1981 Kawasaki KZ750 Resurrection

[rustybronco]

Hey Dale,

I'm thinking 320 since don't need a rough texture to seat the rings per say.

Next question is whether the rings should be removed from the pistons? Seems like it takes quite a bit of flexing to remove rings so worried they may get damaged. Not worried about carbon in the ring lands, engine only has 10k miles on it.

If it were me doing the work and the piston can be easily removed from the connecting rods, I would remove the piston and ring assemblies in order to remove the carbon/varnish above the 1st ring land by using a combination of spray or dip type cleaner to remove the varnish, and a rotating wire brush to remove the carbon from the tops of the pistons. leave the rings in place if you think it best not to disturb them. Just scrub them well with hot soapy water after you're finished

I'm just not happy with the way upwards of the ring lands look.

[Nessism]

Deglaze the cylinders and reuse the old rings. Choice of stone will depend on the rings material. (240 to 320 if I read correctly)

Hey Dale,

I'm thinking 320 since don't need a rough texture to seat the rings per say.

Next question is whether the rings should be removed from the pistons? Seems like it takes quite a bit of flexing to remove rings so worried they may get damaged. Not worried about carbon in the ring lands, engine only has 10k miles on it.

[rustybronco]

Deglaze the cylinders and reuse the old rings. Choice of stone will depend on the rings material. (240 to 320 if I read correctly)

[Nessism]

Pistons look good, but cylinders look a little funny. Going to borrow a bore gauge from work and measure them. There couldn't have been much blow by based on the pistons so leaning toward a light hone and reusing the rings. Stink'n rings are $45/hole (cheapest I've found). Would love to replace them but not at that cost unless it's absolutely necessary.

P1010332 by nessism, on Flickr

P1010335 by nessism, on Flickr

Yes. As it has now been disturbed and it may be out of round as well. Use a Precision hone not a ball one. You are doing a very light hone. Unless it is out of round, so go gently. Use the old rings unless there is oil burnt on the pistons.
Laters
G

[Nessism]

Don't forget to lightly hone the cylinders before assembly.
G

Hone even if reusing the rings? Rings should already be seated right? Maybe I'll start a new thread in the Engine forum for more feedback...

Don't forget to lightly hone the cylinders before assembly.
G

[rustybronco]

Found a reasonably priced powder coater a couple years ago, but leaning toward painting myself. Guess I should call this guy and get a firm quote. I have a blast cabinet, but doing the frame is the challenge.

I know you have already thought about it, but in your situation, you may be better off shooting the small parts yourself and let the powdercoater handle the frame.

[Nessism]

Great work Ed, I have an 81 Gpz 550 that I parted out a few months back. Not sure what swaps but if you are in need of anything let me know.

Hey Joe, I want to swap over to the black rectangular Gpz turn signals. If you have a clean set please let me know.

Great work Ed, I have an 81 Gpz 550 that I parted out a few months back. Not sure what swaps but if you are in need of anything let me know.

[Nessism]

Great progress, man. Feels good to get yer hands dirty again, eh..? That's a pile of powder coating to be done. Nice to see the inside of the engine is so clean. I'll bet it fires right up.

Found a reasonably priced powder coater a couple years ago, but leaning toward painting myself. Guess I should call this guy and get a firm quote. I have a blast cabinet, but doing the frame is the challenge.

[nvr2old]

Great progress, man. Feels good to get yer hands dirty again, eh..? That's a pile of powder coating to be done. Nice to see the inside of the engine is so clean. I'll bet it fires right up.

[blowerbike]

hey,
my farm animal uses a worM gear also but guess what????
the damn thing adjust backwards...holy confusion????????
damn polish motorcycle's...kawalski's.....

[blowerbike]

WORM F IN GEAR BAY BAY!!!!!!!!
hahahahhaha

[Nessism]

F ing wow!!!!

Best of all...clutch actuator uses a WORM GEAR!