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Hey all, quick question about the Heiden Dyno Tune Needle & Jet Kit from Mikes/xs650direct.
In the kit there is a drill bit and instructions to drill out the slide vacuum port. What is the purpose of this?
Thanks!
CV Carbs - one of the best how-to manuals ive found for the original carbs
https://www.xs650.com/attachments/carbguide-pdf.248256/
VM Carbs - the same for mikuni roundslide carbs
https://www.xs650.com/attachments/vm34-36-pdf.248257/
Carb Basics - a quickie...