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Keyster Premium 'Nencho' Carb Kit XS1/XS1B - Left Carb

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The ultimate carb rebuild kit from Keyster.  For Yamaha XS1/XS1B.  This is the kit for the LEFT carb ONLY...  Please buy the related RIGHT carb kit to rebuild a pair of carbs.

These kits contain parts not normally available - and help solve rough running issues related to these XS1 carbs.

Included in the kit are:

  • 4 x different Jet Needles - Lean, Standard (4JN19), Rich, Richer
  • Needle Jet
  • 4 x Needle Circlips
  • 6 x different main jets - 124, 126, 130, 133, 138 and 142
  • 3 x different pilot jets - 40, 42.5, 49
  • Choke/Starter Plunger, Choke/Starter Plunger Spring
  • Choke/Starter and Float Bowl Gasket
  • Float Needle Valve Assembly with fiber washer
  • Air Screw, O-Ring and Air Screw Spring

View Technical Documentation