proper piston ring break-in procedure
Extreme HDF Member
Joined: Nov 2006
Posts: 13,389
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From: Windham,Maine
This one like helmets,leathers,and all other things people are passionate about has many an opinion!Know for certain what has worked for me over the last 45 yrs no need to try anything different.Hastings reccommends it the way most of us do it.
Road Captain
Joined: Sep 2007
Posts: 742
Likes: 4
From: Twin Cities, MN
A new bike engine has been "run in" at the factory, before released for sale. Seating rings, as per the article, is for "overhauls," and is what many gurus recommend. When installing new rings in a new overhaul, warm the bike up to operating temperature, roll on the throttle hard several times, and your new rings are seated. Baby it, and you'll use oil forever.
The only thing I would add, is let the engine cool down before re-torqueing and setting tappets, etc.
http://www.americanrider.com/output.cfm?id=1054261
Break-In The only parts of your new 95-inch Twin Cam engine that need break-in are the piston rings and the cylinder walls they run on. This can and should be done in a very short time and over a short distance; a few minutes and a few miles, in fact.
The precision of the Wiseco bore job, their pistons, and the rings are such that only small initial wear is required to properly seat the rings. The proven best way to accomplish this is to load the rings against the walls of the cylinders by accelerating at full throttle. Here is how you go about seating your new piston rings:
1) Do not start the engine until you are ready to ride the bike.
2) After starting, quickly get out on the road and into third gear.
3) Accelerate at full throttle from 30 to 60 mph in third gear.
4) Close the throttle and coast back to 30 mph.
5) Repeat this full throttle/coast procedure a total of 10 times.
6) The rings are now seated and you can ride normally.
Been there, done that.
The only thing I would add, is let the engine cool down before re-torqueing and setting tappets, etc.
http://www.americanrider.com/output.cfm?id=1054261
Break-In The only parts of your new 95-inch Twin Cam engine that need break-in are the piston rings and the cylinder walls they run on. This can and should be done in a very short time and over a short distance; a few minutes and a few miles, in fact.
The precision of the Wiseco bore job, their pistons, and the rings are such that only small initial wear is required to properly seat the rings. The proven best way to accomplish this is to load the rings against the walls of the cylinders by accelerating at full throttle. Here is how you go about seating your new piston rings:
1) Do not start the engine until you are ready to ride the bike.
2) After starting, quickly get out on the road and into third gear.
3) Accelerate at full throttle from 30 to 60 mph in third gear.
4) Close the throttle and coast back to 30 mph.
5) Repeat this full throttle/coast procedure a total of 10 times.
6) The rings are now seated and you can ride normally.
Been there, done that.
Exactly!!
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streeteagle
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