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I have a 1998 Aero VT1100C. I have been told that this engine is a single pin configuration. I know that it will vibrate....but man I can not ride more that 50 miles at speeds over 50. It makes my hands go numb, my feet and lower back hurt. I have checked everything.... Motor mounts, wheel round and balance, fork seals, shocks.... nothing is wrong. Is there anything else that may be causing this constant vibration..?

I really like this bike and do not want to sell it.... but if I can not minimize the vibration... it has to go.

ANY HELP WOULD BE GREATLY APPRECIATED.....UGH!
 

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I have a 1998 Aero VT1100C. I have been told that this engine is a single pin configuration. I know that it will vibrate....but man I can not ride more that 50 miles at speeds over 50. It makes my hands go numb, my feet and lower back hurt. I have checked everything.... Motor mounts, wheel round and balance, fork seals, shocks.... nothing is wrong. Is there anything else that may be causing this constant vibration..?

I really like this bike and do not want to sell it.... but if I can not minimize the vibration... it has to go.

ANY HELP WOULD BE GREATLY APPRECIATED.....UGH!
If you mean that both rods share the same crank pin then yes, most V-engines are the same.
Have you ridden any others to confirm your bike is worse than it should be?
 

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Yes I have. I rode a Honda Sabre 1100 yesterday and it was as smooth as glass. Zero vibration......


It seems that the 1998 - 2000 years are the only ones with the single pin engine.
 

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Yes I have. I rode a Honda Sabre 1100 yesterday and it was as smooth as glass. Zero vibration......


It seems that the 1998 - 2000 years are the only ones with the single pin engine.


What do you mean by "single pin engine"?
The crank shaft is the same part number from '95 to '00 in both the Aero and Sabre.
13300-MAH-000 - CRANKSHAFT - Honda OEM Parts - Cheap Cycle Parts
The engine design though is the same after '00. I did notice the pre-'95 crank has two seperate crank pins though if that's what you're referring to.
 

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this particular motor is a "Single" pin configuration. Both pistons are on one pin and move up and down at the same time. Dual pin is independent of each other and move up and down at opposite times.

My question is not whether it is single or dual... it is..... can I fix the vibration problem......
 

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this particular motor is a "Single" pin configuration. Both pistons are on one pin and move up and down at the same time. Dual pin is independent of each other and move up and down at opposite times.

My question is not whether it is single or dual... it is..... can I fix the vibration problem......


Yes, I know that :)
But without knowing what you were refering to I couldn't determine if it was relevant.
Have you done some basic diagnostics to determine if both cylinders are operating properly?
Header temperatures, fresh spark plugs and such.
Was the bike in service when you bought it or had it been sitting for some time?
 

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ok....... if you read my original post.........this was in it. It vibrates from the moment you start it.

I have checked everything.... Motor mounts, wheel round and balance, fork seals, shocks.... nothing is wrong. Is there anything else that may be causing this constant vibration..?
 

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ok....... if you read my original post.........this was in it. It vibrates from the moment you start it.

I have checked everything.... Motor mounts, wheel round and balance, fork seals, shocks.... nothing is wrong. Is there anything else that may be causing this constant vibration..?


Where does it say that you have checked the engine is running properly?
Have you done any tests to see that both cylinders are doing equal work?
 

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ok....... i do not know how to check those things...how is it done? Do I need to take it to a shop and have it checked...? Could it be the timing...?

Just trying to figure this out...thanks for your input...
 

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ok....... i do not know how to check those things...how is it done? Do I need to take it to a shop and have it checked...? Could it be the timing...?

Just trying to figure this out...thanks for your input...

I would start by simply spraying water on both headers while the engine is warming up from cold and watch that both steam off at the same time - at least that will tell you that both are firing.
More accurate would be an infrared thermometer but you need something that reads to at least 300C. That will let you know if both cylinders are running at similar temps.
If the bike has been sitting for any length of time there's a very good chance the carbs are gummed up. This would cause the cylinders to be getting differing amounts of fuel.
You can also spray carb cleaner at various places around each carburetor and listen to the engine note, if it changes then you have air leaks.
 

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I have a 1998 Aero VT1100C. I have been told that this engine is a single pin configuration. I know that it will vibrate....but man I can not ride more that 50 miles at speeds over 50. It makes my hands go numb, my feet and lower back hurt. I have checked everything.... Motor mounts, wheel round and balance, fork seals, shocks.... nothing is wrong. Is there anything else that may be causing this constant vibration..?

I really like this bike and do not want to sell it.... but if I can not minimize the vibration... it has to go.

ANY HELP WOULD BE GREATLY APPRECIATED.....UGH!
I'll try to help you out as I know your pain. Your bike does indeed have a single pin engine. The single pin was also used in the Shadow A.C.E, which is the bike that I have. It vibrates like a cheap motel bed.:thumbd: Comes right up thru the seat into my lower back. It's a pain to ride it. Your bike is a 98, if you could find a 2001 or 2002 Aero, you would be pleasantly surprised as the 01 and 02 models have a dual pin engine, the same that you'll find in the Shadow Spirit and the Shadow Sabre. There is probably nothing mechanically wrong with your bike, you just made the same mistake as I did.:clap: As far as fixing the vibration, if you find a solution, let me know.
 

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I have a 750 ACE, myself, and hate the single-pin crank vibration that Honda DELIBERATELY built into those motors to mimic the "Harley sound," and the lope of the HD single-pin crank. I've been looking for a different bike - because, no, there's no "fix" for it (unless there is just plain something wrong with your bike - and likely not - it's in the design itself).

If I've got this correctly,
1. All the ACEs are 1-pin, and the Aeros were too, up till 2002, when Honda changed the 1100 Aero back to a 2-pin, but,
2. The 750 Aeros are still all 1-pin, and so are the pre-2002 Aero 1100s.

This sucks, as I love everything else about my 750 ACE, esp the weight and styling. The newer 1100 Aeros now have the twin-pin crank - IF I want to get the bigger, heavier, newer, more expensive bike, and the Sabres is 2-pin, but without the "classic" styling I like.

So basically, yeah, we're both screwed on the bikes we have - there's nothing you can do to change that vibration save getting a different bike.
 
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