If you need technical information or help with your BOSCH ignition squarecase Ducati 900SS - Darmah engine - post your FAQs, comments & questions here.
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Desmoconversion of Gts heads. The holes are 10mm in diameter 10mm H7= 10.00-10.018mm. And they are 89mm deep. Predrill with a center drill then a 6 or 8mm drill and then a 9.7mm drill and then use a 10mm H7 reamer. The holes are X=35mm, (both ways) Y=11mm (both ways). Zero is the camcenter with the openrockerholes in line.