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Shim exchange?? I have 280 Need 285..

Discussion in 'XJ Technical Chat' started by Robert Powell, Sep 12, 2017.

  1. Robert Powell

    Robert Powell New Member

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    Hey all, I know you all do some sort of shim exchange and was wondering if anyone wanted to trade my 280 for a 285?? Thanks, Bob.. 1982 Seca 750.
     
    Robert Powell, Sep 12, 2017
    #1
  2. Jetfixer

    Jetfixer Well-Known Member

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    That is hogfiddles... or your local yamaha dealer should have them ...mine had them for 9$ each I needed 3 when I did mine
     
    Jetfixer, Sep 12, 2017
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  3. Robert Powell

    Robert Powell New Member

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    Thanks Jetfixer!!!!!
     
    Robert Powell, Sep 12, 2017
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  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    what was the clearance on that shim? intake or exhaust?
    it is typical for valves to get tighter requiring thinner shims not thicker ones. just asking.
    intake
    intake.PNG

    exhaust
    exhaust.PNG
     
    XJ550H, Sep 13, 2017
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    TheCrazyGnat likes this.
  5. Robert Powell

    Robert Powell New Member

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    Number 3 intake was .18mm....
     
    Robert Powell, Sep 13, 2017
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    XJ550H likes this.
  6. Paul Howells

    Paul Howells Active Member

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    I couldn't get any shims from the Yamaha dealers in my area but the BMW shop literally had buckets of them.
     
    Paul Howells, Sep 13, 2017
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  7. XJ550H

    XJ550H Well-Known Member Premium Member

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    i like the bmw shims the shims come in 1/4 sizes unlike the yamaha shims in 1/2 sizes
     
    XJ550H, Sep 13, 2017
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  8. hogfiddles

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

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    Except you don't need "1/2 sizes" and "1/4 sizes". In-spec is in-spec.
     
    hogfiddles, Sep 14, 2017
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  9. Paul Howells

    Paul Howells Active Member

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    I knew you were going to say that!
     
    Paul Howells, Sep 14, 2017
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  10. XJ550H

    XJ550H Well-Known Member Premium Member

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    I use them to even out the clearances I like to keep them all close as possible to the same clearance as well as keeping them all as "loose" as I can.
    in my opinion because of the way the spec is stated I belive Yamaha was trying for intake at 0.15 mm and exhaust at 0.20 mm as Ideal.

    but i do agree spec is spec. in spec go ride
     
    XJ550H, Sep 15, 2017
    #10

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