Apologies for a newbie resurrecting an old thread, but I just purchased a very cherry 1080 CM400T for my girlfriend.
I do not need assistance with installing a tach, already did that. I replaced the old Tach which failed with a used original in great shape i got off eBay, but am afraid I need to replace the tach cable also because the inner cable doesn't spin. I have tried to manually jiggle it, twist it and wiggle the piece that connects to the crank case to no avail. I think it is either broken in the housing or twisted on itself and jammed up in the housing. I purchased a NEW cable (reproduced PN 37260-MC9-860) hat doesn't appear to have a gasket at the crankcase end (see photo). Is there supposed to be a gasket/o-ring between the cable end and crankcase? What keeps oil from spewing out exactly (see attached photo)? It was $15 from a USA seller, figured I'd try it out.
And, does replacing the tach cable in fact require the removal of the right header and right crank case cover, just so I am clear? I am assuming I'll need to drain the engine oil before removing the cover. Are there any other important things to note before jumping into this?
I downloaded the Honda "Shop Manual" for 1979-19814 BC/CM 400's but NOWHERE in this entire manual does it show how to do this or even reference that these bikes have guages! I'm not sure why people say the original manual is the way to go...