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Thread: Wiseco 12:1 on 350X

  1. #1
    Join Date
    Oct 2003
    --
    19

    Wiseco 12:1 on 350X

    I recently picked up a 12:1 piston for my 350X which is stock besides a K&N,removed ex. baffle, 20 in. Holeshots, and a 14T front to make up for the smaller tires. Was wondering if anyone has any experience with this piston. Can I get by on 93 octane or 50/50. What should I expect as far as a seat in the pants difference regarding power/quickness. Hopefully it would be noticeable since stock is 8.5:1. I also have a 400EX carb to try out as well but I need some more jets to play around with. Any input is appreciated...

  2. #2
    Join Date
    Jan 2003
    Location
    Cincinnati, OH
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    3,289
    this is were im going to ask if you went with a better rod?

  3. #3
    Join Date
    May 2003
    Location
    Shediac, New Brunswick
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    1,126
    Quote Originally Posted by Xowner
    this is were im going to ask if you went with a better rod?
    I have heard the rod is weak ?? ... I am going to make a new topic about all the weak spots on a 350x
    '04 450r, hr +3 stroker, s2 hotcam
    '84 Honda 200x
    slow restro


    Previous rides 82 Yamaha yt175, 85 Yamaha 225DR, 84 Honda 200M, Ski-doo Olympic 340

  4. #4
    Join Date
    Oct 2003
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    19
    Nope, like I said it is stock.

  5. #5
    Join Date
    May 2003
    Location
    Shediac, New Brunswick
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    1,126
    you might want to think about changing your rod, and maybe replacing crank bearings before you install that, just for good measure. Also read this post http://www.3wheelerworldforums.com/viewtopic.php?t=21149
    '04 450r, hr +3 stroker, s2 hotcam
    '84 Honda 200x
    slow restro


    Previous rides 82 Yamaha yt175, 85 Yamaha 225DR, 84 Honda 200M, Ski-doo Olympic 340

  6. #6
    bbechtel16 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Oct 2002
    Location
    Halifax, PA
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    400
    Yeah, and I'm pretty sure you need to run 93 AT A BARE MINUMUM at that compression ratio! Maybe even race fuel or octane boost.
    -'86 ATC 250SX: No longer mine... Complete 350X front end, Corbra Megaphone system, 350X carb with UNI dual stage foam & outerwear bolted driectly up, Powroll/Rocky 260cc bore 10.5 to 1 compression piston.

  7. #7
    Join Date
    Jan 2003
    Location
    Cincinnati, OH
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    3,289
    your stock rod WILL NOT hold up

  8. #8
    Join Date
    Oct 2003
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    19
    Who makes a good aftermarket rod for the 350? I may just go with a 10.25:1 and run Premium and be done with it. I dont what to knock the reliability of this bike.

  9. #9
    Join Date
    May 2003
    Location
    Shediac, New Brunswick
    --
    1,126
    so you want to sell that piston now?? if so PM me.
    '04 450r, hr +3 stroker, s2 hotcam
    '84 Honda 200x
    slow restro


    Previous rides 82 Yamaha yt175, 85 Yamaha 225DR, 84 Honda 200M, Ski-doo Olympic 340

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