Show your vintege japanese inline four

Discussion in 'Old's Cool' started by nedodjija, Jul 30, 2009.

  1. Tosh Togo

    Tosh Togo Long timer

    Joined:
    Nov 21, 2010
    Oddometer:
    1,594
    The XJ900 engine will bolt right in...but there will be airbox, exhaust, and probably engine/fuel tank interference issues. I picked up a 900 with that idea, then did some serious measuring. :huh

    Do-able, but not easy....there would be lots of parts-massaging required: you'd have go with individual air filters and re-jet, as there's no way to get the 900 airbox into the 650 frame. The 900's oil cooler is just different enough that it's not a bolt-on, due to the cooler's frame mounting points being classic Japanese same-same but not same-same. :cry The exhaust system might be be a minor can of worms too. The 900 uses Mikunis instead of the 650/750's Hitachis, so expect more fiddling there in ways than you might not expect... :puke1

    Let's just say that a 750 engine puts the 650's petcock noticeably closer to the valve cover. :D

    All the XJ650/700/750/900 engines bolted into the frame by attachment points below the cylinder base gasket, so all the engines will fit the same hole. The surrounding bits may not be so easy.


    I'm currently using a 750 Seca engine, XJ750 CDI box, 750 airbox, 650 Seca exhaust system. Had to shave the sidecovers a bit to get them to fit the slightly larger airbox, and both bikes share the same carbs with different jetting.

    I'm using slightly taller gearing, and it'll pull from 25 mph in top gear, never needs to downshift to pass, and the fuel mileage is the same as before. :D

    If you go this route, be aware that there are two different types of oil-level sensors in XJ-land, and choosing the wrong one for the swap will result in an oil light that only goes off when the engine stops. :deal
  2. zap2504

    zap2504 Dave E.

    Joined:
    Feb 15, 2006
    Oddometer:
    754
    Location:
    Middletown, PA
  3. Houseoffubar

    Houseoffubar HoFmetalworks.com

    Joined:
    Dec 4, 2010
    Oddometer:
    1,874
    Location:
    Bothell, Washington
    Not my bike, it is Eddie Lawson's, the Orange bike is his 500GP Championship bike!
  4. Bama Gringo

    Bama Gringo Been here awhile

    Joined:
    Dec 14, 2008
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    198
    Location:
    Matt, new to nashville, tn
  5. Houseoffubar

    Houseoffubar HoFmetalworks.com

    Joined:
    Dec 4, 2010
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    Location:
    Bothell, Washington
    I always liked the early GS's!:evil
  6. Tosh Togo

    Tosh Togo Long timer

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    That link helps, but take their info with a bit of skepticism... some of it isn't quite dead-nuts on.


    650 on the left, 750 on the right.

    [​IMG]
  7. kawaman21

    kawaman21 n00b

    Joined:
    Feb 9, 2011
    Oddometer:
    6
    Location:
    scotland
    thanks house,i like mine better too:D though given a choice i'd swap mine for lawson's original or his 500,even a set of his leather's (might be a snug fit though:lol3).
  8. mikenj

    mikenj Adventurer

    Joined:
    Nov 23, 2010
    Oddometer:
    48
    I'd say so........whats vintage? 20 yrs or older, right? BTW, very nice oil cooled gixxer!

    Now I need to show mine. :D

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  9. Brewtus

    Brewtus Buffoonery, Inc.

    Joined:
    Jul 30, 2008
    Oddometer:
    3,912
    Location:
    Albuquerque, New Mexico
    Cool thread. I managed to collect some GPz's over the years-

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    An '82 1100, '82 750, and my old racebike, an '83 550. I recently sold the 1100 (DAMMIT!!!! :cry) to a guy down in Carlsbad, NM who is taking very good care of it (DAMMIT!!!! :cry). Shame too, that 1100 ran exceptionally well. I deeply regret selling it. The 750 is a very clean survivor with a fresh engine featuring a balanced and lightened crank, ported head and a 1st overbore done by the previous (and original!) owner. The 550 has not led such a charmed life. Raced in the '80's, abused by subsequent owners since, it's a beat-up warrior that still serves as a reliable daily commuter. The chrome Kerker pipe was purchased new just a few years ago, discovered in the attic at Hap Jones distributing, and was probably the last new GPz550 pipe in the country. I wanted black, but you take what you can get... :D
  10. achtung3

    achtung3 Long timer

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    Mar 6, 2010
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    1,184
    Location:
    Central Coast California
    Restoring it, still.

    CIMG3161-Y-Composite.jpg
  11. Short Shins

    Short Shins Adventurer

    Joined:
    Jun 5, 2006
    Oddometer:
    29
    Location:
    Wellington, New Zild
    heres my 1977 Honda C750

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  12. mikenj

    mikenj Adventurer

    Joined:
    Nov 23, 2010
    Oddometer:
    48
    brewtus, here's a GPZ1100 B2 I just picked up. Its a keeper!!! Been sitting 17 years........

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  13. Ozracer

    Ozracer Auspommie

    Joined:
    Aug 25, 2005
    Oddometer:
    444
    Location:
    Melb OZ
    [​IMG]

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    1979 Suzuki GS 1000S
    Phillip Island Austailia Race Track Jan 2011 during the Island Classic Meeting
  14. Brewtus

    Brewtus Buffoonery, Inc.

    Joined:
    Jul 30, 2008
    Oddometer:
    3,912
    Location:
    Albuquerque, New Mexico

    Very nice!! :thumb

    Now I miss mine even more....... :cry
  15. cybrdyke

    cybrdyke In the Dark

    Joined:
    Dec 4, 2010
    Oddometer:
    317
    Location:
    way back up in the woods among the evergreens

    I'm bumpin' up this year and a half old thread cuz I LOVE this bike.....
  16. dilandau

    dilandau Been here awhile

    Joined:
    Aug 29, 2009
    Oddometer:
    828
    Location:
    oakland, ca
    my fz

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  17. ntm1973

    ntm1973 Been here awhile

    Joined:
    Mar 7, 2012
    Oddometer:
    131
    Location:
    PA
    My 73 cb350f to be put up for sale in the spring, I'll hate to see it go. What a fun revy little bike.

    [​IMG]
  18. Durangoman

    Durangoman Yeah its me!

    Joined:
    Feb 12, 2006
    Oddometer:
    773
    Location:
    Durango
    Think I will be hangin a for sale sign on it.....


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    KZ650
  19. Pigford

    Pigford British

    Joined:
    Sep 27, 2009
    Oddometer:
    1,023
    Location:
    North Dorset, UK
    Heres my current Jap Inline 4's.....

    1978 Z1000A2 which I've had for about 8 yrs:

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    My 1980 Z1000 MkII (1392cc) which I built in 2010:

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    1981 Harris Magnum 1 (Z1000 engine) - as is at the moment (been building since Oct 2011):

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    And my latest aquisition... 1977 GS750 project:

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    Can't get enough of these Old Skool Muscle Machines :evil
  20. noman

    noman Long timer

    Joined:
    Jun 4, 2007
    Oddometer:
    1,365
    Location:
    the sticks, southern vt
    my previous cb550f in west haven vt (currently in roccitycafe.com gallery)

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    previous 76 cb750k (ignore my stupid mug) at the same location actually. slammed it front and back, sissy bar, high bars. good cruiser.

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    in the middle of a cb350f project. finished a full refresh on the front and rear, have since yanked the engine to refresh/paint the frame.

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    i refresh one or two a year, this kinda stuff keeps me outta the wife's kitchen.