71XS1B Carbs Butterfly00 The throttle plate in the fully closed position. The idle port and starter (enrichner) ports are visible. The 1st bypass (
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 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 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 Butterfly00 The throttle plate in the fully closed position. The idle port and starter (enrichner) ports are visible. The 1st bypass (
71XS1B Butterfly Right02 Precise 38mm (1.496") bore in a tube. Fitted the Right throttle plate to check for irregularities. The light slivers at th
71XS1B Butterfly Right01 My right carb's throat appears squashed, less tall than 38mm (1.496"), and wider than 38mm, by about 0.003". I was able to
71XS1B Butterfly Left02 Bored a precise 38mm (1.496") bore in a tube. Fitted the Left throttle plate to check for irregularities. The light slivers
TwoManyXS1Bs

71XS1B Carbs Butterfly00 The throttle plate in the fully closed position. The idle port and starter (enrichner) ports are visible. The 1st bypass (

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1971 XS1B BS38 carburetor rebuild
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