I use engine breaking together with breakes, smoothly, cool.

 

Just an observation but if downshifting and engine breaking would shift flywheels I would ASSUME most of the 2003-up bikes would have shifted flywheels by now as most everyone I know and have known uses downshifting and engine braking to control their speeds.

We see a lot of shifted flywheels and know the riders well enough to know they do a lot of racing, burnouts, and wheelies and expect to pay to have their flywheels trued and welded after they twist/shift them.

If a rider is not abusive the flywheels probably will never shift/twist unless they were out of spec from factory delivery.

We have literally hundreds of customers that put anywhere from 5,000 to 15,000 miles per year on their 2003-up bikes with 103&under builds (over that we weld the pin) that have never had an issue with their flywheels shifting.

Maybe someone can explain how flywheels shift or twist by downshifting or engine braking.
Thanks in advance,
Bob

 

Very many have, and you are well aware of it Bob. You read the same info I read while we used to post HTT together.
Very many crankshift stories, including the shifting of my own crankshaft.


No explanation needed.

The answer is too obvious. Accelerating puts force in one direction, sudden decel puts the force in the opposite direction. Meanwhile your drivetrain is all connected with the engine, as well as the pavement.

Pretty agressive post there, Mr. 4 post wonder! LOL

(Dude follows me around from board to board). It's a personal thing that he can't let go of. Hee hee!

Please Bob, let it go!!! How can you follow me all over the internet like that?
You need help man!

 

Do you put your car/truck in neutral when you let off the gas? No? Same principal.

 

As far at that goes, my truck (Chevy Duramax/Allison trans) will down shift and engine brake on its own if I am going down hill for a period of time while riding the brakes and is senses the speed isnt slowing down.

Did this going down Pikes peak. They check your brake temps about half way down with a temp gun. If your brakes are hot, you don't leave untill they cool off. Mine were barely warm. The parks attendant was surprised.

 

Anyone else had their flywheels shift/twist from downshifting and/or engine braking?

 

These engines cannot be that fragile. Engine braking is normal with any manual transmission. It just happens during accel/decel on curves and with traffic. Are people talking about doing extreme crap?

 

I think so! LOL All I said was that I go easy on the downshifts/engine breaking.
I never said anything about being against it. NEVER!

How it got turned around into some wierd chit, I'll never know! LOL
I've been riding for almost 40 years,..... not like I am new at it.

I twisted a crank before, so now I am a lil more careful. PERIOD!
So sue me. Get all upset about it. I don't care.
I'm surely not gonna beat up my crank over it.

Sheash !

Alls I tried to do is share an experience,.... now I am a crook or something.
I just don't get it. <nodding his head in amazement>

Unfukkingbelievable,...... I just,.... don't,.... get it.


You all ought to do a search on twisted crankshafts, then come back and re read this thread. Perhaps THEN you'll "get it".

 

Why the 2003 and up bikes having more problems with this? I recall hearing about a bearing change about that time. Twisted cranks, huh. I'll have to research it. I come from a world of rolling off the throttle at 15,000 RPM. Now that's engine braking! Of course, inline 4's don't engine brake like a twin, but geez. I ride the Deuce like a baby, so I don't neccessarily anticipate any problems, but I'm interested in learning the HD engine since it's so much different than what I'm used to.

 

The cranks are press fit. Parts assembled with no welding.
A good yank in the wrong direction is all it takes.
For example if you accidentally drop one too many gears during downshift.

Lots of (hard) early shifts with a torquey cam can have the same effect during acceleration.

I am shocked that more folks on this board are not aware of this!
It's fairly common knowledge elsewhere.

Sorry if I offended anyone by mentioning it.




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