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[REDMAN]

A few weekends ago I had blue smoke coming out of my exhaust. I shut the bike down and had it towed to a local bike shop by our lake house. It ended up being a broken valve guide. Has anyone else experienced this? My mechanic said in 20+ years he had never seen this part fail before.

[grc]

I assume in his 20 years he didn't work on many CVO110's.  That was an all-to-common problem on the early 110's, and valve guide and stem issues persist to this day to some extent.  But I'll wait for the pro's to chime in and give you the details.

Jerry

[HD Street Performance]

Still this problem persists.
I take even new 110 heads and change the guides to AV&V, manganese bronze. They allow a tighter valve to guide fit and by virtue of the material offers lubricity. These combined with Viton valve seals keeps the oil out so coking does't occur and on the intake side oil stays out of the port thus out of the combustion burn.  This combination has proven to be very reliable and a reasonable life cycle for the heads is realized. I have many sets of heads with beyond 50k trouble free miles.

[HILLSIDECYCLE.COM]

We've witnessed that in 88" TC's before as well.
Dollars to donuts that it was fractured upon install and just now stb.
Scott

[johnsachs]

A consistent problem, and sometimes the owner doesn't realize there's a problem. 
John

[Jswerve]

A consistent problem, and sometimes the owner doesn't realize there's a problem. 
John

Ask me how I know...

[r0de_runr]

Steve at GMR has my bike right now doing the heads, found faulty guides.  Perhaps he'll post pics. 

[mark]

I can't ever see getting another 110.  Two guys I ride with have traded their CVOs and bought 103 tourers.  I'll be next...my 110 started using a qt. of oil every 1k miles before it had 15k miles on the ticker.  Was in two Harley shops last week kicking the tires on a '16 RGS and noticed both had unsold '15 CVOs...didn't even give them consideration.

[prodrag1320]

seen it here many times too.guide replacement has been the # 1 thing on 110 heads here for quite a while

[HILLSIDECYCLE.COM]

With a set of pipes, untuned, the rear 110" head goes thru living hell with the heat from the school bus cam.
AV&V bronze-maganese shouldered guides, with the seals, are the cure.
Scott

[Beak Boater]

Their are those who think that Harley's Twin Cool motors are to address that point exactly. Not so much about rider comfort, not about EPA and the emissions, about trying to cool the exhaust area down to keep the valve guides from moving around in the head. Have heard it from more than one knowledgeable person. Could be BS....don't know. Something to think about with all the valve problems in the 110's.

[JKM]

concerns around the valve guides and the OEM springs with too much pressure is why I had my heads done with AV&V components and ported

[HILLSIDECYCLE.COM]

AV&V products are what we use the most of here.
HUGE order came in yesterday from Goodson.
Scott

[GMR-PERFORMANCE]

Steve at GMR has my bike right now doing the heads, found faulty guides.  Perhaps he'll post pics.

Not much to show.. EX guide on one had had moved a bit and once we heated the head to remove it it fell apart.. So it was also cracked. Cracking in the head is common your needed a small amount of welding.  New AV&V guides and CNC valve job .. Better than new 

We do use av&v often but there are other guides that work just as well  KB has the same style with o-ring for sealing. So if your local shop does the work they may use that as well.. Both work without issue.

[HILLSIDECYCLE.COM]

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