1. Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

You guys ever do a XJ engine swap?

Discussion in 'XJ Technical Chat' started by nejeff, Apr 19, 2012.

  1. nejeff

    nejeff New Member

    Messages:
    15
    Likes Received:
    0
    Trophy Points:
    1
    I have this 80' XJ650 with low compression on one cylinder. Not a valve issue so something deeper. Audiblly it sounds very bad. Picked up a 850 triple tonight out of a 79' and it was (supposedly) a runner when pulled. Any of you guys ever do or hear of this being done? What am I looking at? Talk to me guys..your the XJ experts...give me some direction
     
    nejeff, Apr 19, 2012
    #1
  2. slomo85

    slomo85 Member

    Messages:
    119
    Likes Received:
    1
    Trophy Points:
    16
    Location:
    Imperial Beach, CA
    What did you get the motor from? Did the XJ's even ever come in a 3 cylinder variant? Never heard of that...
     
    slomo85, Apr 19, 2012
    #2
  3. wwj750

    wwj750 Member

    Messages:
    371
    Likes Received:
    1
    Trophy Points:
    18
    Location:
    central minnesota
    a triple in an XJ will never happen-way too many variables, sorry.
     
    wwj750, Apr 20, 2012
    #3
  4. nejeff

    nejeff New Member

    Messages:
    15
    Likes Received:
    0
    Trophy Points:
    1
    No, the 850's were in the XS line only in 80' and 81', I was wrong on the 79'. It was also a shafty
     
    nejeff, Apr 20, 2012
    #4
  5. nejeff

    nejeff New Member

    Messages:
    15
    Likes Received:
    0
    Trophy Points:
    1
    I suppose the shaft length is probably a big one, wasn't thinking of that!
     
    nejeff, Apr 20, 2012
    #5
  6. darkfibre

    darkfibre Member

    Messages:
    671
    Likes Received:
    4
    Trophy Points:
    18
    Location:
    Perth, Australia
    As long as the exhausts are not in line with the frame, its just engineering.
     
    darkfibre, Apr 20, 2012
    #6
  7. wwj750

    wwj750 Member

    Messages:
    371
    Likes Received:
    1
    Trophy Points:
    18
    Location:
    central minnesota
    I guess I should have said-an XS triple will never fit into an xj "EASILY". Nothing is really impossible, just referring to motors actual dimensions, motor mount locations, electrics, etc, etc, etc. IMHO, it would just be too much work to be worth it. & If I remember correctly, the XS triples are prone to overheating. Best of luck to you whatever you decide to do. W.J.
     
    wwj750, Apr 20, 2012
    #7
  8. TIMEtoRIDE

    TIMEtoRIDE Active Member

    Messages:
    4,686
    Likes Received:
    10
    Trophy Points:
    38
    Location:
    Clermont FL near Orlando
    If you have a title for the 850 frame - you build the 850.

    If you JUST HAVE TO put the 850 into an XJ, then the alignment of the driveline and driveshaft components is so critical, that it would be easier to SPLIT BOTH FRAMES and graft the top half of the XJ to the lower frame and swingarm of the XS.

    You may as well change the fork angle and build something REALLY radical for all that effort.

    Or you source another XJ motor for $200.
     
    TIMEtoRIDE, Apr 20, 2012
    #8
  9. nejeff

    nejeff New Member

    Messages:
    15
    Likes Received:
    0
    Trophy Points:
    1
    Turns out its a 750. Its really a shame you can't get sell a motor like this but with location & shipping costs its really hard to do. Same goes for sourcing another 650 which is what I guess I'll attempt to do
     
    nejeff, Apr 20, 2012
    #9
  10. wingnut325

    wingnut325 Member

    Messages:
    254
    Likes Received:
    9
    Trophy Points:
    18
    Location:
    Havelock North Carolina
    nejeff where in the country are you? We have a 82 650 engine here in NC that is for sale at a good price.
     
    wingnut325, Apr 20, 2012
    #10
  11. 82maxim

    82maxim New Member

    Messages:
    28
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    South Lebanon, OH

    How much you asking?, and is the trans good?
     
    82maxim, Apr 28, 2012
    #11
  12. wingnut325

    wingnut325 Member

    Messages:
    254
    Likes Received:
    9
    Trophy Points:
    18
    Location:
    Havelock North Carolina
    Trans is good. Let me check with the partners and I'll let you know
     
    wingnut325, Apr 30, 2012
    #12

Share This Page