Home/Fuel System
  • Out of stock
    Carb Rebuild Kit Carb Rebuild Kit Kit Contains: 8 Hole choke body Gasket, Float bowl Gasket 256, Float Valve assy. 2.0 with washer, Pilot Jet #27.5 VM22/210 type, #135 SmallRound Main Jet N102/221, Pilot air Screw and spring, Choke plunger and Washer for float bowl main jet access plug. Made in Japan - 1 kit required per carb.   Fits: XS650C/D (1976-77) The Slide needle shown in the photo is not included.   Part #48-1920 $13.95/Kit
  • Out of stock
    Carb Choke Plunger Carb Choke Plunger Fits: Stock Mikuni BS38 CV Carbs as used on 1972-75 XS2/TX650/TX650A/XS650B 650's.   Part #48-2002 $6.95 Ea
  • Out of stock
    Carb Choke Plunger Carb Choke Plunger - OEM Ref.# 603-14171-00. Fits: Stock Mikuni BS38 CV Carbs as used on 1970-71 XS1/XS1b 650's.   Part #48-2009 $3.50 Ea.
  • Carb Choke Body Gasket Carb Choke Body Gasket - 7 Hole. Fits: TX650A, XS650B (1974-75) Stock Mikuni BS38 CV Carb. Note: 1970-73 650's did not use a choke body gasket.   Part #48-2010 $1.90 Ea.
  • Carb Choke Body Gasket Carb Choke Body Gasket - 8 Hole. Fits: XS650C/D/E/F/2F/SF (1976-79) Stock Mikuni BS38 CV Carb. Note: 1970-73 650's did not use a choke body gasket.   Part #48-2011 $1.90 Ea.
  • Out of stock
    Carb Choke Plunger Carb Choke Plunger Fits: Stock Mikuni BS38 CV Carbs as used on 1976-79 XS650C/D/E/SE/F/2F/SF. Part #48-2012 $7.65 Ea.
  • Rubber Pilot Jet Passage Plug
    Rubber Pilot Jet Passage Plug (Pk/2). Used inside float bowl to seal passage to pilot Jet - 1 used per carb. Fits: XS650G/H/SH/SJ/SK/SL (1980-84) Stock Mikuni BS34 CV Carbs.   Part #48-5002 $3.90/Pk./2
  • Out of stock
    Fuel Idle Mixture Screw - (256 type). Fits: XS1/XS1b/XS2/TX650/TX650A/XS650B (1970-75) with Stock Mikuni BS38 CV Carbs.   Part #48-5008 $3.80 Ea.
  • Out of stock
    Fuel Idle Mixture Screw - (584 type). Fits: XS650C/D (1976-77) Stock Mikuni BS38 CV Carbs.   Part #48-5009 $3.80 Ea.
  • Out of stock
    Fuel Idle Mixture Screw with O-Ring. Fits: XS650E/SE/F/SF/2F(1978-79) Stock Mikuni BS38 CV Carbs. Note! Carb idle mixture screw O-Rings included may or may not fit correctly in your Mikuni BS38 CV stock carb. The O-Ring in the carb as originally supplied by Mikuni/Yamaha varies in fit and size and we have found it impossible to match or guarantee a proper fit. No alternatives can or will be supplied. The mixture screw and matching O-ring was never sold or supplied by Yamaha or Mikuni.   Part #48-5010 $4.90 Ea.
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    Fuel Idle Mixture Screw with Washer and O-Ring. Fits: XS650G/H/SH/SJ/SK/SL (1980-84) with Stock Mikuni BS34 CV Carbs. Note: This Mixture Screw is 25mm in length, there are 2 different sizes that were used. Be sure to measure your old one to confirm this is the size you require before purchasing See following 48-5012 text.   Part #48-5011 $6.95/Kit
  • Mixture Screw Kit - Mixture Screw, Mixture Screw Rubber O-Ring, Blind Plug Washer, Spring and Washer. (Includes All Contents Shown). Fits: 1980-84 XS650G/H/SH/SJ/SK/SL Stock Mikuni BS34 CV Carbs. Note: This Mixture Screw is 20.5mm in length, there are 2 different sizes that were used. Be sure to measure your old one to confirm this is the size you require before purchasing Plug covers vertical re-cessed idle mixture screw & keeps out contaminants. O-Ring fits under metal Washer at bottom of mixture screw hole and the engine will not idle properly if it is not present - (O-ring is often disintegrated). These parts are not shown in service & parts listings as Yamaha did not want "emissions" related parts accessed, however adjustments were often necessary to get New bikes to run properly. Suggested setting position of the normally hidden mixture screw is 2 1/2 to 3 turns out from bottom.   Part #48-5012 $7.95/Kit
  • Float Needle With Clip Float Needle With Clip - Viton Tipped Needle & Clip Only! Fits: XS650G-K 1980-84 Stock 34mm. Mikuni CV Carbs.   Part #48-5014 $3.95 Ea.
  • Carb Float Valve (Needle & Seat) arb Float Valve (Needle & Seat) - Threaded Type. Fits: XS2 (1972), TX650/A (1973-74), XS650B-F (1975-79) with Stock Mikuni BS38 CV Carbs.   Part #48-5019 $8.35 Ea.
  • O-Ring - Needle Jet (Nozzle Main). If this O-ring is dried out, shrunk or damaged, fuel can pass around the outside of the Needle jet instead of just thru the jets center causing a richer carb fuel mixture. Fits: XS/TX 650's (1970-79) with Stock Mikuni BS38 CV Carbs. Note: O-Ring appears too small but it is correct, install by carefully stretching with pointy needle nose pliers until it just fits over the jet.   Part #48-5020 $1.25 Ea.
  • Out of stock
    Throttle Butterfly Shaft Seal Throttle Butterfly Shaft Seal. Fits: Stock Mikuni BS34/BS38 CV Carbs on all 1970-84 650's.   Part #48-5021 $4.90/Pk./2
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