Last time I cleaned my pistons I took the pads out put a 10mm Allen key between the pistons & pumped them out until they held the Allen key. Spayed them with mr sheen a few times & them cleaned them with an old tooth brush. Then wiped them clean with a rag. Not sure if this is the correct way but worked for me.
arrr Mr Sheen 95% silicon hummm slippery ;-)
2007 Yamaha FZ1 Championship winner (2012) (the tank)
2007 Yamaha FZ1 Road bike
2005 KTM 450 EXC (fun bike)
2005 Yamaha R1 Class winner 2014
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