1 Output Shaft Thu Jul 31, 2014 8:48 pm
Rockman
Life time member
I have an 84 K100RT with 127000km on it. When it first starts up its quite noisy, clattery almost. My first thoughts were the output shaft and I got a 12 rivet one off RickG to fix it. Before I go to the trouble of pulling it apart Im after some comments just in case its something else
OK, the noise is at idle and a bit above when it starts up from cold, but increasing the revs above say 2000+ rpm and it goes away. If I leave it on a fast idle to warm up, the noise can stop suddenly, but comes back if I reduce the idle speed. When its warm it runs smooth and and quiet.
My thoughts are that if it were loose rivets in the output shaft then it should rattle hot or cold.
I did balance the throttle bodies. This made little difference at cold idle, but it does run smoother at higher revs.
It sounds like uneven throttle bodies/fuel injection/ignition or something when cold to me, but Im open to suggestions.
OK, the noise is at idle and a bit above when it starts up from cold, but increasing the revs above say 2000+ rpm and it goes away. If I leave it on a fast idle to warm up, the noise can stop suddenly, but comes back if I reduce the idle speed. When its warm it runs smooth and and quiet.
My thoughts are that if it were loose rivets in the output shaft then it should rattle hot or cold.
I did balance the throttle bodies. This made little difference at cold idle, but it does run smoother at higher revs.
It sounds like uneven throttle bodies/fuel injection/ignition or something when cold to me, but Im open to suggestions.