Mikuni BST-34 - Carburettor for SR500

The SR500 had three different OEM carburettors during its years of construction.

The MIKUNI VM34SS-2J4 was installed in the '2J4', the SR500 of the 1978-1983 model years. From 1984 to approx. 1990, the MIKUNI VM34SS-48T was fitted in the '48T'. A characteristic feature of these carburettors is the choke lever, which is pressed downwards for operation.

The '48T' of the 1990/1991-1999 model years was supplied with the MIKUNI BST-34. This has a round choke button which is pulled to operate it.

On this page we have summarised all available spare parts for the BST-34 carburettor.
Mikuni BST-34 Carburettor
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  1. Product SKU:
    A1825

    Main Jet #182.5
    Usage:
    BST34/TM/TDMR Flat Slide Carburettors
    €4.50
    Incl. 19% VAT,excl. Shipping Cost
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  2. Product SKU:
    A1850

    Main Jet #185
    Usage:
    BST34/TM/TDMR FS-Carburettor
    €4.50
    Incl. 19% VAT,excl. Shipping Cost
    Add to Wish List
  3. Product SKU:
    27083

    O-Ring (Bottom) BST34 Carburettor Air-Cut Valve Cap (see Item 29122), OEM reference # 558-14147-00
    Usage:
    SR500'90- (BST34 Carburettor)
    €4.97
    Incl. 19% VAT,excl. Shipping Cost
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  4. Product SKU:
    27082

    O-Ring (top) BST34 Carburettor Air-Cut Valve Lid (see Item 29122), Throttle Valve BST34
    Usage:
    SR500'90- (BST34 Carburettor)
    €2.63
    Incl. 19% VAT,excl. Shipping Cost
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  5. Product SKU:
    30132

    O-Ring for Mixture Adjustment Screw
    Usage:
    SR500'90- (BST34 Carb.), Mikuni TM36/TM40, XTZ750, TDM850-'98, TRX850 (BDST38 Carb.), TDM850'99- (BDSR38 Carb.)
    €3.50
    Incl. 19% VAT,excl. Shipping Cost
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  6. Product SKU:
    29154

    O-Ring for Seat of Floater Needle Valve, 1 Piece (suitable for e.g. OEM 1UY-14107-25 and 48U-14107-28)
    Usage:
    SR500-'89, SR500'90- (Mikuni BST34 Carb.), TDM850'99- (BDSR38 Carb.), SV650/S, TM36
    €1.40
    Incl. 19% VAT,excl. Shipping Cost
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  7. Product SKU:
    28147

    O-Ring for Throttle Valve Guide (Required 2x)
    Usage:
    SR500'90- (with Mikuni BST34 Carburettor)
    €0.95
    Incl. 19% VAT,excl. Shipping Cost
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  8. Product SKU:
    30606

    Pilot Jet #37.5
    Usage:
    SR500'90- (with Mikuni BST34 Carburettor), XTZ750
    €7.50
    Incl. 19% VAT,excl. Shipping Cost
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  9. Product SKU:
    30603

    Pilot Jet #40
    Usage:
    SR500'90- (with Mikuni BST34 Carburettor), XTZ750
    €7.50
    Incl. 19% VAT,excl. Shipping Cost
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  10. Product SKU:
    27313

    Pilot Jet #42.5
    Usage:
    SR500'90- (with Mikuni BST34 Carburettor), XTZ750
    €7.50
    Incl. 19% VAT,excl. Shipping Cost
    Add to Wish List
  11. Product SKU:
    28099

    Pilot Jet #45 (OEM)
    Usage:
    SR500'90- (with Mikuni BST34 Carburettor), XTZ750
    €7.50
    Incl. 19% VAT,excl. Shipping Cost
    Add to Wish List
  12. Product SKU:
    28096

    Pilot Jet #47.5
    Usage:
    SR500'90- (with Mikuni BST34 Carburettor), XTZ750
    €7.50
    Incl. 19% VAT,excl. Shipping Cost
    Add to Wish List
  13. Product SKU:
    28095

    Pilot Jet #50
    Usage:
    SR500'90- (with Mikuni BST34 Carburettor), XTZ750
    €7.50
    Incl. 19% VAT,excl. Shipping Cost
    Add to Wish List
  14. Product SKU:
    28249

    Pilot Jet #52.5
    Usage:
    SR500'90- (with Mikuni BST34 Carburettor), XTZ750
    €7.50
    Incl. 19% VAT,excl. Shipping Cost
    Add to Wish List
  15. Product SKU:
    28252

    Pilot Jet #55
    Usage:
    SR500'90- (with Mikuni BST34 Carburettor), XTZ750
    €7.50
    Incl. 19% VAT,excl. Shipping Cost
    Add to Wish List
  16. Product SKU:
    28270

    Pin, Floater, fits VM34SS and BST34 Carburettor
    Usage:
    SR500'78-'89, SR500'90-
    €5.76
    Incl. 19% VAT,excl. Shipping Cost
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  17. Product SKU:
    30131

    Spring for Mixture Adjustment Screw
    Usage:
    TM36/TM40-Carburettor, SR500'90-(BST34-Carburettor), XTZ750(BDST38-Carburettor)
    €2.60
    Incl. 19% VAT,excl. Shipping Cost
    Add to Wish List
  18. Product SKU:
    28151

    Spring for Throttle Valve
    Usage:
    SR500'90- (with Mikuni BST34 Carburettor)
    €7.82
    Incl. 19% VAT,excl. Shipping Cost
    Add to Wish List
  19. Product SKU:
    27004

    Spring, Air-Cut lid, BST34 carburetor
    Usage:
    SR500'90-
    €4.50
    Incl. 19% VAT,excl. Shipping Cost
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  20. Product SKU:
    30026

    Throttle Cable (Opener, OEM)
    Usage:
    SR500T'91- from Frame# 48T-030101 and up (Narrow Handlebar, Flatslide Carburettor BST34)
    €63.07
    Incl. 19% VAT,excl. Shipping Cost
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  21. Product SKU:
    30327

    Throttle Cable A (Opener)
    Usage:
    SR500T'91- from Frame# 48T-030101 and up (Narrow Handlebar, Flatslide Carburettor BST34)
    €14.50
    Incl. 19% VAT,excl. Shipping Cost
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