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Changing my rear to an 18"

Discussion in 'XJ Modifications' started by 1904xj, Jul 11, 2010.

  1. 1904xj

    1904xj Member

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    Does anyone know if a Seca rear wheel would fit my 1981 xj650?
    I want to upgrade to an 18 in. rear.
     
    1904xj, Jul 11, 2010
    #1
  2. iwingameover

    iwingameover Active Member

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    Yes it fits but it's narrower.
     
    iwingameover, Jul 11, 2010
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  3. 1904xj

    1904xj Member

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    Is there a thicker one that would fit or is that really my only bet?
    Didn't some of the Maxims come with an 18?
     
    1904xj, Jul 11, 2010
    #3
  4. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    You can have a custom wide rear rim - (hang on)

    Buy a Virago spoke rear rim, brake, and final drive.
    Buy a brand new wide rim and stainless spokes from a Harley catalog.
    Get someone who really knows what they are doing to lace it up "dished", so you have more driveshaft clearance.
    Mount that 170 rear tire with confidence.
    Get a front spoke rim to match. Sounds like about $500 !! :eek:
     
    TIMEtoRIDE, Jul 11, 2010
    #4
  5. 1904xj

    1904xj Member

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    Thats great info Id take spokes over mags any day. Love a vintage look!
    Thanks.
     
    1904xj, Jul 12, 2010
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  6. kevineleven

    kevineleven Member

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    Youre not gonna get a 170 on there. It will not clear the shaft.
     
    kevineleven, Jul 12, 2010
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  7. KrystyonWayne24

    KrystyonWayne24 Member

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    If you remove the cover that is over the drive shaft what size can you get on it??
     
    KrystyonWayne24, Jul 12, 2010
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  8. iwingameover

    iwingameover Active Member

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    That cover is the swingarm. You'd have to hard tail it to get it off of there.

    Plumber did it. but I do not know how wide of a tire that would allow.
     
    iwingameover, Jul 13, 2010
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  9. PainterD

    PainterD Active Member

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    I mounted a 130 on the 18" Seca rear wheel and there's enough room for a 140. My Maxim 16" wheel has a 140 on it and there's still room for a larger (fatter) tire.
     
    PainterD, Jul 13, 2010
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  10. padre

    padre Member

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    I've read that if you take an angle grinder to the inboard side of the swingarm tube (with the driveshaft removed) you can open it up and put a 150 on it.
    I've got a 750 seca with an 18" with a Bridestone spitfire 130/80 on it, its only got 2000 (1100 highway Vegas-Oklahoma, 900 street) miles on it (I bought it in April). Wanna trade? It looks like new. Just send me a personal message here. I want lower gear ratios. A smaller wheel will do the trick.
     
    padre, Jul 13, 2010
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  11. 1904xj

    1904xj Member

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    I actually decided to keep my 16 rear. I went out yesterday and bought new tires to put on my bike. Thanks for the offer though.
     
    1904xj, Jul 13, 2010
    #11
  12. padre

    padre Member

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    aw nuts, my son is in chula vista now on vacation and he has a truck. Oh well, the 18 would give you a 10% higher 5th gear, I wanted the 16 for more low end, the nearby dragstrip is only an 1/8th mile and I never ride over 100 mph anyway. Good luck on your bike.
     
    padre, Jul 14, 2010
    #12

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