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strange noise under heavy acceleration???
https://ukbeg.com/forum/viewtopic.php?f=8&t=15531
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Author:  motoqueiro [ 18 Sep 2012 20:03 ]
Post subject:  strange noise under heavy acceleration???

I really can't explain very well, it's like a tic tic tic, kind like when the metal is cooling down
that only happens on heavy acceleration, and is something that is very rapid tictictic
can it be detonation???
sorry if it sound stupid

Author:  pash [ 18 Sep 2012 20:23 ]
Post subject:  Re: strange noise under heavy acceleration???

Knocking... Pinking... Detonation...

Check fuel octane number and ignition timing...

Author:  Ash [ 18 Sep 2012 21:08 ]
Post subject:  Re: strange noise under heavy acceleration???

I get that a lot (its a scared screaming sound :oooops: )

Sorry Chief

Author:  motoqueiro [ 19 Sep 2012 20:02 ]
Post subject:  Re: strange noise under heavy acceleration???

Its 95 octane for 7 years now
going to check the timing
thinking of the octane, it can be because the low cost fuel I'm feeding her
thanks pash

Author:  spen [ 21 Sep 2012 09:37 ]
Post subject:  Re: strange noise under heavy acceleration???

Does it alter as the revs rise and fall?

Does it alter with road speed?

Author:  motoqueiro [ 21 Sep 2012 17:40 ]
Post subject:  Re: strange noise under heavy acceleration???

it only occurs when the ambient temperature is extremely hot, and let's say, I'm cruising at 3000 rpm and give it a full throttle, that's when it starts, as soon the rpm stabilizes or I reduce throttle it stops.
doesn't matter the gear or speed im doing, it's only on hard acceleration

Author:  spen [ 21 Sep 2012 17:54 ]
Post subject:  Re: strange noise under heavy acceleration???

Yep. Seems like pinking could be the culprit..... always worth checking other avenues though......

Author:  Adam [ 21 Sep 2012 17:58 ]
Post subject:  Re: strange noise under heavy acceleration???

motoqueiro wrote:
it only occurs when the ambient temperature is extremely hot, and let's say, I'm cruising at 3000 rpm and give it a full throttle, that's when it starts, as soon the rpm stabilizes or I reduce throttle it stops.
doesn't matter the gear or speed im doing, it's only on hard acceleration


This is the classic scenario for this to happen. As has been said before, check your timing. Your motor will be grateful ;)

Author:  motoqueiro [ 21 Sep 2012 18:24 ]
Post subject:  Re: strange noise under heavy acceleration???

Ok, so, apart from the timing what should I also take a lock at

Author:  spen [ 21 Sep 2012 20:14 ]
Post subject:  Re: strange noise under heavy acceleration???

Fuel quality.... :?:

Author:  motoqueiro [ 22 Sep 2012 13:09 ]
Post subject:  Re: strange noise under heavy acceleration???

ok, the timing is spot on, must be the fuel grade
thanks guys :yup:

Author:  motoqueiro [ 22 Sep 2012 14:23 ]
Post subject:  Re: strange noise under heavy acceleration???

a photo from the spark plugs. they seem good to me
Image

Author:  Maz [ 22 Sep 2012 14:31 ]
Post subject:  Re: strange noise under heavy acceleration???

What make/grade are those plugs ?

Author:  motoqueiro [ 22 Sep 2012 17:08 ]
Post subject:  Re: strange noise under heavy acceleration???

they are the harley 10R12A ones

Author:  Maz [ 22 Sep 2012 17:14 ]
Post subject:  Re: strange noise under heavy acceleration???

That's OK then ;)

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