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another CL optimist

Discussion in 'Hangout Lounge' started by Polock, Mar 3, 2017.

  1. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    That’s an’86 xj700 airhead that would theoretically be bored out of the 999 is correct. It’s NOT a 900r engine on it. To bore a 700 out to 1000 is crazy.... the cyl wall would so thin, I’d think it would self destruct.

    dfox
     
  2. McTavish

    McTavish Active Member

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  3. Simmy

    Simmy Well-Known Member

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  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    looks like a 700n
     
  5. kerriskandiesinc

    kerriskandiesinc Active Member

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    Could you even take that out close to 900...or even worse( better!) 999?

    The 748 can surely only reliably be taken out to...853cc.....the first 900....anything more requires stroking too,??

    I know someone on here found me a 'big bore' kit that was 'only' 818cc....nice, but nowhere near 898cc even !!
     
  6. XJ550H

    XJ550H Well-Known Member Premium Member

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  7. Simmy

    Simmy Well-Known Member

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    the 853 has both a bigger bore and stroke than the 750.
     
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  8. kerriskandiesinc

    kerriskandiesinc Active Member

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    I thought it was just bored....and the 'bigger' 897 was stroked and bored!
     
  9. Simmy

    Simmy Well-Known Member

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    motor bore stroke displ
    XJ550 57 51.8 528.5
    5/6 hybrid 58.5 51.8 556.6
    FZ600 58.5 55.7 598.5
    XJ650 63 52.4 653.0
    XJ700 65 52.4 695.2
    XJ750 65 56.4 748.2
    XJ900 83 67 60.5 852.8
    XJ900 85 68.5 60.5 891.4
    XJ750-X 68 51.6 749.2
    XJ-911-X 75 51.6 911.4
     
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  10. Simmy

    Simmy Well-Known Member

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  11. Fuller56

    Fuller56 Well-Known Member

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  12. Door dude

    Door dude Active Member Premium Member

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    I wonder why it has a oil catch under it ?
     
  13. XJ550H

    XJ550H Well-Known Member Premium Member

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    because the oil stains did not come out in the area in front of the car
     
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  14. Tim O

    Tim O Active Member

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    I also like the brown shag door / bike guard.
     
  15. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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  16. Simmy

    Simmy Well-Known Member

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  17. Timbox

    Timbox Well-Known Member

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    ^^^ That is interesting. Hope they find the right home for her...
     
  18. McTavish

    McTavish Active Member

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  19. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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  20. kerriskandiesinc

    kerriskandiesinc Active Member

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    Yup looks like its been despatched....... ;)
    Motor does look quite nice though.....wonder how it sounds! ?
     

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