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Confused what my bike is

Discussion in 'XJ Technical Chat' started by John1991, Jan 21, 2018.

  1. John1991

    John1991 Member

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    hello all, new member here. I’ve searched my heart out to no avail on this one. I recently purchased a 1981 Yamaha Maxim 550. Well that’s what the vin tells me. But the bike has a Seca tail section and is shaft drive. I’ve noticed everyone says they were all chain drive. Any input here? I’d upload a pic but not sure how to unfortunately. Any help would be great
     
    John1991, Jan 21, 2018
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  2. John1991

    John1991 Member

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    Oh and it also has the square headlight and “Atari” looking gauge cluster if that helps at all
     
    John1991, Jan 22, 2018
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  3. a100man

    a100man Well-Known Member

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    if it's shaft drive then its a 650 or bigger. I'm no expert but I think 'Ataris' are a feature of the 750 model - there should also be a cc mark cast into the barrels at the front.
     
    a100man, Jan 22, 2018
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  4. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    From your description, you have a Seca 750.

    Does the VIN on the title match the VIN on the steering neck?
     
    k-moe, Jan 22, 2018
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  5. John1991

    John1991 Member

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    Yes vin matched, I even ran the shorty vin to confirm the 17 digit vin. Motor and frame have same stamping. It comes up with an 1981 XJ550 Maxim. The 9 digit shorty number is 5g2-004470. And i used the decoder on here to verify the 17 digit. This is why I’ve gotten confused to what my bike is lol bikes also from Vermont so no title up here
     
    John1991, Jan 22, 2018
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  6. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    If you used an online tool or database, it may be the problem. I know that one of the threads linking to a VIN decoding database was removed from public view because it was returning bad results for some models.
    Use this instead http://www.xjbikes.com/forums/threads/tech-topic-model-id-and-vins.14577/

    5G2 is a 1981 XJ 750 Seca.
     
    Last edited: Jan 22, 2018
    k-moe, Jan 22, 2018
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  7. John1991

    John1991 Member

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    It was the link everyone recommended on here. It gave me the full vin and all. But I registered it with the full 17 digit vin. I verified by the barrel casting it is indeed a 750. So if it gave me the same 17 digit vin, does that mean it just gave me the wrong model Information?
     
    John1991, Jan 22, 2018
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  8. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    5g2- 750 Seca
     
    hogfiddles, Jan 22, 2018
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  9. John1991

    John1991 Member

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    Yea I verified that, I do appreciate all the replies guys. This forum is great. But my question now is why did the vin decoder say it was an 81 550 maxim? Has anyone else had that issue with it? I mean it gave me the proper 17 digit vin for the bike
     
    John1991, Jan 22, 2018
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  10. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    Seems i recall something a little while back that people said not to use it til it got fixed. May be it was a valve shim program instead...but something seems to be triggering a faint memory back in the fog.
     
    hogfiddles, Jan 22, 2018
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  11. John1991

    John1991 Member

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    Just weird it came up the same vin but different model bike lol year was correct and all. But I’m glad I got it figured out to what it is. I appreciate all the help out here on the forum. Great group of people
     
    John1991, Jan 22, 2018
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  12. John1991

    John1991 Member

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    Just for a reference and security reasoning can anyone translate my shorty vin for me to the actual 17 digit vin? So I can double check. I got confused and lost in the whole article write up on how to do it. The middle part of my vin tag is actually worn off from the cables. So I went with what the guy registered it as last. So I only have JYA then blank and then BA004470. I think that website might be broken because it gave me a 5k5003 for my 17 digit vin
     
    John1991, Jan 22, 2018
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  13. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    The short VIN is also stamped on the steering head, on the right side (and on the engine case). I linked the article with the guide on how to derive the long VIN.

    Unfortunately I'm not in a cognitive state to check you work, otherwise I'd do that for you.
    Mondays suck.
     
    k-moe, Jan 22, 2018
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  14. John1991

    John1991 Member

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    Yes I used the shorty vin to get my 17 digit vin on the decoder site that everyone recommends on the forum. Just weird it came up for an 81 550 maxim. I just got confused in all the reading on how to decipher it
     
    John1991, Jan 22, 2018
    #14
  15. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    ...and Tuesdays---- and Wednesdays---and.......
     
    hogfiddles, Jan 22, 2018
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  16. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Well, I was observed today at 8:20 a.m. (surprise!!), so Tuesday will probably be better.
     
    k-moe, Jan 22, 2018
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  17. John1991

    John1991 Member

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    I did all the math and got the check number. The vin it comes up with isn’t coming up as proper when I try to search it. And the decoder http://www.dissingermoto.com/ keeps giving me it as an 81 550 maxim. To my knowledge I haven’t done the math wrong and haven’t entered the shorty vin wrong.
     
    John1991, Jan 22, 2018
    #17
  18. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    At least that one is over---
     
    hogfiddles, Jan 22, 2018
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    k-moe likes this.
  19. XJ550H

    XJ550H Well-Known Member Premium Member

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    5G200 = 1981 XJ750 Seca USA

    Your Full VIN Numer is JYA5G2003BA00447


    550 maxim is 5k5 in the vin
     
    XJ550H, Jan 22, 2018
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  20. John1991

    John1991 Member

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    Thank you for that, any clue why that decoder website gave me the 550 vin?
     
    John1991, Jan 22, 2018
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  21. MattiThundrrr

    MattiThundrrr Not a guru

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    Glitch in the matrix. The program is flawed. Trust the geniuses. Genii? Whatever.
     
    MattiThundrrr, Jan 23, 2018
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  22. XJ550H

    XJ550H Well-Known Member Premium Member

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    could be browser , some times when i run more than 1 number i have to close and reopen the page i use chrome
     
    XJ550H, Jan 23, 2018
    #22

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