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[HD Street Performance]

Same motor as the 103 including the so-so parts that work fine with lower pressures overall.
A good example how collateral damage can occur by adding spring pressure, a higher lift faster ramp early closing intake cam along with the associated much higher cylinder pressure and still have to meet noise and EPA regs and pass the warranty point hopefully without major issues. Not too many 07s did that, the later models are better.

Then the after market starts to mess with them and that can be good or bad.
My comments are general and not related to the OP problem.

[MontyB]

Dumb question for the day... since there are so many guys that seem to like (or miss) the 103,  has anyone done a 'downgrade' of a 110 TO a 103??

[Unbalanced]

Monty that would be hard to do because the cases are cut to match up to the 110 bore.   To downgrade the 110 to a 103 would require getting new cases that were bored to the smaller bore of the 103.   I wonder though if the mothership would release cases smaller than you already bought if you wanted Vin replaced cases.   Lot of money to downgrade it, almost more cost effective to go a 117 or a 120.    

[Twolanerider]

Dumb question for the day... since there are so many guys that seem to like (or miss) the 103,  has anyone done a 'downgrade' of a 110 TO a 103??

Along with the difficulties that Harry mentioned is that you're likely making the comparative downgrade to a different 103".  The 103" that is so well respected is stroked extension of the old pre-07 88/95" motor.  The 103" that you're likely considering as a 110 variant is an overbored version of the 96" motor and has little effective relation to the older and more reliable "other" 103" motor.

[smiley1049]

Just an update bike has been at dealer since Tuesday the 16th as soon as they started it up they said it was a lifter noise I told them what was already done he question me if I new how to adjust valves he acted like I didn't know what I was doing I have been a journey man mechanic for 35 years anyway they said that they would check it out and let me know. They called me on Tuesday afternoon and told me I had a bent pushrod and they needed to replace it I told them to go ahead and also told them that wasn't the problem next morning got a call it still makes noise they wanted to replace the lifters I question them again but said ok as long as that was the problem (I new it wasn't) Guess what they just called again his first words is I guess you can tell me I told you so. So now we wait for their next phone call they are going to tear down motor and see what they find.

[HOGMIKE]

I had a similar complaint on a 2010 that made "noise" when cold/cool.....but seemed to get quieter when the motor was hot.
Pulled it down and found loose guide in rear exhaust (hottest part of the motor)..also check front ex guide, both needed replacement.
Just another thing to look at.
 

[smiley1049]

Well just got the bike back the verdict is excessive carbon due to bad rings. They replaced the rings cleaned carbon and honed the cylinders all is good so far.
Chuck

[Unbalanced]

Well just got the bike back the verdict is excessive carbon due to bad rings. They replaced the rings cleaned carbon and honed the cylinders all is good so far.
Chuck

Chuck,

Glad they got you up and running, but have to question the answer they gave you of bad rings.  What does bad rings mean?    I would expect them to go .005 over and put in new pistons / new rings and cut the cylinders to be sure they were correct with the correct piston to wall clearances especially if oil was getting past the rings and causing that much build up.   

[HD Street Performance]

If it is carbon from oil there are a few ways for that to happen. The oil consumption would have been noticed.
The valve seals/guides are right there for potential issues. The exhausts stick especially when the k-line seals are used with a little sloppy guide to valve stem fit.

[smiley1049]

Yes there was a little oil used on the last trip went through 1 qt in 2500 miles first time I had to add any oil to the bike went through 2 qts on last trip of 5900 miles. They pulled the valves and checked the guides and replaced valve stem seals they said guides were ok.
Chuck

[Eqcons]

Yes there was a little oil used on the last trip went through 1 qt in 2500 miles first time I had to add any oil to the bike went through 2 qts on last trip of 5900 miles. They pulled the valves and checked the guides and replaced valve stem seals they said guides were ok.
Chuck

That's about normal oil usage for all the 110s I've had....

[HD Street Performance]

Harley OEM 110 latest rev seals are far superior to the k-lines they used to use on the 07 and guys still use in shops. Ironically the 120r use k-lines, at least the small number of them I have worked on

[Lurch-the-Lurker]

Along with the difficulties that Harry mentioned is that you're likely making the comparative downgrade to a different 103".  The 103" that is so well respected is stroked extension of the old pre-07 88/95" motor.  The 103" that you're likely considering as a 110 variant is an overbored version of the 96" motor and has little effective relation to the older and more reliable "other" 103" motor.

Both 103" engines are the same bore and stroke.  What is so different, other than the heads and cams?

[HILLSIDECYCLE.COM]

If it is carbon from oil there are a few ways for that to happen. The oil consumption would have been noticed.
The valve seals/guides are right there for potential issues. The exhausts stick especially when the k-line seals are used with a little sloppy guide to valve stem fit.

AV&V guides, Viton seals, sized with a Goodson carbide reamer.................

[Twolanerider]

Both 103" engines are the same bore and stroke.  What is so different, other than the heads and cams?

Nearly everything.  03-06 103" motors versus the newer are different in the heads and cams as you mentioned.  Also in the engine cases, crank, cam plate and oil pump.  The cam chest parts are a moderate improvement.  But only moderate.  There are still tensioners to wear when gears would not (at least nearly so quickly).  The earlier engine was as close to very reliable as anything Harley built.  The bottom end held up.  The newer engines; not so much.  Significant differences in the engines.