fiedler.casey
Active Member
Hey all,
Just got ahold of a 78 CB750k for $175 (with title). Needless to say, I'm pretty stoked about the price. Cleaned it up, did a shit load of odds and ends work, and then fired her right up, third kick. Rear brake was seized up, got it free and cleaned, lubed. Front brake is shot, master cylinder needs a rebuild and the caliper probably does too (as soon as I get it off).
She's burning oil pretty hard and cylinder 4 isn't firing (or is only firing 1/10 rotations or so). All cylinders have spark. Carbs got a quick cleaning and all float bowls are full of new clean fuel. Compression in #4 is about 95psi.
How else might I determine the cause of cylinder four not firing?
I also am under the sneaking suspicion that it desperately needs a top end rebuild. What parts do I need to order to do the top end on this girl? (gaskets, piston rings, valve guides, anything specific to this model?) I know that some of what I will need will depend on the shape of things when I get it apart.
I've been seeing some stuff about keeping the cam chain tight so it doesn't come off the sprocket in the bottom end... is this necessary with this model of bike when doing a top end?
Any wisdom about this model would be wonderful! I'm in the process of soaking up information about this specific bike.
Also, frame says CB750K, engine says CB750E... are these mismatched?
Thanks all!
Just got ahold of a 78 CB750k for $175 (with title). Needless to say, I'm pretty stoked about the price. Cleaned it up, did a shit load of odds and ends work, and then fired her right up, third kick. Rear brake was seized up, got it free and cleaned, lubed. Front brake is shot, master cylinder needs a rebuild and the caliper probably does too (as soon as I get it off).
She's burning oil pretty hard and cylinder 4 isn't firing (or is only firing 1/10 rotations or so). All cylinders have spark. Carbs got a quick cleaning and all float bowls are full of new clean fuel. Compression in #4 is about 95psi.
How else might I determine the cause of cylinder four not firing?
I also am under the sneaking suspicion that it desperately needs a top end rebuild. What parts do I need to order to do the top end on this girl? (gaskets, piston rings, valve guides, anything specific to this model?) I know that some of what I will need will depend on the shape of things when I get it apart.
I've been seeing some stuff about keeping the cam chain tight so it doesn't come off the sprocket in the bottom end... is this necessary with this model of bike when doing a top end?
Any wisdom about this model would be wonderful! I'm in the process of soaking up information about this specific bike.
Also, frame says CB750K, engine says CB750E... are these mismatched?
Thanks all!