In terms of the correct amount of oil, The Ryker 900, for example, requires 2.8 litres of oil, including the filter. However, instead of pouring it all in at once, you’re best off filling most of it at first, measuring the oil level, and add in what’s required to be in the middle of the minimum and maximum range of the oil dipstick. The range on a dipstick between minimum and maximum amount is approximately 400mm of oil.