When doing an oil change does anyone use oil flush? (the stuff you put in cars to clean the s**t out) or it is not advisable to use this on bike engines?
My mate used parafin to flush his engine, didnt run the engine to do it tho. It was after he stacked it and one of the cases split right open. He was worried grit might have got in so just poured parafin in through oil cap and let it run out with the case removed. Hasnt done his engine any harm it seems.