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Piston Hole Kz1000LTD 1982
- cartal
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05 Jan 2023 09:42 #878557
by cartal
Replied by cartal on topic Piston Hole Kz1000LTD 1982
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- hardrockminer
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05 Jan 2023 10:53 #878565
by hardrockminer
I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.
Replied by hardrockminer on topic Piston Hole Kz1000LTD 1982
It sounds like money is not an issue for you. But if you want to spend a little less you can stick with standard bore and replace the blown piston. You can still buy standard pistons from Kawasaki, or from Partzilla for about $80 USD.
www.partzilla.com/catalog/kawasaki/motor...-j2/cylinder-pistons
www.partzilla.com/catalog/kawasaki/motor...-j2/cylinder-pistons
I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.
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- Kelly E
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05 Jan 2023 11:32 #878571
by Kelly E
The Rust Bros. Garage Collection
1974 Honda CB 550 K0
1975 Honda CB 400F Super Sport
1977 Kawasaki KZ 1000 LTD
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda Sabre 700
1984 Honda Interceptor 1000
1990 Moto Guzzi 1000
1994 Kawasaki ZG 1000 Concours
And more
Replied by Kelly E on topic Piston Hole Kz1000LTD 1982
I would go with the minimum overbore to ensure that the cylinders aren't tapered or something considering the lack of maintenance and abuse.
The Rust Bros. Garage Collection
1974 Honda CB 550 K0
1975 Honda CB 400F Super Sport
1977 Kawasaki KZ 1000 LTD
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda Sabre 700
1984 Honda Interceptor 1000
1990 Moto Guzzi 1000
1994 Kawasaki ZG 1000 Concours
And more
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- Nessism
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05 Jan 2023 19:46 - 06 Jan 2023 06:32 #878594
by Nessism
Given a truly scientific approach, each cylinder, valve, valve guide, piston, etc, will be measured, and only those parts that are out of spec to the service limit will be replaced.
Personally, I'd measure the bores for diameter, out of round, and taper, before committing to an overbore. I suspect it needs it, but "to measure, is to KNOW."
Same with the head; measure the valves before randomly replacing them, just because. What's more important, is dressing the seats, and replacing the valve guides if they are sloppy. And if dressing the seats, the valve stems need to be shortened.
Anyway, that's my point of view.
Replied by Nessism on topic Piston Hole Kz1000LTD 1982
It sounds like money is not an issue for you. But if you want to spend a little less you can stick with standard bore and replace the blown piston. You can still buy standard pistons from Kawasaki, or from Partzilla for about $80 USD.
www.partzilla.com/catalog/kawasaki/motor...-j2/cylinder-pistons
Given a truly scientific approach, each cylinder, valve, valve guide, piston, etc, will be measured, and only those parts that are out of spec to the service limit will be replaced.
Personally, I'd measure the bores for diameter, out of round, and taper, before committing to an overbore. I suspect it needs it, but "to measure, is to KNOW."
Same with the head; measure the valves before randomly replacing them, just because. What's more important, is dressing the seats, and replacing the valve guides if they are sloppy. And if dressing the seats, the valve stems need to be shortened.
Anyway, that's my point of view.
Last edit: 06 Jan 2023 06:32 by Nessism.
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- hardrockminer
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06 Jan 2023 04:26 #878597
by hardrockminer
I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.
Replied by hardrockminer on topic Piston Hole Kz1000LTD 1982
That's what I do. All the specs are in the service manual. One just needs the correct tools.
I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.
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- Wookie58
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06 Jan 2023 06:18 - 06 Jan 2023 06:22 #878598
by Wookie58
Replied by Wookie58 on topic Piston Hole Kz1000LTD 1982
I absolutely agree and am not inclined to spend for fun on parts that are still serviceable. When it comes to valves I have only ever had to replace badly burnt or bent units as generally wear occurs in the guide rather than the valve. However given that Carlos bought the bike "as is" and the only thing he knows of it's past is that it has "had a life" when it comes to the pistons (only my personal opinion) without a definitive "root cause" of the failure I would air on the side of caution and go the rebore/replace route. You could magna-flux or X-Ray etc the existing pistons to ensure they aren't also weakened by what ever caused the #2 failure but weighing the cost of testing against "peace of mind" of new parts I know which way I would go (IMHO) Let's not forget measuring bores takes a bit of practice to complete accurately and the equipment "ain't cheap"
Last edit: 06 Jan 2023 06:22 by Wookie58.
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- cartal
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06 Jan 2023 07:18 #878599
by cartal
Replied by cartal on topic Piston Hole Kz1000LTD 1982
I wish money was not an issue for me. The reality is I expected this resto project to be a quick face wash issue; but it has become more complicated with the broken piston (and now the rotor too).
Once into this, I would definitely like to leave the bike as good as possible. I know nothing about the past of the bike, but I do know it was really abused and had no maintenance.
I will throw in some new pistons and skim the head. Some pistons are severely discoloured and I am afraid they may be weakened. I’ll definitely have valves looked at. If I can avoid changing them, much better.
I’ve spent the last 6 hours searching for an alternative to the original rotor, which is more than 500 dollars at Cmsnl. Found an alternative on 195. Will keep looking for the best at the lowest price.
in many things I’ll be out of depth here. That’s why I ask questions. I will ask the shop too, who’s very knowledgeable what is the best course of action. I love this bikes, and enjoy working on them.
But I don’t want to do it twice.
Once into this, I would definitely like to leave the bike as good as possible. I know nothing about the past of the bike, but I do know it was really abused and had no maintenance.
I will throw in some new pistons and skim the head. Some pistons are severely discoloured and I am afraid they may be weakened. I’ll definitely have valves looked at. If I can avoid changing them, much better.
I’ve spent the last 6 hours searching for an alternative to the original rotor, which is more than 500 dollars at Cmsnl. Found an alternative on 195. Will keep looking for the best at the lowest price.
in many things I’ll be out of depth here. That’s why I ask questions. I will ask the shop too, who’s very knowledgeable what is the best course of action. I love this bikes, and enjoy working on them.
But I don’t want to do it twice.
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- Jonas_Z1000j
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06 Jan 2023 07:25 #878600
by Jonas_Z1000j
Z1000 J2 -82 not so running restoration object anymore
Z900RS -21 Green/Yellow
Replied by Jonas_Z1000j on topic Piston Hole Kz1000LTD 1982
I am just finishing up similar work as you are planning on the engine and bought the IMD pistons 0,5 oversize. As you said, they have very good reviews.The machine shop checked them when boring the cylinder and their general comment was that pistons like that is either good or great today.
Have you measured the cam chain and the guides wear? The reason I splitted my engine was that it had cam chain rattle noise (probably). It turned out that all the individual parts was within its service limits, but the tensioner was out of its limit (3 mm instead of 5.2 which is the minimum limit on the wedge protrusion).
Have you measured the cam chain and the guides wear? The reason I splitted my engine was that it had cam chain rattle noise (probably). It turned out that all the individual parts was within its service limits, but the tensioner was out of its limit (3 mm instead of 5.2 which is the minimum limit on the wedge protrusion).
Z1000 J2 -82 not so running restoration object anymore
Z900RS -21 Green/Yellow
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- cartal
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06 Jan 2023 08:42 #878605
by cartal
Replied by cartal on topic Piston Hole Kz1000LTD 1982
Jonás, I will very probably end up splitting the cases, as there is too much wrong in this engine to take anything for granted. I will look at the chain, and measure as much as I can to be on the safer side.
Regarding the pistons, when you went +0,50, did you shim (and how much) the head to compensate for the lost compression ratio, or do the pistons have a higher “head” to compensate for that?
Regarding the pistons, when you went +0,50, did you shim (and how much) the head to compensate for the lost compression ratio, or do the pistons have a higher “head” to compensate for that?
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- zed1015
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06 Jan 2023 09:13 #878610
by zed1015
Stock spec pistons will retain the correct compression ratio..
AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
kzrider.com/forum/23-for-sale/611992-air-corrector-jets-
Replied by zed1015 on topic Piston Hole Kz1000LTD 1982
The piston crowns account for the overbore.
Regarding the pistons, when you went +0,50, did you shim (and how much) the head to compensate for the lost compression ratio, or do the pistons have a higher “head” to compensate for that?
Stock spec pistons will retain the correct compression ratio..
AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
kzrider.com/forum/23-for-sale/611992-air-corrector-jets-
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- cartal
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06 Jan 2023 10:29 #878613
by cartal
Replied by cartal on topic Piston Hole Kz1000LTD 1982
Cool…
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- Mikaw
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06 Jan 2023 18:14 #878631
by Mikaw
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
Replied by Mikaw on topic Piston Hole Kz1000LTD 1982
Contact Thomas. He is an IMD rep.
here’s his Facebook. www.facebook.com/profile.php?id=100002915797424
here’s his Facebook. www.facebook.com/profile.php?id=100002915797424
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
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