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H pipe removel?

Discussion in 'XJ Modifications' started by Fireancient, Nov 21, 2015.

  1. Fireancient

    Fireancient New Member

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    Today i took my bike to a shop to get a full tune and cleaning of the carbs the guy at the shop told me if i waanted to get better economy on the bike i could remove the H pipe linking the exhaust i was wonder ing if this is true ot of it is aa bad idea the bike i have is a 1982 650 maxim
     
    Fireancient, Nov 21, 2015
    #1
  2. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    That mechanic is (honestly) full of shit. You will not get better fuel economy by just removing any part of the exhaust system. The machine was built when fuel economy was on the minds of every manufacturer. If Yamaha could have shown even a 1 MPG increase by leaving a part off (cost savings to them; advertising advantage to them), then they would have done it.
     
    k-moe, Nov 21, 2015
    #2
    rocs82650 and Alan63 like this.
  3. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Damn, I'm crabby lately...... o_O
     
    k-moe, Nov 21, 2015
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  4. Fireancient

    Fireancient New Member

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    thnx for the advice his exact words were to remove the h pipe and run new pipes and that it might affect a little of the power but id get better mileage out of it
     
    Fireancient, Nov 21, 2015
    #4
  5. rocs82650

    rocs82650 Well-Known Member

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    The YICS (Yamaha Induction Control System) on the '82 650 is a fuel efficiency system.

    Gary H.
     
    rocs82650, Nov 21, 2015
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    k-moe likes this.
  6. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Does he perhaps, just happen to sell and install custom exhausts?
     
    k-moe, Nov 21, 2015
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  7. quebecois59

    quebecois59 Well-Known Member

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    It is there for a reason. On XS650 twins, it made it more difficult to balance the carbs properly when you route two straight exxhaust from front to rear without any cross pipe.
     
    quebecois59, Nov 21, 2015
    #7
  8. hogfiddles

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

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    That's a bunch of malarkey. Don't do it. The h-pipe balances the exhaust .... It's basically the collector box, if you will, for your bike. If he's telling you that:

    1.. Is he trying to sell a nice overpriced exhaust to you too?

    2. He doesn't know much about your bike

    3. Don't go back to him. WE are your mechanic, and WE are FREE
     
    hogfiddles, Nov 25, 2015
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    DeanXJ750, rocs82650, k-moe and 2 others like this.

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