Engine Mechanical Topics Discussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.

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Old Feb 3, 2021 | 10:01 AM
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Angry Bill

I have a 2017 Harley Ultra limited with 24,000 on it since new and just heard from dealer that I need a top overhaul. Talking with the Harley service rep he asked what RPMs I was running the bike. Kind of telling me I wasn't getting the engine hot enough to burn off fuel causing a build up of carbon on the valves. I stated I couldn't remember off hand but that most of the miles were on long rides lasting from 7 to 8 hours on major highways. Just wondering if other M8 owners have experience anything as this.
 
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Old Feb 3, 2021 | 12:22 PM
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Ask them to show you the valve seats and guide seals. Could be that, certainly not unheard of in first year M8s
 

Last edited by Campy Roadie; Feb 3, 2021 at 12:27 PM.
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Old Feb 3, 2021 | 12:47 PM
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What are they symptoms, that lead to that diagnosis?
 
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Old Feb 3, 2021 | 01:01 PM
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Why was the bike in the dealership in the first place? Was it consuming oil? Have compression and leak down tests been run? Dig deeper before you dump a load of $$ on a top end rebuild. Like Nomad Max says, could be heads just need some work; if there is some carbon build up, there are ways to burn that off or it can be removed while the heads are being worked over.
 
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