Happy Easter to all of you!
So I spent saturday in the workshop and took the A10 that I bought in France to pieces. The headgasket leaked anyway and the noises from the engine were a bit "abnormal". All headbolts were lose, too much valve play as well. As I intended to check the cylinder and bottom end, I removed the primary drive (4-spring clutch) and the timing stuff (SRM oilpump) as well. Cylinder came off and showed a scuffed piston LH, with some remedy marks of a file over the worst places.... Pistons are the cheap asian models at 0,040". As the barrel is not ruined much, I might get away with a hone if someone lets me know the exact diameter of a 0,040" oversize piston and the desired maximum clearance. I don´t want to go to 0,060" straight away as this is a thick flange cylinder. Speaking of thick - the big ends are thick as well and of course the RH mainshaft bush (replaced on the bill that I got with the bike) has about 0,4mm play. The result was a slightly ruined LH conrod, having play on the big end and turned the bronce bush in the upper end -thereby reducing the lube for piston pin to zero. Have not split the cases yet but will do in the next few days, looking forward to repair all this mess and have a nice engine to put back into the frame. Frame and engine plates are powdercoated so I have a lot less parts to spray-paint. Might replace both chromed mudguards (if you know a good source where to get proper parts?)
The non-working dynamo will be looked at or replaced by the Alton system - not decided yet.
Might take some pics tomorrow and post them here.
cheers, Harty