knocking /slapping noise ..revisited / SOLVED...

Discussion in 'Common Issues' started by albertaduke, May 21, 2019.

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  1. albertaduke

    albertaduke former airline pilot without the big bucks

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    last year I posted a problem I noticed on my 2013 roadster between 2500 and 3500 rpm while riding uphill a knocking/slapping kind of noise I could feel it very strongly in the footpegs more than hearing it so I stayed out of that rpm range and felt most likely something happened to the transmission
    after the shop opened up the motor nothing wrong was found yet the noise/slapping remained had the tuning shop remap the ECU . this was at the end of 2017 season then
    my garage burned down ....completely in feb 2018 and everything inside was burned car, bike bicycle freezer etc.etc.
    went looking for another roadster and bought a 2012 roadster.
    had the shop here move all performance bits on the new to me black beauty (nev 200hp kit jardine exhaust bought a new ramair had the tuner do his magic and...... went riding .....and noticed the same knocking /slapping noise .

    again I felt strongly that it had to be a transmission problem since the noise came from the block through the footpegs... again had the transmission removed and this time sent to robinson industries feeling that their backcutting gears and replacement of #4 gear for a stronger one will definitively solve this unnerving problem. all in all spent several thousands and yet the knocking still remained at that point I was really P....OFF...
    another member on the forum mentioned that he has had the same problem and had it solved by changing the tune on his ECU ... so I realized that maybe something to do with the fuel could be the problem....never thought of it before!!! on a lark i emptied the tank filled my weed eater, tractor and lawnmower with the regular and refilled the bike with chevron premium ..................AND WENT RIDING UPHILL..... where the knocking was so prevalent....holy mother of gears smooth running no slapping/knocking felt at all under every RPM smooth as silk as of today I believe DETONATION was causing the situation since I had the nev kit installed the compression ratio was upped some and that is what caused all the commotion .
    finally a stupid little solution was to switch to premium fuel anyway if any captain ever cross this situation save your pennies and get premium fuel as I learned it the expensive way. passing along this solution for what it is worth..
    on another subject another 22 days before the rocket and me fly to frankfurt for a fun time in the alps
     
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  2. Dawg68

    Dawg68 Nitrous

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    Safe travels And enjoy the trip
     
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  3. Nat67

    Nat67 Rockgoblin

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    :eek: Bloody hell, you don't seem to have much luck ? Are you sure that skiing is a good idea ? :thumbsdown: ;)
     
  4. warp9.9

    warp9.9 Pocałuj mnie w dupę

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    Currious was it Rob ?
     
  5. albertaduke

    albertaduke former airline pilot without the big bucks

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    not.. ....a fellow not big on forums
     
  6. albertaduke

    albertaduke former airline pilot without the big bucks

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    how about stopping in chilliwack for a beer on my way to vancouver on the 10th of june flying out the 11th
     
  7. Joesmoe

    Joesmoe IMOKUR2 Staff Member

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    Maybe it was thanks to you -- @Neville Lush was clear to me with the new cam (not your extra bits over which I'm envious) that the bike "runs better" on higher octane fuel.

    Glad you found it, and thanks for sharing.

    Yet another case of 'check the easy stuff first'.
     
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  8. albertaduke

    albertaduke former airline pilot without the big bucks

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    well skiing is a thing of the past as I lost one inch right leg from a tib and fib break in 87 on the official opening of the 1988 olympic downhill slope so we can say riding will be the norm this summer:D:D
     
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  9. barbagris

    barbagris Mad Scientist

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    Take an day or two and go through the Black Forest: Freiburg, Rotweil, Titisee etc. Cruise the north "coast" road of the Bodensee. I could happily live on the Bodensee coast.

    Whence to the Alps.

    I am a huge fan of the Austrian Alps. Sadly though, some of the more scenic places/roads require a very nimble chassis - and (when I was there anyway) had fairly frangible road surfaces.

    Jealous? - me? - Yup.

    I should be home (Brittany Ferries willing) should you decide to add Spain to the trip.

    If you are going into Switzerland - DO NOT FORGET THE MOTORWAY TAX THING.
     
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  10. Neville Lush

    Neville Lush www.nevillelushracing.com

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    Good news. Also good you did not pull the engine apart for nothing...:)
     
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