M8 engine flawed?
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Road Captain
Joined: May 2014
Posts: 515
Likes: 198
From: Oklahoma
M8 engine flawed?
On another forum a poster suggested the M8 engine has the same design flaws as the other HD engines. A flaw HD will likely never correct. The post: Look at where the piston rods attach to the crankshaft and how they try to address the inherent balance problem.
Can somebody translate for a layman?
Can somebody translate for a layman?
Yeah, if he's talking about the counter shaft, then in my opinion he get's it exactly backwards.
The "flaw" isn't the inherent imbalance of the 45 degree V-Twin design. The "flaw" is trying to remove it.
I like the way the traditional (pre-balance shaft) HD motors run. Don't see the point in trying to turn it into something it's not.
The "flaw" isn't the inherent imbalance of the 45 degree V-Twin design. The "flaw" is trying to remove it.
I like the way the traditional (pre-balance shaft) HD motors run. Don't see the point in trying to turn it into something it's not.
Road Master
Joined: Jul 2015
Posts: 959
Likes: 267
From: San Fernando Valley, CA
Yeah, if he's talking about the counter shaft, then in my opinion he get's it exactly backwards.
The "flaw" isn't the inherent imbalance of the 45 degree V-Twin design. The "flaw" is trying to remove it.
I like the way the traditional (pre-balance shaft) HD motors run. Don't see the point in trying to turn it into something it's not.
The "flaw" isn't the inherent imbalance of the 45 degree V-Twin design. The "flaw" is trying to remove it.
I like the way the traditional (pre-balance shaft) HD motors run. Don't see the point in trying to turn it into something it's not.
That's why I love my Evo. The TC88B in my Heritage is so boring at idle.
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Seasoned HDF Member
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From: Pine Flat Dam/South Bay Area, CA
I believe OP was referring to the male & female connecting rods on a common crankpin using roller bearings. Most modern engines employ a side by side rod setup with plain bearings
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Seasoned HDF Member
Joined: Jun 2010
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From: Upstate New York
But why is that a "design flaw"? Just because other manufacturers no longer do that doesn't make Harley "wrong". Side by side rods and plain bearings are cheaper to make, that's why other manufacturers do it.
Road Captain
Joined: Nov 2015
Posts: 528
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From: Anaheim, CA
The same people that are buying these things now and complaining about it, are the same people who complained about vibration on their older motors.
If you have an issue with vibration, you're buying the wrong bike. Get yourself a nice Jap sport tourer and move along.
Rigid mounts and hardtails
If you have an issue with vibration, you're buying the wrong bike. Get yourself a nice Jap sport tourer and move along.
Rigid mounts and hardtails