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Thread: How many Pistons do I have to ruin

  1. #31
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    9 psi is fine.

    It is likely your new port plugs that are leaking. You said it held 9 psi, but now its leaking again. If it held it held, if it's leaking it's leaking. Be sure your 'hitch pin' or what ever you got going on is not leaking.

  2. #32
    loganm is offline Competing with a gnat in reading comprehension. Current winner: Gnat. Arm chair racerAt the back of the pack
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    Quote Originally Posted by DohcBikes View Post
    9 psi is fine.

    It is likely your new port plugs that are leaking. You said it held 9 psi, but now its leaking again. If it held it held, if it's leaking it's leaking. Be sure your 'hitch pin' or what ever you got going on is not leaking.
    See that's what I thought, I tightened the plug up as much as I can, it's a VERY slow leak now. Working on it.

    Do you think a leak that small would throw the jetting off to the point where I keep overheating it? Needle says 35F on it
    Last edited by loganm; 03-23-2016 at 05:43 PM.

  3. #33
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    You need to measure your bore, or have it measured, as previously suggested.

    Yes an air leak can cause it to run lean enough to seize.

  4. #34
    loganm is offline Competing with a gnat in reading comprehension. Current winner: Gnat. Arm chair racerAt the back of the pack
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    I have feeler gauges I can measure the piston clearance with

  5. #35
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    As John Tice, a professional in this field suggested earlier, you need to have your bore measured with the proper tool; a bore mic or dial bore gauge. If you want pro results you have to use pro methods.
    Last edited by DohcBikes; 03-23-2016 at 09:51 PM. Reason: name correction

  6. #36
    loganm is offline Competing with a gnat in reading comprehension. Current winner: Gnat. Arm chair racerAt the back of the pack
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    I'm still convinced this is a jetting issue. He told me when I brought the first piston back that they usually bore it a few thousandths over on these motors.

    I'm not trying to on your opinion, I'm going to make some phone calls and do a bit of research. I'm going to look into having JSR dyno tune the engine, I'm curious what the power curve looks like, I can't find anything on the web.

  7. #37
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    Someplace in here it‘s said that Wiesco is the problem? What is the Wiesco problem?
    How can the best in the business be the problem? On occasion Wiesco had packaged the wrong set of rings; that’s all I’ve ever seen.


    John Tice
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  8. #38
    loganm is offline Competing with a gnat in reading comprehension. Current winner: Gnat. Arm chair racerAt the back of the pack
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    Quote Originally Posted by John Tice View Post
    Someplace in here it‘s said that Wiesco is the problem? What is the Wiesco problem?
    How can the best in the business be the problem? On occasion Wiesco had packaged the wrong set of rings; that’s all I’ve ever seen.


    John Tice
    503-593-2908 Alternate 541-508-3944
    www.smallenginemachineworks.com & www.nwsleeve.com
    Turning Custom Cylinder Sleeves Since 1971
    http://forums.everything2stroke.com/...d-the-Shop.com
    Local shop that I called said that. Makes me question their experience and abilities. The shop I had do the work has experience with these motors, told me a wealth of info. I don't think wiseco is the problem, I'm still convinced it's a tuning issue. That makes way more sense to me.

    Don't overlook the small things, pay attention to what YOUR machine is doing. You can do a lot of things through the internet but you can't ride a machine through it... Yet.

  9. #39
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    Where in Kansas are you?
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  10. #40
    loganm is offline Competing with a gnat in reading comprehension. Current winner: Gnat. Arm chair racerAt the back of the pack
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    Quote Originally Posted by yaegerb View Post
    Where in Kansas are you?
    Hr west of Manhattan. A bit of a drive from st l MO.

  11. #41
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    I lived in Lawrence and Wichita during my early to mid 20's. What town?
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  12. #42
    loganm is offline Competing with a gnat in reading comprehension. Current winner: Gnat. Arm chair racerAt the back of the pack
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    Abilene-ish

  13. #43
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    Gotya. If you feel like not screwing with it anymore let me know and I can help out with the rebuild. Shipping won't be that bad.
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  14. #44
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    arlaunch is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Also......

    Sometimes i have found, it is just better to walk away.

    At least for awhile.

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  15. #45
    loganm is offline Competing with a gnat in reading comprehension. Current winner: Gnat. Arm chair racerAt the back of the pack
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    Quote Originally Posted by arlaunch View Post
    Also......

    Sometimes i have found, it is just better to walk away.

    At least for awhile.
    well ime... that usually leads to "screw it, I'll sell it for $500 and use the rest of the money I have saved up to buy something "nice."" Then I have another bike with loads of unfixed problems.

    If I buy another bike it'll be something brand new, or a few years old with low hours. Or I'll be prepared to put in $1k+ fixing it.

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