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My 2014 ST makes a slight knocking noise about 4000 rpm, is this normal?
- Thread starter sarecco
- Start date
Bob Denman
New member
:shocked: No
If it's from the engine: HELL no! :yikes:
Take it back to the dealer for further investigation... nojoke
If it's from the engine: HELL no! :yikes:
Take it back to the dealer for further investigation... nojoke
BajaRon
Well-known member
I found that the knocking I was hearing was my wife beating on the back of my helmet. But the RPM was more in the neighborhood of 8,000 RPM and the knocking was not 'Slight'! :yikes:
The dealer was of no help in my situation... :dontknow:
P.S. Sometimes a different lubricant can help quiet internal engine noise.
The dealer was of no help in my situation... :dontknow:
P.S. Sometimes a different lubricant can help quiet internal engine noise.
trikermutha
New member
Bob Denman
New member
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sledmaster
Member
What octane fuel were you using?
There have been times I have noticed some knocking noises as well. It comes and goes. Over the years I paid closer attention to what kind of fuel I was running and where it came from. I wondered if it was a bearing going, or actually slight detonation occurring. Only seems to happen on one of my Spyders, the 2013 ST-S.
I have come to the conclusion it is from less than ideal fuel quality. If I have good non-oxy premium then am forced to add some 87 octane with ethanol, it will start. Run that tank dry and go back to fresh 91 octane non-oxy premium and it goes away. But it is always in the back of my mind, what the hell is that noise that comes and goes......right now I chalk it up to fuel, it is the least constant variable over so many miles.
Could be too much load on the engine at 4,000 rpm for the given ground speed, also playing into the deto theory. The twin likes to rev.
There have been times I have noticed some knocking noises as well. It comes and goes. Over the years I paid closer attention to what kind of fuel I was running and where it came from. I wondered if it was a bearing going, or actually slight detonation occurring. Only seems to happen on one of my Spyders, the 2013 ST-S.
I have come to the conclusion it is from less than ideal fuel quality. If I have good non-oxy premium then am forced to add some 87 octane with ethanol, it will start. Run that tank dry and go back to fresh 91 octane non-oxy premium and it goes away. But it is always in the back of my mind, what the hell is that noise that comes and goes......right now I chalk it up to fuel, it is the least constant variable over so many miles.
Could be too much load on the engine at 4,000 rpm for the given ground speed, also playing into the deto theory. The twin likes to rev.
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