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What has HD done with the engine?

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Old Mar 11, 2017 | 12:48 AM
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Default What has HD done with the engine?

I just noticed while drooling over the Road King Special blacked out that they have redesigned something until now I have overlooked. In the past with bikes one of the mods I have made was to install finned head bolt covers to lose the gap in the engine around the plugs. But looking more closely at the 107 I see they have addressed the issue, at least to some degree. Just wondering why they would eliminate a potential after the fact sale. See if you agree and I will enclose a picture of the covers of one of my bikes for comparison.

Yikes!!! Just ordered a can of S100 engine brightener for the other bike but looks like this one needs it as well after taking the picture. Oh well, someone suggested a can of silicone spray from Wally world does the same much cheaper so guess I will find out. Jeez, and I thought the bike was pretty clean. So much for attention to detail...

http://www.bing.com/images/search?vi...x=0&ajaxhist=0


 
Attached Thumbnails What has HD done with the engine?-head-bolt-cover.jpg  
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Old Mar 11, 2017 | 12:55 AM
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http://www.harley-davidson.com/en_US...ree-sixty.html

Based on this image, my guess is that that piece was installed by the dealership before the sale, perhaps before they put it on the floor.
 
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Old Mar 11, 2017 | 12:57 AM
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I've seen those add ons somewhere.
 

Last edited by ChickinOnaChain; Mar 11, 2017 at 01:05 PM.
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Old Mar 11, 2017 | 04:55 AM
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Leaving a place for some trinket doodad is not high on the priority list when you are designing a completely new engine that has as many constraints as a new Harley engine does.

Either that or you have been in the dark about the Milwaukee 8 which has replaced the twin cam in the 2017 touring bikes and will likely be the only big twin engine in 2018, in a similar manner that the Evo was replaced by the twin cam.
 
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Old Mar 11, 2017 | 06:05 AM
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The LAST thing I would ever put on one of my bikes is a cover, doo dad or anything that would trap heat; especially on the cylinder heads.
 
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Old Mar 11, 2017 | 06:53 AM
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At first I thought that was stealth coils but if it was then the plug wires would not be visible
 
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Old Mar 11, 2017 | 07:45 AM
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Originally Posted by Nomadmax
The LAST thing I would ever put on one of my bikes is a cover, doo dad or anything that would trap heat; especially on the cylinder heads.
In this case I would believe that the more fins you have equal more heat dissipation!
 
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Old Mar 11, 2017 | 07:50 AM
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Originally Posted by Nomadmax
The LAST thing I would ever put on one of my bikes is a cover, doo dad or anything that would trap heat; especially on the cylinder heads.
These finned covers take up such little space compared to the whole jug that you're talking about a very inconsequential amount. Not to mention that they would actually absorb and transfer heat out through their fins to be carried away so it's really a moot point you're trying to make.

...spider posted when I was typing.
 
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Old Mar 11, 2017 | 08:42 AM
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Originally Posted by SpiderPig
In this case I would believe that the more fins you have equal more heat dissipation!
If the fins there are metal and welded to the heads, then yes. But a plastic cover with fins will just trap heat.
 
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Old Mar 11, 2017 | 09:01 AM
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HD has finned spark plug covers for the M8.

http://www.harley-davidson.com/store...04-25800062--1
 
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