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Thread: 2004 Tuono rough running issue

  1. #1
    apriliaforum newb
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    2004 Tuono rough running issue

    Hey there,

    I have a 2004 Tuono and I love the bike but it runs terribly under 4K rpm when itís warm.
    Fully warmed up, cruising at 20mph in 1st gear is intolerable. It starts bucking and cutting out sporadically. I have to play with the clutch constantly to make it smooth.

    Iíve tried to sync the throttle bodies and have them pretty damn close. Vac lines all looked fine, but Iím not sure if Iím missing something in there. I am mechanically inclined, but I am very new to Aprilias!

    Any advice is much appreciated.

    ~~~~~~~~~~~~

    Update for anyone interested:

    Previous owner deleted the Charcoal canister and ran the tank vent straight to the throttle body.

    Capped that off properly and it rides significantly better! Need to fine tune the sync still.
    Last edited by Yert315; 06-09-2019 at 01:55 AM.

  2. #2
    apriliaforum expert FASTER !'s Avatar
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    https://www.apriliaforum.com/forums/...ke-with-an-EGA

    Hey Yert , refer to the 1000cc FAQ section in the linky above. I have two of those , both with just over 100k kilos on and still going great !!!

    The link has more than enough info to get your machine running acceptably well , both my machines will pull 3rd gear at 3000 rpm without bother , so it can be done.
    SPEED IS RELATIVE OFFICER

  3. #3
    apriliaforum expert redratbike's Avatar
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    A gearing change would help as well
    please get in touch if you would like a modded collector,adjustable lock-stops or quick release tank and seat pins

  4. #4
    apriliaforum expert spencer's Avatar
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    maybe oiling the chain too
    2004 Tuono

  5. #5
    apriliaforum expert SoulDaddy's Avatar
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    So how does it run above 4,000?
    How many miles are on it?
    Is the gas old?
    Tried any injector cleaner?
    Plug wires tight?
    Plugs old?
    Battery terminals tight?

    Face reality, or perish, I guess.
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  6. #6
    apriliaforum expert FTM's Avatar
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    That chain does look tight …… and rusty.
    FUCK THE MAGS


    Never live the same day twice. (My wife nearly pissed her self laughing when she read my signature line, because she reckons she has never met anyone in the whole of her life who hates change more than me) She does have a point .

  7. #7
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    Thanks for the advice! I will get on to those suggestions next.

    The chain has since been well lubed and tensioned properly! Itís also only about 8 months/5k miles old.

  8. #8
    apriliaforum expert madart's Avatar
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    What Souldaddy said first.

    Then have another go at the bypass screws on the throttle bodies.
    Idle screw backed right off.
    One turn out from seated on the front cylinder screw.
    1 1/2 turns out on the rear.

    See if you can get it idling smoothly without the idle screw first, and then adjust that for a faster idle.

    Pull your ECU out and set the trimpots to 12 0' clock.

    Test.

    Start from there.

    Does it have a standard exhaust? And do you know if it has a stock chip?

  9. #9
    apriliaforum Member
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    Sorry, I do not set the throttle bodies on RSV/Tuono before, I just read a lot of times, that this setting is really different on V60 APs. the setting for front and rear cylinder cannot be equal, there has to be difference, but I do not know exact difference.
    Your problem just looking to be related to this from my point of view....

  10. #10
    apriliaforum expert madart's Avatar
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    Quote Originally Posted by kralik View Post
    Sorry, I do not set the throttle bodies on RSV/Tuono before, I just read a lot of times, that this setting is really different on V60 APs. the setting for front and rear cylinder cannot be equal, there has to be difference, but I do not know exact difference.
    Your problem just looking to be related to this from my point of view....
    According to Gabro, the throttle body screw setting is one turn out for the front cylinder, one and a half turns out on the rear for the standard throttle bodies.
    Trim pots on the ECU you should start with both at 12 o' clock. for a base setting.

  11. #11
    apriliaforum expert SoulDaddy's Avatar
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    A little instruct on dialing in the trims would be nice, if anybody cares to. They've always been a mystery to me, quite frankly.

    Face reality, or perish, I guess.
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  12. #12
    apriliaforum expert madart's Avatar
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    The trims effect mainly idle and off idle running much the same as the throttle body screws do but in a different way.

    The brass throttle body screws control the air volume passing through the injectors. The ECU trimpots control the time the injectors are open.

    It's best to adjust the throttle body screws first with the idle screw on the right backed right off and both trimpots set to 12 o' clock.

    Start the adjustment with the screws one turn out on the front and 1.5 on the rear. Try to get a slow, smooth idle by opening the screws and then backing them off to get ass slow and smooth an idle as possible. The rear cylinder should always be a bit further out (more air) than the front.

    When the idle is OK (it won't be perfect), start adjusting the trimpots incrementally.to smooth the idle more. Anticlockwise is lean and clockwise rich. The final settings are always between 10 and 2 o' clock, but more ususally between 11 and 1.

    Then turn the idle screw up to where you like it. U sually 12- 1500 revs.

    It should be done with the engine at operating temperature.

    If the mixture and idle are good, the bike should smooth out considerably under 4000 revs with little hunting or surging.

  13. #13
    apriliaforum expert SoulDaddy's Avatar
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    Outstanding. Much appreciated.

    Face reality, or perish, I guess.
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  14. #14
    apriliaforum expert kzmille's Avatar
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    Quote Originally Posted by madart View Post
    ...The brass throttle body screws control the air volume passing through the injectors...
    Sorry to be picky but it is air bypassing the throttle plates. No air passes through the injectors.
    This is America. Use your turn signals or WE WILL KILL YOU - remember Sandra Bland

  15. #15
    apriliaforum expert madart's Avatar
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    Quote Originally Posted by kzmille View Post
    Sorry to be picky but it is air bypassing the throttle plates. No air passes through the injectors.
    Not a problem. I was searching for the right term. Right you are of course.

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