1 K100 injector coil resistance? Thu Apr 23, 2009 2:49 am
BBP
New member
Hi All,
a question for those knowledgeable people here. I am in the process of going over the old K as it is not running very smooth, and needs some tlc anyway. I thought I might get the injectors cleaned and tested. As mentioned in other posts and on other sites the injector coil resistance is expected to be 14.5 ohms. I checked all mine and they are 17.5. Makes me wonder if I have the right injectors, maybe the previous owner changed then at some stage. It is an ex police LT circa 1991, so one of the last K100s I guess.
Would being out 3 ohms make a big difference in the operation of the engine. I wonder if this is why I always thought it was very rich at idle but become better at higher revs. I had a CO analyser up it once and that seemed to confirm it was rich at idle then leaned out a lot at high revs. I was told that was probably not normal but the guy did not know why(was not a bike shop btw, not really anyone here in Canberra that know the old Ks well).
I have also noticed it is a bit noisy in the tappets so I am guessing i'll need to get that sorted out as well. Would having valve clearances out cause it to idle rough and "hunt" around a bit. I can never seem to be able to get it to stay balanced with vacuum gauges.
One other question someone may know the answer to, with the fuel pressure regulator. Once the fuel rail is at pressure, 36psi I recall, how long does it retain that pressure once the engine has stopped. The Clymer manual states to relieve this pressure before undoing fuel lines. But mine has always had zero pressure even 60secs after stopping engine. Is there a way to test the pressure regulator?.
Regards
Robin
Canberra, Australia.
a question for those knowledgeable people here. I am in the process of going over the old K as it is not running very smooth, and needs some tlc anyway. I thought I might get the injectors cleaned and tested. As mentioned in other posts and on other sites the injector coil resistance is expected to be 14.5 ohms. I checked all mine and they are 17.5. Makes me wonder if I have the right injectors, maybe the previous owner changed then at some stage. It is an ex police LT circa 1991, so one of the last K100s I guess.
Would being out 3 ohms make a big difference in the operation of the engine. I wonder if this is why I always thought it was very rich at idle but become better at higher revs. I had a CO analyser up it once and that seemed to confirm it was rich at idle then leaned out a lot at high revs. I was told that was probably not normal but the guy did not know why(was not a bike shop btw, not really anyone here in Canberra that know the old Ks well).
I have also noticed it is a bit noisy in the tappets so I am guessing i'll need to get that sorted out as well. Would having valve clearances out cause it to idle rough and "hunt" around a bit. I can never seem to be able to get it to stay balanced with vacuum gauges.
One other question someone may know the answer to, with the fuel pressure regulator. Once the fuel rail is at pressure, 36psi I recall, how long does it retain that pressure once the engine has stopped. The Clymer manual states to relieve this pressure before undoing fuel lines. But mine has always had zero pressure even 60secs after stopping engine. Is there a way to test the pressure regulator?.
Regards
Robin
Canberra, Australia.