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Yamaha XS650 BS34 38 CV Mikuni Carb Slides, Carb Top Parts and Throttle Butterfly Parts

When the diaphragm on a Yamaha XS650 carburetor slid deteriorates, performance issues quickly follow. Unfortunately, replacement is the only solution. Mikes XS carries XS650 carb slide and diaphragm assemblies for Mikuni BS34 and BS38 carbs to cure this uncommon problem. We also offer hard-to-find XS650 carb replacement parts like the Mikuni BS34 butterfly shaft seal, carb lid screws, slide needle preload springs, float needles and Dyno Kit performance jet needles. 

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  1. Throttle Butterfly Shaft Seal Mikuni BS34 and BS38 CV carbs all XS650
    Part #
    48-5021
    Throttle Butterfly Shaft Seal - Pk/2 Fits: Stock Mikuni BS34/BS38 CV Carburetors on all 1970-84 650's. 
  2. Carb Slide & Diaphragm Assembly 1970-77 Mikuni BS38 CV carburetors
    Part #
    20-6029
    Carb Slide & Diaphragm Assembly. - Fits: Mikuni BS38 CV Carbs as used on 1970-77 XS650 TX 650's OEM Ref.# 256-14940-00 - Mikuni GenuineAlso fits: XS500 C/D 76-77, TX650 73-74 
  3. Carb Slide & Diaphragm Assembly 1980-84 Mikuni BS34 CV carburetors
    Part #
    20-6028
    Carb Slide & Diaphragm Assembly. - Fits: Mikuni BS34 CV Carbs as used on 1980-84 XS650's OEM Ref.# 3F7/3H5-14940 - Mikuni GenuineAlso fits: SR250 Exciter 80-82, XS400 SE 82, XS400 G 80, XS400 H 81, XS400 SH/SJ 81-82, XS400 J 82, XS400 K Maxim 83, XJ900 RK Seca 83, XJ1100 Maxim 82, XS1100 G/H/LG/LG/SG/SH 80-81 
  4. Screws - 5mm. Mikuni BS38 CV carb lid
    Part #
    48-0991
    Screws - 5mm.- Early Mikuni BS38 CV carb Lid Screws with lockwashers and Late 34mm CV Bowl Screw Pk./4 
  5. Throttle Shaft Screws Mikuni BS34 and BS38 CV carbs
    Part #
    48-5022
    Throttle Butterfly Shaft Screws (Pk./4)Fits: Stock Mikuni BS34/BS38 CV Carbs. All OEM XS1/XS2/XS650/TX650 carbs XS400 
  6. Screws - 5mm. Mikuni CV carb lid
    Part #
    48-0992
    Screws - 5mm.(no lock washers) Late Mikuni CV carb Lid Screw - Pk./4 
  7. Slide Needle Clip Mikuni BS34 BS38 carbs
    Part #
    48-0668
    Carb Slide Needle Clip (pk./2) - Fits: Slide Needles on 1974-84 650's with stock Mikuni BS34/38 CV Carbs. 
  8. Slide Needle Preload Spring Mikuni BS34 CV
    Part #
    48-0669
    Spring - Slide needle preload spring for stock BS34 CV Mikuni carbs as used on 1980-84 North American model XS650's. OEM Ref.# 3F7-14589-00-00This spring holds the slide needle down in place in the carb slide. 
  9. Jet Needle - Dyno Kit
    Part #
    48-0664
    Jet Needle - Dyno Kit 
  10. Jet Needle Washer Mikuni BS34 CV
    Part #
    48-0770
    Slide Needle WasherWasher - Fits under slide needle preload spring and on top of needle & clip on stock BS34 CV Mikuni carbs as used on 1980-84 North American model XS650's. 
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