Hi, Further to the others, in answer to my question on oil pump failure of 6/8/2019, Bess replied with... "Disconnect the oil pipe connection at the engine, ensure oil flow, reconnect. Fit a tube to the oil tank breather, ensure the oil cap is in place, remove the pressure relief valve complete, blow down the tube to pressurise the oil tank and wait until you see oil dripping out, replace the PRV. Using the kickstart (with plugs removed) to turn the engine over will help. Pour 1/4 pint of oil in the inlet rocker cover to prime the engine. When the engine starts and oil returns to the oil tank place your finger over the discharge in the tank for a short while to force oil to the rockers (you will find any leaks to the rockers as well)". This may help you as it did me, but it is still well worth contacting SRM. All the best.