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Serial number question
  #1  
Old 09-17-2018, 09:28 AM
[email protected] [email protected] is offline
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Default Serial number question

I purchased a 1986 Vmax. The serial number tag on the bike and the tile are the same. The title says it's a 1986 and the tag on the goose neck shows a production date of 12/85. I was told that when I go to the dealer they are going to report that the serial number indicates it's a 2006. He said that Yamaha reused serial numbers. I ran the serial number through a decoder today and it indicates the serial number is 2016. Has there been this type of serial numbers on the early Vmax bikes?
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Re: Serial number question
  #2  
Old 09-17-2018, 09:30 AM
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Default Re: Serial number question

Also was wondering if there is a way other than serial number to positivley ID the bike as an 86?
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Re: Serial number question
  #3  
Old 09-17-2018, 10:01 AM
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Default Re: Serial number question

The full VIN # comprises of 17 digits.

The confusion may have arisen because since 1982 there has been a standard year identifier which is the 10th digit.
In your case a 1986 has the letter G as the year indicator.
The sequence started again in 2010 thus the letter G also applies to a 2016 machine.

A 2006 machine would have a year indicator of 6

As for re-using serial numbers it is correct that the numeric portion is not unique, but when combined with the rest of the digits would create a unique identification.

Foe more information have a look here
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Re: Serial number question
  #4  
Old 09-17-2018, 10:14 AM
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My VMax: 1986
Default Re: Serial number question

The serial number is JYA1UR00 7 GA000168
Thanks for your help
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Re: Serial number question
  #5  
Old 09-17-2018, 10:42 AM
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Default Re: Serial number question

In my experience, anything in the area of Sept. of the year (possibly even an earlier month) or later is probably going to be a next calendar year designated model. So Dec. 1985 manufacture is a 1986. I have a 1986 which is earlier in the year than yours and it is listed as a '86, not when it was made, 1985.

You can also look at the equipment to determine the year of manufacture, I think the header pipes and the VBoost I.D. is different on the 1985.
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Re: Serial number question
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Old 09-17-2018, 02:05 PM
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Default Re: Serial number question

Was there a low HP model in 1986. I was told that this was the 140 HP version but I do not hear the vboost noise when I turn the key on. Not equipped with vboot or not functioning?
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Re: Serial number question
  #7  
Old 09-19-2018, 08:12 AM
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Default Re: Serial number question

UPDATE I took the tank cover off as well as the left scoop. I re-seated the 3 wire connector and turned the key on. I guess I was thinking the sound made by the servo would be louder but I was able to hear it cycle when I turn the key on. So I guess it's working now all that is left is to go play above 6000 RPM. I'm looking forward to seeing what the Max will do above that range.
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