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[brassspike]

2008 SERK This motor has never run well. Not what I expected from a 110 anyway. After all the recalls it still is not up to par. The latest trip to the dealer was for a new front head. This time it was worse and dynoed at 81 HP.  I could hear a miss at idle but not at speed. I took it to an independant and he got 95 on the front and 120 on the rear with the compression release disconnected. I had them rebuild the top end. Still had the sound so, after 2500 miles I checked the compression myself. 95 on the front anf 125 on the rear with compression release on and 120 and 155 rear with the release disconnected. I believe it should be over 200, Any ideas before I have to sell the damn thing?
Thanks!

[erniezap]

Depending upon which cams you are using, compression should be 180-200

[brassspike]

Depending upon which cams you are using, compression should be 180-200

Stock 255's

[brassspike]

Here is the link to what was going on before the (last) top end rebuild. very similar.
http://www.cvoharley.com/smf/index.php?topic=61185.0
There has got to be something we are not catching. Other than the oil burning is back again.

[2harleys]

Depending upon which cams you are using, compression should be 180-200

Also depends on where you live, as altitude will effect compression readings.  Higher altitude=lower compression --  I think you lose about 5 lbs per thousand foot of altitude. --  They should be equal in front and rear cylinders though.

[Doc 1]

Do a leak down test to see if it is a valve, rings, or a compression release that is allowing air to escape. The slightest bit of carbon on the seat of the compression release will give you fits because you can't hear them leaking since the exit port is in the exhaust port.
Doc

[brassspike]

Thanks Doc but I don't have a leak down set. I'll check around for one that I can borrow.

[Trapperdog]

You said they "rebuilt the top end".  What exactly did the do? Neither shop did a leak down ?  You might have the second shop do one now and hope he stands behind his work.

[brassspike]

You said they "rebuilt the top end".  What exactly did the do? Neither shop did a leak down ?  You might have the second shop do one now and hope he stands behind his work.

Rings, head gaskets, lapped valves, and reamed the guides. The harley dealer had the stems so tight that the indy had to knock them out. I really feel that the indy did a good job even though he was only about 5psi better in the end. I don't know what to do except have them pull the acrs and block the holes. There are only so many places the compression can go??
I'm wondering if the dealer put the wrong casting of head on the front that has a differen CR from the rear. I havent had to change the oil though. It's back to changing itself but no smoke. 2 quarts in that 2500 miles.

[erniezap]

Could be that the rings didn't seat correctly or that the pistons are too small for the cylinders.  Without  a leak down test you are just shooting in the dark though.  Something isn't right

[brassspike]

Called the dealer west of here twice and emailed once. No reply or return call so I guess they are out. It's no wonder these dealers are going out of business. My bet is on the releases. I checked the records of work that I have and the shops keep replacing ACR's. I might pull the tank and rocker covers and pull the ACR's. Maybe they are sticking. Might see if I can just do away with them.
This will be Maggies last trip to the shop (if I can find one) I'm about done.  She is good looking and rides nice but his 110 crap is more than I can take. I wish that I had know this before I signed on the dotted line!
Looked the Victory stuff over yesterday. Not as nice looking but hey, if they are reliable.....

[brassspike]

Well maybe I'll find out this time. I was riding to the next dealer for them to take a look at the bike and Maggie s&$t the bed! While I was on the interstate I noticed a noise from the engine. I was not far from the dealer so I rode it on in. It sounded like a combination of rocks grinding around and gears turning. Still seemed to run the same though.

[brassspike]

So far, Bent valve, oil pump, Cam Plate, loose compensator, and valve seals....again! All that and this thing gets babied all the time. I'll have a compression test done before I pick it up this time.
Have any of you engine guys seen anything like this?

[Unbalanced]

Wondering if you propped the throttleblade open since DBW will not open the butterfly when you do a compression test.  Are you turning the motor over till the gauge wont move anymore ?

[HILLSIDECYCLE.COM]

Throttle plate open, releases disabled, and 8 complete cranks on the stater motor, with a battery charger in place, is the correct method.