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Thread: Checking the valves

  1. #161
    Rider Warren's Avatar
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    Re: Checking the valves

    Its a pretty time consuming process. Are you sure you need to bother. Many of us are going 16-24K between adjustments.
    Warren
    2010 NT700V ABS Silver, #0225, "Arcee"
    1977 Yamaha XS650 (Sold)

  2. #162

    Re: Checking the valves

    Yeah, I'm at 22K since the last check
    Mark in beautiful Lago Vista Texas
    2011 NT #10168
    Previous: 1996 PC800 90K

  3. #163

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    Re: Checking the valves

    Looking at the rear valves, how do I determine which ones are intake and which are exhaust?? Honda manual does not show any information on this.

    Thanks,

    LeeU

  4. #164
    Moderator Phil Tarman's Avatar
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    Re: Checking the valves

    Lee, this might seem obvious, but on both front and rear cylinders, the exhausts are on the outside of the Vee, where the exhaust pipes are located, and the intakes are in the middle, where the airbox is. Hope this helps.
    Phil Tarman
    Greeley, CO
    NT700VA 2010 SN #0079 -- "Dudley" -- 125,000+ Miles
    IBA # 5811: SS1000(X3), BB1500, BBG
    2013 Four Corners Tour Finisher # 70
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  5. #165
    seagrass's Avatar
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    Re: Checking the valves

    Phil that is a very clear way to explain where the exhaust valves are and I am not sure I would have thought of it.

    Very well done.

    Seagrass
    Current Bikes owned 2007 NT700V, 1982 Honda CX500-TC (Turbo)
    NT700 Only

  6. #166

    Re: Checking the valves

    I adjusted the valves last weekend and replaced the spark plugs/air filter, 24K between checks. The intakes were within tolerance, but the exhaust valves had tightened up. Especially the front cylinder, right valve. Makes me wonder if the Honda Tech got that one correct as it's such a PITA to access. I had to redo the front cover a few times to ensure no leaks. One thing I learned is the bike will run fairly well without the airbox in place, something the PC800 would never do. I loosened the cowl and rotated the coolant reservoir tank to get at that difficult clamp, was not too bad to access it that way with a long screwdriver.
    Rear Cylinder
    Intakes: Both .006
    Exhaust: Both .007 - Set to .008
    Front Cylinder
    Intakes: Both .006
    Exhaust: Left = 007, Right .0057 - Set to .008

    Great tips in this thread, thank you to my predecessors.

  7. #167
    Site Supporter DirtFlier's Avatar
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    Re: Checking the valves

    [... I learned is the bike will run fairly well without the airbox in place, something the PC800 would never do.]

    Carbs are much more sensitive to the level of atmospheric pressure in the airbox. Fuel injection doesn't seem to care.

    In regards to the front cylinder's right side exhaust rocker, I added an long extension to my feeler gauge and came in from the side of the bike. With the side vent removed, if you look in just above the spark plug you can clearly see that rocker arm. :-)
    Last edited by DirtFlier; 10-18-2017 at 10:43 AM.

  8. #168

    Re: Checking the valves

    I made this tool in case the gauge slipped out of my hand. Worked great with the offset tips on the feeler gauges.

    20170929_175033.jpg

  9. #169
    rc_heli_nut's Avatar
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    Re: Checking the valves

    After adjusting the valves, but before installing the front cover, rotate the crank until the front exhaust valves are in the fully open position. The front cover will slip right into place, without the gasket snagging the adjusters.

    Brad

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