Engine vibration
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Joined: Nov 2007
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From: Pinellas County, FL
Engine vibration
I have a '95 FXDWG with an Evo engine. I recently switched from dino to AMSoil for all my fluids. Ever since, I have noticed a high frequency vibration in my footpegs. It only happens when it is under power ( not at idle). I was wondering if anyone else has had this problem and if it is normal.
Tourer
Joined: Sep 2006
Posts: 357
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From: Valencia, Spain
RE: Engine vibration
I would test the oil levels, specially transmission and primary to check if they are not overfilled. I don't know if another thing can cause the vibrations but this should be the first check point.
Let us know how are your levels.
Regards,
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Javi
Let us know how are your levels.
Regards,
--
Javi
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Joined: Nov 2006
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RE: Engine vibration
Cabledude,
depending on how religious you were (or the previous owner was) with your oil changes when you were using the dino oil, it is possible that the Amsoil has cleaned your flywheels. Sludge can build up on the flywheels and conrod and form a "natural" balance weight because it will naturally move to the area of unbalance (due to centripital force). Over time this hardens and effectively balances these engine components. Synthetic oil has an extremely efficient detergent additive package (from what I've researched, synthetic oils are able to have a higher level of detergent additives due to their higher flashpoint and Noack volitility). These detergents WILL clean the inside of your engine and, as a consequence, could have cleaned this balance sludge from the reciprocating parts therein. As an aside, when I get on the gas on my 98 FXSTC I too get quite a lot of vibration. This is the nature of the EVO (mainly due to the stocktwin spark ignition). It would also possibly be worthwhile checking all of your motor mounts for correct torque.
Of course, none of this could be the reason for what you are experiencing. It's just a theory.
Cheers.
depending on how religious you were (or the previous owner was) with your oil changes when you were using the dino oil, it is possible that the Amsoil has cleaned your flywheels. Sludge can build up on the flywheels and conrod and form a "natural" balance weight because it will naturally move to the area of unbalance (due to centripital force). Over time this hardens and effectively balances these engine components. Synthetic oil has an extremely efficient detergent additive package (from what I've researched, synthetic oils are able to have a higher level of detergent additives due to their higher flashpoint and Noack volitility). These detergents WILL clean the inside of your engine and, as a consequence, could have cleaned this balance sludge from the reciprocating parts therein. As an aside, when I get on the gas on my 98 FXSTC I too get quite a lot of vibration. This is the nature of the EVO (mainly due to the stocktwin spark ignition). It would also possibly be worthwhile checking all of your motor mounts for correct torque.
Of course, none of this could be the reason for what you are experiencing. It's just a theory.
Cheers.
Tourer
Joined: Nov 2007
Posts: 448
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From:
RE: Engine vibration
ORIGINAL: gigiflip
it is possible that the Amsoil has cleaned your flywheels. Sludge can build up on the flywheels and conrod and form a "natural" balance weight because it will naturally move to the area of unbalance (due to centripital force). Over time this hardens and effectively balances these engine components. Synthetic oil has an extremely efficient detergent additive package (from what I've researched, synthetic oils are able to have a higher level of detergent additives due to their higher flashpoint and Noack volitility). These detergents WILL clean the inside of your engine and, as a consequence, could have cleaned this balance sludge from the reciprocating parts therein. As an aside, when I get on the gas on my 98 FXSTC I too get quite a lot of vibration. This is the nature of the EVO (mainly due to the stocktwin spark ignition). It would also possibly be worthwhile checking all of your motor mounts for correct torque.
it is possible that the Amsoil has cleaned your flywheels. Sludge can build up on the flywheels and conrod and form a "natural" balance weight because it will naturally move to the area of unbalance (due to centripital force). Over time this hardens and effectively balances these engine components. Synthetic oil has an extremely efficient detergent additive package (from what I've researched, synthetic oils are able to have a higher level of detergent additives due to their higher flashpoint and Noack volitility). These detergents WILL clean the inside of your engine and, as a consequence, could have cleaned this balance sludge from the reciprocating parts therein. As an aside, when I get on the gas on my 98 FXSTC I too get quite a lot of vibration. This is the nature of the EVO (mainly due to the stocktwin spark ignition). It would also possibly be worthwhile checking all of your motor mounts for correct torque.
- can anyone comment on this ?
.
Tourer
Joined: Nov 2007
Posts: 448
Likes: 3
From:
RE: Engine vibration
ORIGINAL: gigiflip
when I get on the gas on my 98 FXSTC I too get quite a
lot of vibration. This is the nature of the EVO (mainly due
to the stocktwin spark ignition)
when I get on the gas on my 98 FXSTC I too get quite a
lot of vibration. This is the nature of the EVO (mainly due
to the stocktwin spark ignition)
of the EVO is caused by itsdual-spark ignition
(ie, the wasted spark system) ?
.
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Joined: Nov 2007
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From: Pinellas County, FL
RE: Engine vibration
I checked the fluids and they are all full. The engine oil still looks good. I didn't have time to check the mounts, yet. I'll get them as soon as I can and post afterwartds. Thanks for all the help so far.
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