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Thread: Stock bore High compression piston guys how do you like them?

  1. 12-27-2004, 10:11 PM #1
    ranger400ex1994
    ranger400ex1994 is offline Senior Member
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    Stock bore High compression piston guys how do you like them?

    i had a 406 motor with a stage 2 hot cam but i sold it to a buddy for a pretty penny with his stock motor also. now i am either thinking of going with a stock bore wiseco 11:1 compression piston with a stage 2 hot cam. or go with a 416 with either 10:8.1 or 11.1 compression piston and stage 2 hot cam. my 406 was only 10:6.1. i really want to build the motor as cheap as i can but i am willing to spend some extra money. but i don't see how there would really be that much or a power difference between a stock bore 11:1 or a 416 bore 11:1 with the same cam. I mean i have seen stock bore 400ex with 13:1 compression and a good cam take some poorly built 440's. But for another reason i want to build it cheap is becasue i plan on saving for a duncan or CT 440 kit
    2005 450r
    AC bumper, pro taper atv mid bend bars pro armor nerfs G froce axle HMF slip on
    Wifes 2002 400ex
    11:1 wiseco old stage 2 hot cam, works triple rates with rezzies in front.
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  2. 12-28-2004, 06:59 PM #2
    da400hon
    da400hon is offline Junior Member
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    I've got an '03 400ex with stock bore and an 11:1 compression wiseco piston, with a stage 2 hot cam. It has a ton of tork and plenty of power. I've taken 416s and 426s . The high compression piston with the cam is a great inexpensive way to get power out of your ex.
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  3. 12-28-2004, 07:26 PM #3
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    sparks400
    sparks400 is offline Redneck forever (CSA)
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    i like mine not bad at all, i had a megamaxx on there and it felt like it did a lil, then i put a hmf on there and it freakin ripped, so ya do it, plus with the better piston, and compression, u can do more.
    00 400ex, renthal,jadlin nerfs bars, outerwares shock covers, dg front bumper scott grips, n-style seat cover with gripper top,20x11x9 rear kenda klaw xcr, 21x7x10 kenda klaw xcf, polished HMF, hi-flo header, k&n, open airbox, outerwares, 175 main, XRP dimond plate airbox, DG Baja full skid, XRP custom dual oil cooler setup, sparks high rev box,wiseco 11:1, hotcam stage 1, sparks advanced timing key,OMF air scoops,tiny tach rpm gauge,works triple rate w/ rezzy:

    (YFZ-450 KILLER) 03 z400, LUKES RACING BIG BORE KIT, all skids, drz base gasket, both Hotcams, fcr 41mm carb, k&n, outerwares, port and polish by former LRD engine specialist, full system HMF, Yoshi 11,000rpm high rev cdi,D.I.D x-ring chain, 41rear 14front sproket combo, rear bead locks, crome front rims, trail tech bars w/ bar clamp, polish throttle cover, polished oil cover, polished brake resivour, polished shifter, shock covers, jet kit, 180 main, duncan racing brake block off, galfer waver rotor, denton,works shocks w/o rezzy,rebuildable steering stabilzer, Holeshotz dynoed @ 50+hp @ the wheels

    02 warrior, fmf pc4 full system, torque stuffer, k&n, outerwares, jet kit, denton rebuildable steering stabilizer

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    i do fabercating pm for prices, and ask what i can do.
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  4. 12-28-2004, 11:30 PM #4
    ranger400ex1994
    ranger400ex1994 is offline Senior Member
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    do you guys run race gas or just top grade pump gas like 93?
    2005 450r
    AC bumper, pro taper atv mid bend bars pro armor nerfs G froce axle HMF slip on
    Wifes 2002 400ex
    11:1 wiseco old stage 2 hot cam, works triple rates with rezzies in front.
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  5. 12-29-2004, 06:26 AM #5
    coyn0839
    coyn0839 is offline Junior Member
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    I use high octane pump gas and haven't had any problems with my ex.
    -2004 400ex
    -Wiseco STD Bore 11:1 Piston
    -White Brothers E Series slip-on
    -Hotcams Stage 2 Cam
    -MSD Ignition Box
    -Renthal 14T Sprocket
    -Airbox removed
    -dynajet kit installed
    -DG nerf bars
    -DG Alloy front bumper
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  6. 12-29-2004, 08:01 PM #6
    da400hon
    da400hon is offline Junior Member
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    I use 93 and 110 octane mixed half and half, but I've used 93 before and it runs fine.
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