Heat
Elite HDF Member
Joined: Sep 2008
Posts: 4,440
Likes: 148
From: Northwest
Depends on how long it was at 260... I doubt that the temp by itself is going to cause a problem other than decrease the life of the oil.
At 300 miles, you're likely to use a little oil as the rings may not have 'sealed' or matched themselves to the cylinder walls yet.
http://www.harley-performance.com/ha...brication.html
At 300 miles, you're likely to use a little oil as the rings may not have 'sealed' or matched themselves to the cylinder walls yet.
http://www.harley-performance.com/ha...brication.html
Outstanding HDF Member
Joined: May 2014
Posts: 3,410
Likes: 143
From: Palm Desert,CA
Probably not a legitimate answer to your question but...
I ride regularly in temps way beyond 90 (heck it was 91 at 5am here this morning). I've been living in this area for the last two years and my head temps as measured by my Powervision regularly hit 300, not sure how that translates into oil temps. I do have oil cooler and fans.
At any rate, when I disassembled my engine to put new cylinders and pistons on, I had no glazing whatsoever.
I ride regularly in temps way beyond 90 (heck it was 91 at 5am here this morning). I've been living in this area for the last two years and my head temps as measured by my Powervision regularly hit 300, not sure how that translates into oil temps. I do have oil cooler and fans.
At any rate, when I disassembled my engine to put new cylinders and pistons on, I had no glazing whatsoever.
Road Warrior
Joined: Nov 2010
Posts: 1,251
Likes: 30
From: Ashburn, VA
Just put Mobil 1 20w-50 Synthetic in it already and quit worrying. I have had my bike since new 2010 and swapped to synthetic at 30 miles and it still runs great today. All I did to break it in was a couple hard WOT runs and let it engine break to seal the rings.
Elite HDF Member
Joined: Sep 2008
Posts: 4,440
Likes: 148
From: Northwest
Actually not great advice for breaking in a motor... but hey, to each his own.
Road Warrior
Joined: Jul 2013
Posts: 1,725
Likes: 193
From: South
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Road Warrior
Joined: Nov 2010
Posts: 1,251
Likes: 30
From: Ashburn, VA
Maybe not good advice for you. I didn't follow this to the letter but did my own variation of it and my bike is living proof it works. You cannot tell the difference between my motor or another motor that was "broke-in" using the long drawn out process described in your service manual. I have also done this on a 2010 Toyota Corolla that is going 176,000 miles strong and a 2015 Ecoboost Explorer.
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Joe Kucinski
Outstanding HDF Member
Joined: Dec 2012
Posts: 2,557
Likes: 235
From: Texas
http://www.mototuneusa.com/break_in_secrets.htm
Maybe not good advice for you. I didn't follow this to the letter but did my own variation of it and my bike is living proof it works. You cannot tell the difference between my motor or another motor that was "broke-in" using the long drawn out process described in your service manual. I have also done this on a 2010 Toyota Corolla that is going 176,000 miles strong and a 2015 Ecoboost Explorer.
Maybe not good advice for you. I didn't follow this to the letter but did my own variation of it and my bike is living proof it works. You cannot tell the difference between my motor or another motor that was "broke-in" using the long drawn out process described in your service manual. I have also done this on a 2010 Toyota Corolla that is going 176,000 miles strong and a 2015 Ecoboost Explorer.
But seriously, I have followed this procedure for every new car, truck, or motorcycle I have purchased...every single one...and the only problems I ever had with any of them were not related to internal engine failures attributed to improper break-in, nor did they wear out early, they had other issues like failed engine sensors, collisions, bad gas clogging filters a couple of times, and a '82 Datsun pickup engine that got AFU in high water. I currently have almost 100K miles on my '07 F-150 and it was broken in the same way I drive it today. I use Ford syn-blend with Ford filters and change every 7000 miles, no more, no less.
I do generally break in a newly rebuilt engine but it is not a specific procedure but more of take it easy for a few hundred miles until all the new parts get meshed and worn together and I am confident that everything is good before going WOT.
Hey, but to each his own...I just go by what learned from my elders and my own experience.
