Information on the oil system and some small items which cause problems and are relatively simple to repair.
On all models obtaining and recording the firmware version of the BMSC/BMSE is important and can save time fault finding. A GS911 is a handy tool.
2005 Model. Poor starting (when engine is cold); engine shuts off; poor engine response when clutch is engaged after selecting a gear. Update to later firmware.
The system is a dry sump system with a pressure pump and a scavenging pump. It has a low volume of oil. Oil pressure is 0.5 bar at idle.
The basic system diagram here shows fluid paths and components.
Oil pressure sender information is covered in Engine Sensors.
The external lines to the oil tank are both low pressure
Run the machine to 10 to 20 kms, park and let oil settle for 5 mins.
With the machine upright, check oil is at line on sight glass.
Oil lamp on dimly at idle - Grit in the sender - clean it
Oil Leaks near sender - Some senders were prone to leaks - replace it.
The engine breather into the air box will produce some oil condensation and hence the drain fitted by BMW.
This would normally only be a very small amount of oil. A larger build up of oil indicates a fault.
A Rotax engineer has indicated there are three fault conditions which can cause a build up.1/ Oil over fill, which is a common problem with new owners of bikes with dry sump systems.
Behind the oil filter are two screws which gain access to the non return valves for the oil cooling system. They can be very difficult to remove.
A pdf with all the known information and oil non return part numbers Non Return Valve Info
The throttle body manifold can perish and crack around the base causing rough running and poor idle. The symptoms are often thought to be a sensor or engine ECU fault but there are no fault codes showing. Check it when doing routine maintenance.
Part numbers for the throttle body and components are in this Fuel Delivery pdf
The cam chain tensioner on the early F Series can stick and not provide full tension on the cam
chain. An updated cam chain tensioner is available to resolve the problem. P/N - 11317710986
On the 00-04 single spark, the spark plug cap connections can become corroded and
the metal shroud can leak HT to earth. The components in the cap can be unscrewed and cleaned. The shroud can also be removed permanently.
One fault symptom can be hesitation in wet weather.
Tyga-performance - NSR150SP, Motionpro - 08-0385
The OEM lower bolts are specified as Oval Head Screw - M8x25-10.9 ZNS3 - P/No 36 31 7 709 543