• Topics: 38
  • Replies: 457
Nov 30, 2017
North UK

If 1 needle has 3 grooves –> the other one must be in equal height.  (could be also 4 or 3rd slot)  ,

either way a digital caliper can measure the needle height (AFTER) both are fitted on the black piston slides.  you want both carbs equal in all cases.

middle of 3 grooves is factory. on a factory 3 groove needle.

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