rodger1331 Posted March 18 Report Posted March 18 Does anyone have any information on the pistons, rings and barrels fitted to the Grob 109B. We are in the middle of replacing the cylinder heads due to a burnt valve and if we could get hold of some new rings we would like to replace thoses as well. The barrels have and internal diameter of 100mm and the pistons are 100mm, I believe the rings etc are made by MAHLE and thats all I know. The Grob parts manual lists the 2 top rings part no 2521722 and 1 bottom ring as 2521706 but those references look to be unique to Grob and are not a MAHLE part no. If anyone can shed any light on the rings it would be very much appreciated, Im relctant to remove a barrel and rings as if i break one without knowing the replacement we would be grounded. Quote
philphil_99 Posted 7 hours ago Report Posted 7 hours ago I purchased some rings from Grob directly a while back. They had a full set in stock. Quote
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