New Harley Motor
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Road Captain
Joined: Oct 2012
Posts: 538
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From: Dallas
New Harley Motor
http://www.revzilla.com/common-tread...erName=VigLink
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If this has already been posted, please ignore
Don't kill the messenger
If this has already been posted, please ignore
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
It has been posted, but I don't recall where. Interesting that we may have a 'New Evo'. The old one was a V˛, I wonder what the new one will be called - how about ηV˛?!
Last edited by grbrown; Jul 28, 2016 at 09:27 AM.
Seasoned HDF Member
Joined: Oct 2012
Posts: 11,224
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From: St.Louis Mo.
this is exactly what i was thinking too! don't see how it could make much more power than a evo.
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Cruiser
Joined: Jan 2015
Posts: 155
Likes: 11
From: Newark DE
Not necessarily. The 4 valve head allows them to go to a pent roof combustion chamber as opposed to the hemispherical. Pent roof allows a lower chamber volume, as well as dual plugs. Combustion events can be shorter in duration as well as better controlled, leading to more complete burning and lower emissions.
