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Clutch/Transmission issue?

Discussion in 'XJ Technical Chat' started by styx84, Apr 30, 2013.

  1. styx84

    styx84 New Member

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    Location:
    South Bend, IN
    Hello all. I'm having a problem with my 1982 XJ750 Maxim. I've had it for about 3 years, it just turned 24k miles.

    At the end of last season in 1st and 2nd gear whenever I hit 4500-5000rpm I'd lose all acceleration and the bike would rev extremely fast like it was in neutral, the second I let off the throttle it'd be fine and I could give it gas again. This all happens without ever touching the clutch lever or shifter, just the throttle.

    3rd, 4th, and 5th I can run to 9k without a hitch.

    I thought it was the clutch slipping, but I just replaced the entire clutch, bolts, washers, friction and steel discs, and springs. And it's still doing the exact same thing.

    I run valvoline 20w/50 motorcycles oil and Napa filters.
    Neutral is easy to find, it shifts through all gears fine.

    Anyone have any ideas?
     
    styx84, Apr 30, 2013
    #1
  2. Magiccowinuse

    Magiccowinuse Member

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    Not sure how similar the 750 clutch is to my 550 or if the 750 even has it. But, if your bike has a "boss" disc I believe it is, are you positive it is in the correct spot? My 550 did this too when I had the boss disc in the wrong spot. Maybe you fixed the clutch slip from a worn clutch but caused the same problem with incorrect install.

    bigfitz52 has a write up on replacing the church which is extremely helpful but I cannot find it right now.

    I may be wrong, but anyways, welcome to the community.
     
    Magiccowinuse, May 2, 2013
    #2
  3. mlew

    mlew Well-Known Member

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    Clutch slipping is mostly felt in higher gears and not in 1st and 2nd. Is there any noise when it happens?
     
    mlew, May 2, 2013
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  4. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    The 650/750/900s don't have the clutch boss spring w/special friction disc.

    My first thought would be to be sure you have the correct number of plain and friction plates; but I'm at a loss. POPPING OUT of gear is different from slippage that can be "modulated away" with only the use of the throttle; the symptoms just don't add up.
     
    bigfitz52, May 3, 2013
    #4
  5. livingdeadlyxj650

    livingdeadlyxj650 Member

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    My bike pops out of second if I hit around 5 k and I promise you I have had it pop back in a few times once I lay off the throttle. Not everytime though.
     
    livingdeadlyxj650, May 3, 2013
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