Fuel System

Fuel System

The balance between air flow and fueling in an SR500 is delicate, and it doesn’t take much to upset it. But an SR500 carburetor rebuild kit, properly installed, can get your vintage Yamaha thumper back operating at peak level. To finish restoring your SR500 fuel system, install one of our petcock repair kits. They contain the diaphragm and all the O-rings and gaskets you need to restore the proper vacuum to your SR500 fuel flow. Mikes XS also stocks Mikuni carb tuning manuals and pocket tuners, so you can set your SR500 air-fuel mixture properly.

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  1. Fuel Petcock Repair Kit 1978 XS650 and more
    Part #
    20-0101
    Kit contains o rings and diaphragms to rebuild one fuel petcock. Does not include plastic diaphragm spacer block.Yamaha XS650 E 78XS360 C, D, 2D 76-77 XS400 D 77 SR500 E/F/G/H 78-81 SR500 82-84, 88, 91-93 XS500 E 78 XS750 D/2D/E/F 77-79 XS1100 E/F/G/H 78-81 
  2. Carb Repair Kit Yamaha SR500
    Part #
    41-4800
    Carburetor Repair Kit. SR500 
  3. Float Bowl Gasket Yamaha SR500
    Part #
    41-4820
    Float Bowl Gasket. SR500. Sold each. 
  4. Carb Holder Yamaha SR500 1978-1981 TT500 XT500
    Part #
    41-4850
    Carburetor Holder SR500 E/F/G/H 1978-81. Replace your worn and cracked carb holders. Includes one carb holder and one intake gasket.Also fits: TT500 C/D/E/F/G/H 1976-81, XS500 1976-81, XT500 C/D/E/F/G/H 1976-81 
  5. Mikuni Tuning Manual for motorcycle carburetors
    Part #
    35-0665
    Mikuni carburetor Tuning Manual from Sudco. 92 page manual includes exploded parts views, parts listings and optional parts. Guides you through tuning and trouble shooting for the popular lines of Mikuni carburetors. The definite reference for Mikuni carburetors and a must for the do-it-yourself type.For Mikuni Pocket... 
    • Out of stock
  6. Mikuni Pocket Tuner
    Part #
    48-8106
    Mikuni Pocket Tuner. A handy pocket-size calculator which can be used to determine required jetting changes in Mikuni carburetors due to climate and temperature changes. The Pocket Tuner is applicable to both single and multi-carb applications on two-stroke and four-stroke engines. It also has a guide for determining r... 
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