XS1B Carbs FuelLevel06 The total capacity of the float bowl is 69cc. 69cc - 41cc = 28cc That 28cc divided by the 11mm level means that each 1mm dif

XS1B Carbs FuelLevel06 The total capacity of the float bowl is 69cc. 69cc - 41cc = 28cc That 28cc divided by the 11mm level means that each 1mm dif

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XS1B Carbs FuelLevel05 The amount of fuel in the bowl is 41cc.

XS1B Carbs FuelLevel05 The amount of fuel in the bowl is 41cc.

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XS1B Carbs FuelLevel04 The fuel level is 11mm below the bowl's top edge.

XS1B Carbs FuelLevel04 The fuel level is 11mm below the bowl's top edge.

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XS1B Carbs FuelLevel03 When removed, the fuel in the float bowl is lower since the floats aren't in there.

XS1B Carbs FuelLevel03 When removed, the fuel in the float bowl is lower since the floats aren't in there.

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XS1B Carbs FuelLevel02 Floats set at book value of 25mm. Clear tube test shows 2mm below carb body lip. The gasket base (reference surface) is 1.5m

XS1B Carbs FuelLevel02 Floats set at book value of 25mm. Clear tube test shows 2mm below carb body lip. The gasket base (reference surface) is 1.5m

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XS1B Carbs FuelLevel01 Float testing unladen (no valve pressure) 30mm diameter floats. 13mm above the surface, 17mm submerged.

XS1B Carbs FuelLevel01 Float testing unladen (no valve pressure) 30mm diameter floats. 13mm above the surface, 17mm submerged.

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71XS1B Carbs Overflow05 The vertical splits are soldered as far down as possible. Then the tubes are coated in epoxy and slid down onto the overflow

71XS1B Carbs Overflow05 The vertical splits are soldered as far down as possible. Then the tubes are coated in epoxy and slid down onto the overflow

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71XS1B Carbs Overflow04 The overflow tubes are 3mm OD. Hobby brass tubing of 5/32" OD, 1/8" ID, 0.4" (10mm) long. These sleeves will repair the ove

71XS1B Carbs Overflow04 The overflow tubes are 3mm OD. Hobby brass tubing of 5/32" OD, 1/8" ID, 0.4" (10mm) long. These sleeves will repair the ove

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71XS1B Carbs Overflow03 It gets worse. Not only were bubbles emerging from the base of the overflow tubes, but from vertical splits as well.

71XS1B Carbs Overflow03 It gets worse. Not only were bubbles emerging from the base of the overflow tubes, but from vertical splits as well.

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71XS1B Carbs Overflow02 Put water in the bowl, cover the top of the overflow tube. Blow into the hose, watch for bubbles.

71XS1B Carbs Overflow02 Put water in the bowl, cover the top of the overflow tube. Blow into the hose, watch for bubbles.

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71XS1B Carbs Overflow01 Attach a hose to the bowl's overflow barb.

71XS1B Carbs Overflow01 Attach a hose to the bowl's overflow barb.

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71XS1B ThrottleCables Wanted to install new cables, but there's too many problems with the replacements. Wrong core diameter, solder wicked too far

71XS1B ThrottleCables Wanted to install new cables, but there's too many problems with the replacements. Wrong core diameter, solder wicked too far

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71 BS38 ChokePlunger07 The new plugs MUST be trimmed to near flush with the crimped end of the plunger. Failure to do this will prevent the plunger

71 BS38 ChokePlunger07 The new plugs MUST be trimmed to near flush with the crimped end of the plunger. Failure to do this will prevent the plunger

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71 BS38 ChokePlunger06 Punch out some 0.275" (7mm) diameter plugs from 1/8" (3mm) fuel resistant neoprene. Put a tiny drop of superglue in the plung

71 BS38 ChokePlunger06 Punch out some 0.275" (7mm) diameter plugs from 1/8" (3mm) fuel resistant neoprene. Put a tiny drop of superglue in the plung

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71 BS38 ChokePlunger05 Rubber tip of starter plunger can be pried out from the crimped end.

71 BS38 ChokePlunger05 Rubber tip of starter plunger can be pried out from the crimped end.

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71 BS38 ChokePlunger04 Punch out some 1/4" discs of #240 wet-or-dry sandpaper. Super glue one to the squared-off end of a 5/16" shaft. Sand the sta

71 BS38 ChokePlunger04 Punch out some 1/4" discs of #240 wet-or-dry sandpaper. Super glue one to the squared-off end of a 5/16" shaft. Sand the sta

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71 BS38 ChokePlunger03 Another view of starter plunger seat. Viewed through outlet port.

71 BS38 ChokePlunger03 Another view of starter plunger seat. Viewed through outlet port.

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71 BS38 ChokePlunger02 Starter fuel inlet, plunger seat. 44 years of corrosion.

71 BS38 ChokePlunger02 Starter fuel inlet, plunger seat. 44 years of corrosion.

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71 BS38 ChokePlunger01 44 year old, worn, deformed, cracked starter (choke, enrichner) plunger tip. Left carb starter plungers are not available, so

71 BS38 ChokePlunger01 44 year old, worn, deformed, cracked starter (choke, enrichner) plunger tip. Left carb starter plungers are not available, so

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71XS1B Carbs AirJets The air jet (air bleed) diameters for this specific "E3" carburetor. Air jets MUST be cleaned to their documented diameters.

71XS1B Carbs AirJets The air jet (air bleed) diameters for this specific "E3" carburetor. Air jets MUST be cleaned to their documented diameters.

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71XS1B Carbs Butterfly04 The idle stop screw is a full turn from fully closed. The 1st bypass (progressive, transition) port will now be delivering

71XS1B Carbs Butterfly04 The idle stop screw is a full turn from fully closed. The 1st bypass (progressive, transition) port will now be delivering

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71XS1B Carbs Butterfly03 The idle stop screw is 3/4 turn from fully closed. The 1st bypass (progressive, transition) port is in play, and will be de

71XS1B Carbs Butterfly03 The idle stop screw is 3/4 turn from fully closed. The 1st bypass (progressive, transition) port is in play, and will be de

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71XS1B Carbs Butterfly02 The idle stop screw is 1/2 turn from fully closed. The 1st bypass (progressive, transition) port edge is now in view, and w

71XS1B Carbs Butterfly02 The idle stop screw is 1/2 turn from fully closed. The 1st bypass (progressive, transition) port edge is now in view, and w

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71XS1B Carbs Butterfly01 The idle stop screw is 1/4 turn from fully closed. The 1st bypass (progressive, transition) port edge is just barely visibl

71XS1B Carbs Butterfly01 The idle stop screw is 1/4 turn from fully closed. The 1st bypass (progressive, transition) port edge is just barely visibl

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TwoManyXS1Bs

1971 XS1B BS38 carburetor rebuild

With tips and tricks

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