KawasakiTrax Community
General Category => The Interceptor Gang => Topic started by: snowcross on February 11, 2018, 08:18:34 PM
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Hi,
just wondering what the proper cylinder compression should be ?.....I used after market pitons with single ring. I'm only getting 116-120 lbs ...
any suggestion would be appreciated.
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I think that compression will vary by the gauge. Our experience with these sleds, and our gauge, has seen compression between 120 and 160. When we have found compression around 120 the sleds are pretty hard to start.
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Has the engine been run enough to seat the rings?
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Do you have a history with the tester? I just have a cheapo tester when I first got it, it seemed to read correctly. After a few years it seems to read about 10psi low.
I say anything over 110 is good. The FSM says the minimum is 90psi...
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your compression sounds fine
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Thank you for the comments ..
now wondering where the problem is .....sadly the carbs (mikuni ) sat for the summer with untreated gas .....in the end the mains (350) were varnished and burned one piston...
when tested the other piston (stock pistons ) read around 130 psi . the burned one around 65psi (snap on gauge)....
The cylinders were honed and new single ring pistons installed (Image Enterprises).... at best now only 116- 120 psi. , starts extremely hard.
Thoughts? pistons or carb settings ? the carb settings worked fine until I burned a pistons so I'm thinking its lack of compression ??
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Compression should go up slightly once the rings seat in. From my experience 115 is plenty, I thing the issue is with the carbs.
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I want to agree but the carb settings worked fine before the mishap.... only thing that has changed is the pistons ...any concerns that the single ring piston can't produce enough compression ? ...my stock piston with 2 rings produced 130 psi. could it be because it has lower compression i need to adjust the carb setting ie pilot main ect. ?
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I have a new but inexpensive tester, but I have 6 sleds and all but one is kawi. they all test 130 to 150.
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I've never used a single ring piston in an invader,any one else?
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I assume he is talking about an Interceptor? I have not tried the single ring pistons, but I know it is common to run the modified single ring jet ski pistons in the 550's.
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yes they are in the interceptor ....the pistons and ring set came from image enterprise ..........I tested my stock interceptor last night 132psi and 130 psi.
I'm staring to believe its the pistons and rings ? Has anyone else had luck with these aftermarkets?
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Stock chrome cylinders? From what I hear the rings Image sells are made for steel sleeves or nicasil ONLY. Trying to run chromed rings in a chromed bore will end in disaster very quickly.
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Stock chrome cylinders? From what I hear the rings Image sells are made for steel sleeves or nicasil ONLY. Trying to run chromed rings in a chromed bore will end in disaster very quickly.
True!!
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well not really getting anywhere with this ...they are stock chrome cylinders..image claims the ring set is compatible ..i think the answer is going back to stock piston and rings ....now to find them ?
anyone have a suggestion? is there another piston and ring set with 2 rings ....any other company?
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I have heard from a good source that the rings that Image sells are chrome. Chrome rings are NOT compatible with chrome bores.
While dual rings are better for our application, the single ring design is proven to work good in the 550. As long as the ring and bore materials are compatible.
In my opinion you have 4 options:
1. find NOS pistons and rings
2. have your cylinders nicasiled
3. have your cylinders steel sleeved
4. Use the other single rings & pistons that are available that do not have chromed rings. (unfortunately these rings will not fit on the pistons Image sells)
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hmm ok thank you gixxer6 .....
question... the chrome cylinders have been lightly honed .(not by me) .thinking they were the same as nicasil ...I'm guessing that is not the case.
Have these cylinders been damaged now?...can I go back to stock pistons and rings ?
I"ve taking my shellacking... now just trying to get things back on track . >:(
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While it’s controversial I’ve had great success lightly honing chrome bores.
You can certainly go back to stock pistons. I sent you a PM about a source for stock style pistons.
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I prefer acid wash but if you can,t feel a ridge should be fine...I,d like that piston info also please
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The local-ish guy that bought these from me went another route. He wants what he has into them (same price that it in the original ad). He might also have NOS rings to go with them at an additional cost, he is going to check. If anyone is interested PM me and I'll send you his phone#.
http://kawasakitrax.com/kawiforum/index.php?topic=1751.msg11250#msg11250
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so would it be correct to say OEM rings would (not) be chrome plated ?
considering the stock cylindersare chrome plated .
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There are cast iron. The rings need to be softer than the cylinder plating. You may have 1 more ring option but I need to do some research before I say for sure.
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so would it be correct to say OEM rings would (not) be chrome plated ?
considering the stock cylindersare chrome plated .
you have to look at the rings, I have a single ring & thats moly & thats OEM cast Pistons
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before i have cylinders nic plated ...would anyone have 1 stock (550) used piston and rings perhaps sitting on there shelf and willing to sell?
any help would be greatly appreciated l
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Do the jet ski pistons have 2 holes near the top of the piston? Just trying to confirm what you have?
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I do have that type from image ...also a set without the holes at the top .... at the moment I'm looking for a stock kawasaki piston with 2 rings
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Kawasaki interceptor stock piston
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sorry they loaded in sideways