Calling on the collective knowledge of this group again… ( bike is a 2012 1200 Sport 8v)
So following a successful change of faulty oil pressure switch, I found I had an oil leak. Ran the bike for about 15kms to check the pressure switch and found the left side of the engine dripping in oil. Traced it to the Rotational Phase Sensor where I could see it bubbling out on tick over. Ordered a new gasket but on fitting found there was also an ‘o’ ring around the top of the sensor body. So replaced that also from my stock (the replacement was a slightly fatter one). Put it all back together and now find that the motor won’t run on tick over; it’s OK with the throttle open, but stalls at tick
So, is there something critical in the installation of this sensor (it’s purpose is something I don’t understand) or do I have yet another issue to deal with?
BTW, I live in France so taking it to one of the clubs favourite specialists is not an option right now.
If it’s anything like the older phase sensor there will be shims under it to correct the air gap between it and the phonic wheel, sounds like the air gap is too big or the sensor is defective
Thanks Phil, confirms my fears. The spare ‘o’ ring being much fatter than the original is what’s giving grief I think. Put the old one back and the motor runs much better (but the leak is back).
Rgds, Rich
In the manual I am pretty sure that it states the air gap between the phase sensor and the gear wheel that it takes its timings from. so by putting a larger O ring on it makes the gap bigger and the magnetic field is weaker [someone correct me if I am wrong]
Replaced the one on my 09 Stelvio a while back, no O-Ring, just the Shims, no leaking.
A smear of any good quality proprietary Sealant will do, Hylomar, Hermetite, etc.
Just to wrap this one up, I sourced a OEM ‘o’ ring, fitted and seems to have cured the leak. Still needs a decent road run to be sure - just waiting for a nice day, thank all…