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[guppytrash]

 
Replacement engines for 2007 and newer FLH's
 Looking for 2 things.
1. Reliability...looking for the mystical bullet proof engine or as close to indestructible as the aftermarket has.
2. Performance... something that will blow the doors off 90% of the bikes on the road but can handle 2 up riding in town with some manners.
 
I know there are many engine builders who are great at reworking the flaws of mass produced HD motors. 
For this discussion please leave that option out, that can be another thread.

[grc]

 
Replacement engines for 2007 and newer FLH's
 Looking for 2 things.
1. Reliability...looking for the mystical bullet proof engine or as close to indestructible as the aftermarket has.
2. Performance... something that will blow the doors off 90% of the bikes on the road but can handle 2 up riding in town with some manners.
 
I know there are many engine builders who are great at reworking the flaws of mass produced HD motors.  
For this discussion please leave that option out, that can be another thread.

Unlike the situation with EVO engines, where S&S and a ton of others offer bolt-in complete engine replacements, there is only one such engine replacement for Twin Cams.  Unfortunately, it is the product JIM'S sells under license from Harley, and if you read some of the threads concerning both the engines themselves and the customer service of JIM'S you will be unlikely to consider that product an improvement over the Harley offering.

So even though you don't want to talk about having the stock cases rebuilt into a decent engine by a reputable engine builder, that might be the only viable option, at least until Harley's various patents expire.


Jerry

edit:  It appears that S&S has in fact come out with Twin Cam replacements recently.  The online S&S catalog still doesn't show a replacement for the '07 and later engines, but it appears they have something coming for those as well.

[hawgzilla]

I'm sure some will disagree but it's going to be hard to beat the Harley 120R for what you want to do.

[Unbalanced]

Jim's just release a 135 for alpha only, fits flh's flht as well as dyna.   90 or later to current will fit.   They are available in evo model, late model twin cam and new twin cam available.   8600.00 retail.

This is on top of the 120/131 they already have.

Although you can no longer get it with the heads saying Screaming Eagle  

roland Sands Clear cam cover as well as the new lifters and new pushrod tubes.  4 5/8  x 4.310  stroke

http://www.jimsusa.com/pdf/135_flyer.pdf


Still hard to beat the 120r with a little added compression for the dollar.  

[twinotter]

S&S is now offering their 124" crate motor for 07 and up, see Starracing. I have the version for up to 06, it has 30000klms on it now, tota; repair cost to date is $12. Give 45 mpg at 70 mph (US).
The 120R's are reported to have issues with lifters due to extreme valve spring pressures.  FWIW twinotter

[HILLSIDECYCLE.COM]

S&S.
Scott

[prodrag1320]

we`ve done alot of 124" S&S builds on the early & later motors,VERY good power & reliability

[HD Street Performance]

The 120R's are reported to have issues with lifters due to extreme valve spring pressures.

Not the root cause but a contributer, easily fixed

[happyman]

The 120R's are reported to have issues with lifters due to extreme valve spring pressures.

Not the root cause but a contributer, easily fixed

which if either is the cause or both?

[Unbalanced]

12k miles and no issues, guess its just luck of the draw, although changing out the lifters does quiet the top end quite a bit.

[happyman]

12k miles and no issues, guess its just luck of the draw, although changing out the lifters does quiet the top end quite a bit.

what  part # did you run by chance if you recall? thats the lifters

[sadunbar]

The 120R's are reported to have issues with lifters due to extreme valve spring pressures.

Not the root cause but a contributer, easily fixed

Extreme valve spring pressures?  According to>?   

What's the root cause and how are lifter issues easily fixed?      

With all the lifter threads across multiple forums, I'm sure many are anxious to learn the solution...   


I have 15k on my 120r.  I've replaced the lifters, but only out of caution, not due to issues.  Although I couldn't explain why, my 120r is significantly quieter than my 110.  No where near as much "valve train" noise (if the valve train was truely the source my 110 clatter).   I replaced lifters in my 110 mutiple times due to noise and issues with pumping up. 

[happyman]

Extreme valve spring pressures?  According to>?   

What's the root cause and how are lifter issues easily fixed?      

With all the lifter threads across multiple forums, I'm sure many are anxious to learn the solution...   


I have 15k on my 120r.  I've replaced the lifters, but only out of caution, not due to issues.  Although I couldn't explain why, my 120r is significantly quieter than my 110.  No where near as much "valve train" noise (if the valve train was truely the source my 110 clatter).   I replaced lifters in my 110 mutiple times due to noise and issues with pumping up. 

its a secret

[HD Street Performance]

Spring rate is 516# actual measured on the MVA heads, dual spring no dampner.
The issues were well documented on the VTwin forum for those that truly care to research it. Autoworker presented data from CMM and metalugy testing. The rollers were skating, the lobes not square to the roller surface therefore not full surface contact across the lobe area.
Not already mentions are the oil consumption issues some are having.
It would not surprise me and I suspect it is not the rings. The MVA heads use the valve seals that were obsoleted on the CVO production heads, K-line is the origin, these are what were standard issue on the 07 CVO110 (recall program) but they have added stem to guide clearance on these later heads.

[happyman]

Spring rate is 516# actual measured on the MVA heads, dual spring no dampner.
The issues were well documented on the VTwin forum for those that truely care to research it. Autoworker presented data from CMM and metalugy testing. The rollers were skating, the lobes not square to the roller surface for full contact area.

 so what really needs to be done to square things up.  that sounds like a serious screw up to be honest. so there is going to be a heck of a load on the roller ,but not in the center.   things could go wrong regardless of lifter choice or rockers? got to wonder  what the rest of the  motors  96", 103 are like with regrd to this info.