Quote:
Originally Posted by NZHP2
I'm jumping onto this thread 7 years after the last post - is there anyone still here?
I have just purchase the big bore BMW R1200 GS/S/ST/RT/R 2006 - 2009 103mm Bore Wossner Racing Piston Set (x2) for my R1200S.
Can I ask - Can i run the standard conrods with these pistons or do I need to purchase race conrods?
I notice some people are buying 128mm conrods to replace their 125mm rods - what am I missing here, surely something else would need to change to accommodate for the extra length......
Thanks in advance.
Scott
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Hi Scott, you can run the stock rods as long as the wrist pin holes are in the same location relative to the piston deck (top). Wossner had made a high performance “kit” that utilized 3mm longer rods (128mm c-c) to slow down piston speed, and reduce forces towards the cylinder walls. If you have the pistons with the relocated wrist pins you will need the longer rods.
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