BMW K75 S | Replacing Vacuum Line to See if That Cures hesitation in Acceleration

I noticed that this 1988 BMW K75 S would hesitate under hard acceleration during the middle RPM range around 3-4500. It pulls strongly from idle up to 3k, and the above 5k, the bike would accelerate quickly all the way to redline. I didn't replace the vacuum lines when replacing the fuel lines, so going back to see if changing to new vacuum lines will help eliminate the flat spot. =========================== Merchandise =========================== ▶ Comprehensive Vehicle Maintenance Log Book: https://amzn.to/3wc2EMl =========================== Social Media Links: =========================== ▶ Facebook:   / kintsugimoto   ▶ Instagram:   / kintsugimoto   ▶ Email List: https://kintsugimoto.ck.page/47f50ba6fa =========================== TIMESTAMPS =========================== 00:00 Introduction 00:30 BMW K75 S removing airbox to get access to the fuel regulator 01:09 BMW K75 S installing vacuum line to the fuel regulator 02:20 BMW K75 S reinstalling airbox 02:30 BMW K75 S checking vacuum caps on each intake 03:15 BMW K75 S check ride to see if the flat spot between 3-4500 RPMs #bmwk75 #classicmotorcycles #wrenching