Join Date: Dec 2008
Location: Port Macquarie, NSW, Australia
Donít think water is the issue as any small amounts of moisture that get past the slightly opened fuel cap would be caught in the outer ring of the fuel inlet area and drained away. First thing I would do is a TPS reset and see if that helps, otherwise I think you have an air leak at or below the throttle bodies and two of the common causes are the crankcase breather hose assembly and the inlet manifold stub O-rings. If you have a build up of oil/road grime on top of your motor this is a good indication the breather hose has cracked. 18 years is a pretty good run out of the hose if itís still original. Another possible culprit is the coolant temperature sensor (not the gauge) that is situated behind the inlet cam on the back of the motor. When an air leak is present the fuel mixture is too lean at idle, particularly when the engine is cold. At higher revs and with more air being drawn into the cylinders this is not so noticeable. Nor are the symptoms as bad in warm or hot weather. Having suffered these symptoms in the past I have found you can give a little throttle while starting and/or rough idling and get the motor to run. Once the motor is hot, starting is not an issue (for me) In my case, having already replaced the breather hose, the fault was traced to the O-rings under the throttle body stubs.
2002 K1200RS Owned from new. Pacific Blue, Ohlins. 183,000kmís
2016 K1300R Black, Remus hexacone. 6000kmís
The family history
1951 AJS 500 single - my Dads
1916 Triumph Type H, Western front, France WW1 - my Grandads