Twin Cooled cylinder differences?
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Road Captain
Joined: Jun 2008
Posts: 714
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Twin Cooled cylinder differences?
I have been told that Twin Cooled cylinders are different than air cooled
My 2016 Parts manuals say NOT at least in 2016
But are they different than the older 88/96 jugs other than the bore size?
I have a set of older ones I want to bore out for a 107 on my 16 Limited
Thanks
My 2016 Parts manuals say NOT at least in 2016
But are they different than the older 88/96 jugs other than the bore size?
I have a set of older ones I want to bore out for a 107 on my 16 Limited
Thanks
Road Captain
Joined: Mar 2006
Posts: 741
Likes: 11
From: West Central WI
Starting on 2012 models I started seeing cylinders with the extra material at the top machined surface where the twin cooled heads have open passageways. On the 13 models they were on every bagger I pulled down. If you attempt to use an older cylinder on a twin cooled engine you will have a massive coolant leak where there is no material to seal off the passages.
This is a pic of an older style cylinder, this one an S&S bu the same top surface, you can see where the material is not present for the water cooled gasket seal
In this pic you can see where the material is present on a twin cooled cylinder
This is a pic of an older style cylinder, this one an S&S bu the same top surface, you can see where the material is not present for the water cooled gasket seal
In this pic you can see where the material is present on a twin cooled cylinder
Last edited by BVBOB; Oct 31, 2016 at 08:51 PM.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
This is interesting! Doesn't explain why the parts websites show the same cylinder part number. Ii is possibly the latest cylinders will retrofit to older engines, but for the newer ones I would expect a different part number, to deal with the coolant issue.
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