Ya ever notice...
Thread Starter
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Cruiser
Joined: Aug 2008
Posts: 159
Likes: 1
Ya ever notice...
On a fresh rebuild of the motor how hard it is to keep from busting loose in that first 500 miles. I just made major changes to the '96 FXSTSB and every time I take it out I just wanna see exactly what the new top end can do!
Oh well, 250 miles down, 250 to go... then the fun really begins LOL
Oh well, 250 miles down, 250 to go... then the fun really begins LOL
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
Patience is a virtue! But yes it is hard, although the 'rules' seem strange. My last new bike was my Firebolt and I was given strict instructions to keep it below a given rev limit for a short distance, then a slightly higher one for the next phase of running in. That corresponded to 90mph in top gear, so 'running in' is something I really haven't got done, after 4 years ownership!
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Cruiser
Joined: Aug 2008
Posts: 159
Likes: 1
Yup, seems like everyone has a different view on how to do it... but my local indie wrench had the best concept I ever heard, "Ever heard of anyone blowing a new motor by takin it easy?"
Think I'll keep following that advise it worked on the '88 I had before
Think I'll keep following that advise it worked on the '88 I had before
Thread Starter
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Cruiser
Joined: Aug 2008
Posts: 159
Likes: 1
And another thought....
Remember the old anti-evo T's guys used to wear?
Hear No EVO
See No EVO
RIDE NO EVO
LOL, found a pic with a buddy wearing one, now they seem to be the dominant old school bike LOL
Remember the old anti-evo T's guys used to wear?
Hear No EVO
See No EVO
RIDE NO EVO
LOL, found a pic with a buddy wearing one, now they seem to be the dominant old school bike LOL
Elite HDF Member
Joined: Sep 2007
Posts: 4,468
Likes: 12
From: Bluffton, South Carolina
Yep, we build beautiful engine for a customer and give him the break-in procedures. Only to have one of his buddies stop in the next day and say" That engine you built is a killer, he smoked so and so last night!!!"
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
Advanced
Joined: Sep 2008
Posts: 67
Likes: 0
From: wisconsin
I have broken in many motors all the same. I get on it right away not excessively but enuff to get the combustion pressure up to push the rings out, don't dog it, don't let it idle, very your speeds and most important don't rev the **** out of it, I have yet to have one use oil.
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Road Warrior
Joined: Oct 2009
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soooo true ! lol .
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Seasoned HDF Member
Joined: Aug 2008
Posts: 5,080
Likes: 2,154
From: Ohio
Dyno tuning a new EFI engine during initial breakin, big builds with EFI have to be dyno tuned to assure of proper afr's, I know they still heat cycle them on the dyno but then I believe they turn them loose to set wide open throttle afr's.
Attached a completly opposite breakin article http://www.mototuneusa.com/break_in_secrets.htm
We are instructed on a big rig diesels to assure of oil pressure, no leaks and load the engine as soon as possible to build heat in the cylinders, chrome moly rings need heat and pressure to seal, this came from Cummins and Cat engine instructers. Different creatures but have aluminum pistons and chrome moly top rings, Is this best for a Harley, hell I don't know.
Attached a completly opposite breakin article http://www.mototuneusa.com/break_in_secrets.htm
We are instructed on a big rig diesels to assure of oil pressure, no leaks and load the engine as soon as possible to build heat in the cylinders, chrome moly rings need heat and pressure to seal, this came from Cummins and Cat engine instructers. Different creatures but have aluminum pistons and chrome moly top rings, Is this best for a Harley, hell I don't know.
Last edited by 1997bagger; Feb 18, 2011 at 01:31 AM.