I have a 2019 Road Glide ultra. It currently has the 117 stage IV upgrade and everything except the exhaust has been done by Harley with Harley parts. I am at 11000 miles and I still have a bad noise on any hard acceleration. I worked on cars for years and if I had to relate it I would say it detonation noise from not tuned correctly. The dealer says this is normal. I have the extended warranty. Has anyone else experienced this sort of noise with the M8?
simpkins1999
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