tight, only 30 to 40 ft lbs, it should be 75 ft lbs. However the flywheel was very difficult to pull off, I had to use an impact wrench on the puller bolt. When I got it off I found there were slivers of metal on the tapers and dents and areas galled out. The key and keyway are in good condition. Because of the lumps and dents the flywheel would not go back on properly, and could be rocked about. I removed most of the high spots with a die grinder and am now lapping the flywheel onto the taper, just about got it satisfactory. When the flywheel is fully seated how far should the threads on the crankshaft stick out beyond the flywheel?

Obviously the flywheel not being seated as far back as it should be and possibly not concentric on the crankshaft, will have reduced the magnetic flux in the source coil so I am hoping properly seating flywheel along with new capacitor fixes the problem. Does anyone know what the resistance of the source coil should be and who can rewind them? (please dont suggest electronic ignition, I am wanting just to get the bike running and everything else checked before I spend a lot)

The timing was 2.9 mm BTDC. However to achieve this the stator plate was in the fully retarded position, which seems unusal. I have had bultacos many years ago and think the stator was usually near middle position. Unfortunately I did not clock the flywheel before removing it and it may have been running out of round due to the shards of metal in the taper. If this was the case it would affect the timing. Where would anyone expect the stator position to be?

Thanks

Tony

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