How many ML of Redex Engine Flush should I use in my motorcycle oil?

I need to flush the oil in my motorcycle - a yamaha xs250 (1982). It is supposed to hold 2.0 litres of oil usually, without changing the oil filter, so how many ml of Engine Flush should I use?How many ML of Redex Engine Flush should I use in my motorcycle oil?about 500ml thats allHow many ML of Redex Engine Flush should I use in my motorcycle oil?http://www.halfords.com/webapp/wcs/store



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