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Thread: Pro X

  1. #1
    Join Date
    Jan 2004
    Location
    NJ
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    1,646

    Pro X

    Anyone run a Pro X piston? Did you have good results with it?
    3 CR500R's and counting. Do I really need 4???
    Do I really need 9 Tigers?
    Laegers ATC500R
    DO NOT send any thing to whats his face (dirt-face/crasher) here on the board. What a scum bag. He screwed (stole) money from me and screwed me on my ME360 and Hondaline 300R engine rebuilds.

  2. #2
    Join Date
    Jul 2006
    Location
    United States
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    7,765
    I have a stock compresion pro x in my 86 200sx .70 over, so far its cool,

  3. #3
    Join Date
    Aug 2002
    Location
    New York
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    1,098
    I had a weird experience with them. I cracked 2 pistons in a row. They cracked down the top of the piston. I couldn't believe it. I went back to Wiseco. It's a forged piston, not cast like the stock and Pro-X pistons.

  4. #4
    Join Date
    Jul 2006
    Location
    United States
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    7,765
    whoa! really?! in what? 250r? mines in that little 4 stroker quad

  5. #5
    Howdy's Avatar
    Howdy is offline Putting Priorities in Order, Busier than ever. Catch me if you can
    Join Date
    Sep 2002
    Location
    Celina, Ohio
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    10,079
    I have used them many times in 4 stroke machines ( Honda ) with no problem. The Pro-X rings and Honda rings innerchange with each other, so that is another plus!!
    Never put one in a 2 smoker though.
    Howdy

  6. #6
    Join Date
    Jul 2006
    Location
    United States
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    7,765
    swwweeeeeuuuuuu! got scared for a moment

  7. #7
    Join Date
    Aug 2004
    Location
    Phoenix
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    1,226
    They are good pistons.....Used them many times. Cast pistons set up right last much longer than forged in stock or mildly modified machines. Forged are better suited for higher compression, nitrous, or other extreme motors.
    4 Strokes are NOT the wave of the future!

  8. #8
    Join Date
    Nov 2004
    Location
    Atlanta TX 3-states area
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    1,592
    I have used Pro-X in everything, 4 strokes and 2 strokes. I have one in my 250r right now and so far I havent had any problems. I cracked a Weisco in the same machine however.
    1985 Honda ATC 350X
    2003 Yamaha Banshee
    2003 Polaris Sportsman 500

    There are 3 kinds of people in this world, Those who make things happen, those who watch things happen and those who wonder what the hell happend.

  9. #9
    Join Date
    Jan 2004
    Location
    NJ
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    1,646
    I'm doin the 240 big bore on the 06 Blaster. Rather than go 1 over size from the stock piston I think I'll have more fun with 40 more cc's. I'm not sure if the cast piston is suited for this application. Needless to say I WILL push this machine almost to its limits. Is the cast piston an alloy or steel?
    3 CR500R's and counting. Do I really need 4???
    Do I really need 9 Tigers?
    Laegers ATC500R
    DO NOT send any thing to whats his face (dirt-face/crasher) here on the board. What a scum bag. He screwed (stole) money from me and screwed me on my ME360 and Hondaline 300R engine rebuilds.

  10. #10
    Join Date
    Apr 2005
    Location
    Easton, MO
    --
    142
    I run them in my 85r and have had great experience with them. Being that it's cast you can run a tighter piston to cylinder clearance than the forged Wieseco without the related problem of seizing. I'm running .020 clearance in my R. Try that with a Wiseco and you might as well send me the money you just spent on the top end. Don't believe that a forged product is any better than a cast just because it is forged. I know people that run Pro-X's with UCCR's ranging from 12:1 up to 16:1. Just do your homework and make an educated decision.

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