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Thread: auto-decompression?

  1. #1
    Join Date
    May 2010
    Location
    sioux city iowa
    Posts
    140

    auto-decompression?

    from what I've read Hotcam, among others don't have the Auto-decompression on there cams.
    What is the benefit to eliminating this? Also is there a dis advantage of not having it?
    new project:
    04 YFZ 450
    ___________
    SOLD.. 02 416
    stage 2 HC
    JE 10.8:1
    Mild Head porting
    FCR 39mm (08'yfz)
    K&N w/ Outerwear
    PRO-X chain
    450r swing arm
    Lonestar Adj. axle
    holeshot MXR6
    ITP T9,T9 BAJA pro rear
    YOSHIMURA/LEXX Mxe system
    LTR450 front shocks
    AC Pro Peg

  2. #2
    Join Date
    Dec 2002
    Location
    Cheddar Country
    Posts
    1,743
    Advantage to not having, one less part to fail. Disadvantage to not having is the starter will work a little harder. I think most, including myself, will tell you that the "disadvantage" is undetectable.
    '00 Honda XR400R - The classic
    '05 Polaris Predator 500 - The 450 killer - FOR SALE
    '04 Honda Recon - The yard machine
    '05 Honda 500 Foreman 4X4 ES - The plow

  3. #3
    Join Date
    Apr 2007
    Location
    Kentucky
    Posts
    543
    Originally posted by TRXRacer1
    Advantage to not having, one less part to fail. Disadvantage to not having is the starter will work a little harder. I think most, including myself, will tell you that the "disadvantage" is undetectable.
    Yeah I didn't really notice a difference in the way it started with the stock cam with the decomp, compared to the hotcams without it. It starts just as fast.

    I bought my Hot Cam stage 1 at my Honda shop and asked them about it and they said it would be absolutely fine running it without the decomp mechanism.
    04' 400EX
    White Bros. E2
    FMF Hi Flo Headers
    DynoJet Kit
    K&N Filter
    Hot Cams Stage1
    EHS Racing Air Box Lid
    DG Fat Series Nerfs
    Pro Armor Swing Arm Skid Plate
    Pro Taper Bars
    Maxxis Razr's on Douglas Wheels
    Pro Armor Foot Peg Maxi-Mizers
    ASV C5 Pro Clutch Lever
    LSR P-Brake block off
    Modified stock carburetor
    Sparks +6 key

  4. #4
    Join Date
    May 2010
    Location
    sioux city iowa
    Posts
    140
    thanks for input.. how bad is the constent ticking noise you get from running a hotcam
    new project:
    04 YFZ 450
    ___________
    SOLD.. 02 416
    stage 2 HC
    JE 10.8:1
    Mild Head porting
    FCR 39mm (08'yfz)
    K&N w/ Outerwear
    PRO-X chain
    450r swing arm
    Lonestar Adj. axle
    holeshot MXR6
    ITP T9,T9 BAJA pro rear
    YOSHIMURA/LEXX Mxe system
    LTR450 front shocks
    AC Pro Peg

  5. #5
    Join Date
    Nov 2008
    Location
    atlanta illinois
    Posts
    367
    i took it off my stock cam, and it starts the same, plus less ticking
    2005 400ex, DMC duel exhaust,
    filter

  6. #6
    Join Date
    Dec 2002
    Location
    Cheddar Country
    Posts
    1,743
    Mine didn't really tick anymore then stock but I do keep a close eye on the valve adjustment.
    '00 Honda XR400R - The classic
    '05 Polaris Predator 500 - The 450 killer - FOR SALE
    '04 Honda Recon - The yard machine
    '05 Honda 500 Foreman 4X4 ES - The plow

  7. #7
    Join Date
    Oct 2009
    Location
    Desoto,MO
    Posts
    30
    I removed the spring and plunger on mine and have not noticed a difference. Starts right up everytime. Jim
    Never get so busy making a living that you forget to make a life.

    2004 Honda 416ex ported head, Uni Filter no lid and cut snorkel, FMF Power Core slip on,grounded welds, Air Scoops, Spal Fan on switch
    Jetting currently 45 pilot 162 main second clip from the bottom

    I tried looking at it from your point of view but I can't seem to get my head that far up my a**

  8. #8
    Join Date
    May 2010
    Location
    sioux city iowa
    Posts
    140
    Originally posted by TRXRacer1
    Mine didn't really tick anymore then stock but I do keep a close eye on the valve adjustment.
    have you had to make valve adjustments offten the times you've checked?
    new project:
    04 YFZ 450
    ___________
    SOLD.. 02 416
    stage 2 HC
    JE 10.8:1
    Mild Head porting
    FCR 39mm (08'yfz)
    K&N w/ Outerwear
    PRO-X chain
    450r swing arm
    Lonestar Adj. axle
    holeshot MXR6
    ITP T9,T9 BAJA pro rear
    YOSHIMURA/LEXX Mxe system
    LTR450 front shocks
    AC Pro Peg

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