2010 Cat
Road Master
Joined: Jul 2006
Posts: 862
Likes: 1
From: Western PA
[QUOTE=1potter1;6257483]
The pistons are'nt scorched, they are showing a carbon build up!
My builder was disgusted when he pulled these pistons. He did not say one way or the other. He had recently taken the top end apart on his H-Q 120 inch and you could still see the H-Q stamp on top of the pistons with 37k miles. He put it back together with out any new parts, convinced that it would last many more miles. I'd have to say that this was caused by a rich condition. I wish that I could have a look at the spark plugs. That would tell the story.
Come to think about it , the bike did seem to get poor gas milage. I just attributed that to it being new.
These pistons are out of my 2010 Ultra and have only 500 miles on them. I know that the cat has nothing to do with the way these pistons look but thought that you guys might want to rethink what you're doing as far a exhaust systems and fuel management.
Another 2010 owner with under 1000 miles pulled his apart for a build and reported exactly the same thing!
Kinda shabby in my honest opinion.[/QUO
Does your builder contribute the scorched pistons tips from a lean condition?
Another 2010 owner with under 1000 miles pulled his apart for a build and reported exactly the same thing!
Kinda shabby in my honest opinion.[/QUO
Does your builder contribute the scorched pistons tips from a lean condition?
My builder was disgusted when he pulled these pistons. He did not say one way or the other. He had recently taken the top end apart on his H-Q 120 inch and you could still see the H-Q stamp on top of the pistons with 37k miles. He put it back together with out any new parts, convinced that it would last many more miles. I'd have to say that this was caused by a rich condition. I wish that I could have a look at the spark plugs. That would tell the story.
Come to think about it , the bike did seem to get poor gas milage. I just attributed that to it being new.
Road Master
Joined: Jul 2006
Posts: 862
Likes: 1
From: Western PA
I was hoping that someone would chime in that might actually know. I'm thinking that because of the cat they can richen things up a bit and still meet epa standards but that is just a guess.
I do know one thing. I was way concerned when I saw the tops of those pistons that came out of my brand new ultra!
Cruiser
Joined: Apr 2009
Posts: 193
Likes: 0
From: Mississippi
You cant make me believe those are stock pistons with a factory tune.It must have had a tune a lil (or a lot)richer than stock with out upgraded pipes and air filter!My spark plugs are whiter now than they were when HD put them in there and I have 3000 miles on it.If that engine was running that rich then the check engine light should have been on all the time.And guzzled gas!
Big Block
Big Block
Road Captain
Joined: Jan 2006
Posts: 583
Likes: 7
You cant make me believe those are stock pistons with a factory tune.It must have had a tune a lil (or a lot)richer than stock with out upgraded pipes and air filter!My spark plugs are whiter now than they were when HD put them in there and I have 3000 miles on it.If that engine was running that rich then the check engine light should have been on all the time.And guzzled gas!
Big Block
Big Block
Ultimate HDF Member
Joined: May 2008
Posts: 7,439
Likes: 884
From: 'Noke, VA
RT. You have me thinking about it too. I rode the 07 out of the same dealer brand new. The valves pinged and it even backfired once in the first five miles. On the other hand the 2010 felt as it should brand new.
I was hoping that someone would chime in that might actually know. I'm thinking that because of the cat they can richen things up a bit and still meet epa standards but that is just a guess.
I do know one thing. I was way concerned when I saw the tops of those pistons that came out of my brand new ultra!
I was hoping that someone would chime in that might actually know. I'm thinking that because of the cat they can richen things up a bit and still meet epa standards but that is just a guess.
I do know one thing. I was way concerned when I saw the tops of those pistons that came out of my brand new ultra!
That would also explain why D&D says you can change pipes and A/C on a 2010 bike without a tune.
Veeeeeeeeery interesting.
Road Master
Joined: Jul 2006
Posts: 862
Likes: 1
From: Western PA
You cant make me believe those are stock pistons with a factory tune.It must have had a tune a lil (or a lot)richer than stock with out upgraded pipes and air filter!My spark plugs are whiter now than they were when HD put them in there and I have 3000 miles on it.If that engine was running that rich then the check engine light should have been on all the time.And guzzled gas!
Big Block
Big Block
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Road Master
Joined: Jul 2006
Posts: 862
Likes: 1
From: Western PA
Oh well, to me I'd rather spend the $ this way than on a CVO 110". This year I will be riding the HD that I only dreamed of before.