Lots of Internal Pics + Good Tech Info

[City Chicken]

http://www.motorcyclistonline.com/harleys-all-new-milwaukee-eight-big-twin#page-8

[jbexeter]

looks like not a hell of a lot of piston skirt to transfer all that torque to the bores.


arguably the cylinder head is the most important part of an IC engine, and the new one just leaves me uneasy, what's this, some sort of breather, or an oil particle filter for all those tiny galleries around the valve stems??

https://www.facebook.com/bertsbarracuda/photos/a.154215881310217.38250.153560658042406/1109487625783033/?type=3&theater

[rageglide]

Interesting breather design.  Will be a lot more difficult for oil to fill up the breather and carry out to the atmosphere.

I wonder if the additional passage in the cylinder feeds the breather.  Would make a lot more sense than the old style which often has the pickup side fo the breather immersed in oil.   

[rbabos]

looks like not a hell of a lot of piston skirt to transfer all that torque to the bores.


arguably the cylinder head is the most important part of an IC engine, and the new one just leaves me uneasy, what's this, some sort of breather, or an oil particle filter for all those tiny galleries around the valve stems??

https://www.facebook.com/bertsbarracuda/photos/a.154215881310217.38250.153560658042406/1109487625783033/?type=3&theater

Just a larger condenser area for vapors before venting out of engine. Let's face it that mini disc pad was a joke before.
Ron

[VDeuce]

Should be fun changing that second spark plug...

[Pete_Vit]

http://www.motorcyclistonline.com/harleys-all-new-milwaukee-eight-big-twin#page-8

looks like a lot of pressure on the entire top end, from cam to rockers now with 2 valve springs to push 

[SP33DY]

looks like a lot of pressure on the entire top end, from cam to rockers now with 2 valve springs to push

Those two valve springs probably won't take any any more force than a single beehive on a TC.

[rich1]

Looking forward to the experts on here looking at the photos.  And pointing out what they see and strengths and weaknesses.

[Pete_Vit]

looks like a lot of pressure on the entire top end, from cam to rockers now with 2 valve springs to push

Those two valve springs probably won't take any any more force than a single beehive on a TC.

prolly right, I just can't wait for the stage I - III upgrades + new heads requiring new rocker boxes or rocker arms..etc

[wfolarry]

http://www.baggersmag.com/

[wfolarry]

http://www.motorcyclistonline.com/harleys-all-new-milwaukee-eight-big-twin#page-8

looks like a lot of pressure on the entire top end, from cam to rockers now with 2 valve springs to push 

Lighter valves, lighter springs & less lift = less work performed.

[No Cents]

 just looking at the pictures the first thing I noticed was the front cylinder looks to be offset to the right from the rear cylinder...then the cases are totally different for the lifters...no more pins holding the lifters straight in their bore.
And how would you change the plug under the tank...without lifting the tank off.    just a few things I noticed.

Ray

[rbabos]

just looking at the pictures the first thing I noticed was the front cylinder looks to be offset to the right from the rear cylinder...then the cases are totally different for the lifters...no more pins holding the lifters straight in their bore.
And how would you change the plug under the tank...without lifting the tank off.    just a few things I noticed.

Ray

I see no cyl offset but lifter bores are due to the longer camshaft.
Ron

[Soft 02]

[-deuced-]

Some good pics there. Spark plugs will probably last for years. Still got forked conrods, cylinders are inline. Small end and lifter bores look a bit rough. Is the counterbalancer drive gear adjustable? Is the oil pump 3 stage? Torrington inner cam bearing? Same cases for all families? Rocker shafts appear to be locked down. Oil lines in rocker arms are interesting.

[CowboyTutt]

Is that gear drive set-up on the crank-driven balancer going to be noisy?  Victory bikes sound terrible at start up and idling (at least the last one I heard years ago did).  Whirred away like a gear driven cam Honda V4.  Hope not.  The Softail set-up was chain driven IIRC. 

-Tutt 

[Soft 02]

The pin and slot look more worrisome. Gear must be made of Unubtanium.

[rageglide]

I was wondering the same about that pin and slot... Not sure why they would use an arrangement like that.  Would think it'd clunk on and off throttle or at startup. 

Of course these new cranks won't shift so gear whine shouldn't be a problem...

[-deuced-]

Looks like timing marks on those counterbalancer gears. Would altering gear position effect balance factor? 75% for rubber mount and 100% for solid mount.

[rbabos]

Too hard to tell from the pics but I suspect on that lightening hole only half is removed with a round hole in the bottom half. To slop around like that would be nonsensical.
Ron

[TXChop]

Who's gonna be the first to shear the pin off? Seen it many times on vanos units on foreign car camshafts.

[TXChop]

 Any notice the ball bag fan. Me thinks this EPA motor may run hot from the factory.

http://www.harley-davidson.com/store/coolflow-fan

And the giant fanned oil cooler upgrade.

http://www.harley-davidson.com/store/fan-assisted-oil-cooler-kit

[FSG]

Looks like timing marks on those counterbalancer gears. Would altering gear position effect balance factor? 75% for rubber mount and 100% for solid mount.

how much would it need to move for the weight to hit the big end   

[-deuced-]

Yeah, good point. I don't think it's a dowel pin, perhaps more of a safeguard. I'm thinking counterbalancer sprocket is a press fit, like tc softails. If it does move it's only going to go that far.

[yobtaf103]

Looks like timing marks on those counterbalancer gears. Would altering gear position effect balance factor? 75% for rubber mount and 100% for solid mount.

how much would it need to move for the weight to hit the big end   

Must have missed it , so these are not rigid mount still some rubber mount?
Seen the video mention they could have gone 100% but too smooth (for character), be interesting to see which way they go on Softail/ Dyna

H,mm the big heat management cure is oil cooled heads in the main line motors, (still avoiding the unsightly radiator problem since the nova) is there a fan on the oil rad?