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xj 750 compression

Discussion in 'Hangout Lounge' started by dcesa1, Apr 14, 2013.

  1. dcesa1

    dcesa1 Member

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    I was wondering what the compression range should be for my bike. It says the bike has 8700 miles on it but it appears the odometer has been tampered with (the glass is chipped around the edges like someone was trying to adjust it even though it comes apart from the back!) I was also wondering what the 9.2 to 1 compression ratio is referencing for the 1?
     
    dcesa1, Apr 14, 2013
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  2. biggyfaction

    biggyfaction Member

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    its ait to fuel ratio. and it should be around 140-150. mines around 127 right now :( but its going up slowly:)
     
    biggyfaction, Apr 14, 2013
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  3. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    No, that's the compression ratio of the cylinders; the mathematic representation of the difference between the volumes when the piston is at BDC and the cylinder is at full capacity and when the piston is at full compression, its smallest capacity.

    The SPEC for your motor is 128psi minimum, 156psi "standard" and 171psi maximum.
     
    bigfitz52, Apr 14, 2013
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  4. 750E-II_29Rbloke

    750E-II_29Rbloke Active Member

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    Fitz explained the comp. ratio nicely, and the air/fuel ratio you're thinking of (stoichiometric ratio) is 14.7:1 for petrol, 15.7:1 LPG and 14.5:1 Diesel

    [/smartarse] :D
     
    750E-II_29Rbloke, Apr 15, 2013
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