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Thread: my tuono v4 horror story. i need advice.

  1. #46
    apriliaforum newb
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    No the connecting rod is there you can see the top of it through the hole in the top of the damaged piston ��. It is the extended warrantee company not aprilia who I'm fighting hopefully soon with the attorney. And from my reading of this forum, I thought you can't swap with rsv4 engine.
    2012 Tuono v4 aprc 12k miles blown engine just happened Dec.
    2000 zx9r. 55k miles currently a tip to tail check and overhaul

  2. #47
    apriliaforum Junkie Handy Rodder's Avatar
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    valve hit the piston. broke and rattled around and busted everything else. gee wiz i wonder how a valve dropped after valve adjustment. things that make you go hmm.
    what cylinder? front or rear bank?
    13 Tuono
    08 CRF450R
    06 K1200R
    03 YZ450F
    02 GSXR-1K
    96 CBR900
    86 Fazer 700

  3. #48
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    Rear bank.
    2012 Tuono v4 aprc 12k miles blown engine just happened Dec.
    2000 zx9r. 55k miles currently a tip to tail check and overhaul

  4. #49
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    Dealer says they can't say for certain what happened. They filled with warrantee co. Saying they believed can chain tensioner failed throwing off timing.
    2012 Tuono v4 aprc 12k miles blown engine just happened Dec.
    2000 zx9r. 55k miles currently a tip to tail check and overhaul

  5. #50
    just another Aprilia fanatic amauri's Avatar
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    Quote Originally Posted by the sofa king View Post
    Dealer says they can't say for certain what happened. They filled with warrantee co. Saying they believed can chain tensioner failed throwing off timing.
    Bulshit
    Never accept mediocrity, always demand competence.

    Certified Aprilia Moto Service in Southern California
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  6. #51
    just another Aprilia fanatic amauri's Avatar
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    Let me elaborate a bit.

    If a tensioner failed or if sprocket bolts loosened up, you would have valve to piston contact on both cylinders.

    Did the shop who adj the valves give you a log of what the clearances were at before they adj them?
    Never accept mediocrity, always demand competence.

    Certified Aprilia Moto Service in Southern California
    Call me at 714 892-4056 for appointment

  7. #52
    apriliaforum expert marcodarq's Avatar
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    While i agree with Amauri, is it possible that the dealer is trying to file a claim that the warranty company is more likely to accept and approve the repair?
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  8. #53
    just another Aprilia fanatic amauri's Avatar
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    That could be, but keep in mind that the extended warranty companies have their own experts who know how to analyse engine failures.

    The dealer should not be making up a BS story, instead they should just tell it like it is... a valve broke and fell into the cylinder. Simple as that.


    Question for the OP:

    What exhaust do you have on the bike, and do you have a Race map?
    Never accept mediocrity, always demand competence.

    Certified Aprilia Moto Service in Southern California
    Call me at 714 892-4056 for appointment

  9. #54
    apriliaforum expert PRC001's Avatar
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    Quote Originally Posted by amauri View Post

    What exhaust do you have on the bike, and do you have a Race map?
    Very good question. I haven't seen that kind of mess since my 2 stroke days!
    2015 Tuono V4 1100 Factory
    Brembo RCS19 MC, Akrapovic Exhaust, GRT ECU, DNA filter, Lightech levers, rear-sets & chain adjusters, Evotech tail-tidy, Evotech fork & swingarm sliders, Cox Racing Rad Guard & Aprilia Factory Forged Alloys.

    2012 Tuono V4 APRC Fast
    Black.... Sold
    Yamaha MT-10 SP


  10. #55
    apriliaforum newb
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    The bike is totally stock. Yes, their view was it could have been a floating valve (which company won't cover for some reason) or cam tensioner, so that is what they filled as. The adjustment specs. ... i remember seeing them at one point but i don't have them personally to display. They did say not all needed adjustment.
    2012 Tuono v4 aprc 12k miles blown engine just happened Dec.
    2000 zx9r. 55k miles currently a tip to tail check and overhaul

  11. #56
    apriliaforum expert
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    To prove it was not valve float caused by over revving the motor, you can inspect the valve stems on all four valves for the broken cylinder. Examine the upper part of the stems - spring side. If one of the stems shows a brittle fracture with no signs of bending, then that is the valve that initiated the failure, and it's likely a manufacturing defect of that one valve. If all the stems show bending and ductility, then it's likely valve float that caused the failure. However, if it was valve float due to over rev, you would expect to see bent valves in all cylinders. I'll bet you see one valve stem with a brittle fracture.
    Hoosier, not hoser.
    2000.5 Mille R - Ti Shotguns & lots of Evo shtuff
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  12. #57
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    Is there possibly to get an Aprilia rep to inspect the engine himself to create a report that could help me? The dealer either is unwilling to place a specific cause or uneducated to do so, or perhaps worse knows they screwed up and is doing what they can to hide it.
    2012 Tuono v4 aprc 12k miles blown engine just happened Dec.
    2000 zx9r. 55k miles currently a tip to tail check and overhaul

  13. #58
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    Hmmm, just a thought. Since I have the factory repair manual I need to review the valve adjustment process to see if "special tools" are required. And ask the tech next time I'm there if he has one.
    2012 Tuono v4 aprc 12k miles blown engine just happened Dec.
    2000 zx9r. 55k miles currently a tip to tail check and overhaul

  14. #59
    apriliaforum Junkie Handy Rodder's Avatar
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    very good point

    Quote Originally Posted by amauri View Post

    If a tensioner failed or if sprocket bolts loosened up, you would have valve to piston contact on both cylinders.
    13 Tuono
    08 CRF450R
    06 K1200R
    03 YZ450F
    02 GSXR-1K
    96 CBR900
    86 Fazer 700

  15. #60
    apriliaforum expert MishMashRSV4's Avatar
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    Quote Originally Posted by the sofa king View Post
    Hmmm, just a thought. Since I have the factory repair manual I need to review the valve adjustment process to see if "special tools" are required. And ask the tech next time I'm there if he has one.
    Yes, there are indeed "special" tools required to do adjustment on the V4. I can think of two very distinct ones unique to the Aprilia V4 that are needed.

    Update - See this thread: http://www.apriliaforum.com/forums/c...in-the-chassis
    Last edited by MishMashRSV4; 01-23-2017 at 12:40 PM.

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