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Author Topic: Slipped Flywheel  (Read 12632 times)

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Sunman48

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Re: Slipped Flywheel
« Reply #15 on: October 22, 2012, 12:47:25 PM »

they also. 18 month unlimited milage warranty

Thanks Lever.

Sunman
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prodrag1320

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Re: Slipped Flywheel
« Reply #16 on: October 22, 2012, 07:52:12 PM »


So if mine has slipped (the bike still runs great right now) what is the solution? Does anyone offer a crank that is welded, keyed, splined or something to prevent the flywheels from slipping? If I keep this bike and rebuild the engine (if mine has slipped) I would not want to replace with a new crank with the same potential problem.

Sunman
we use a EDM machine to burn a .250 hole thru the pin/wheel then press in a pin & weld over it.been doing this on drag race F/wheels WAY before twin cams where even thought of.they wont move after this

Sunman48

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Re: Slipped Flywheel
« Reply #17 on: October 22, 2012, 08:22:39 PM »

we use a EDM machine to burn a .250 hole thru the pin/wheel then press in a pin & weld over it.been doing this on drag race F/wheels WAY before twin cams where even thought of.they wont move after this

Thanks. I will talk to my shop about this.

Sunman
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HILLSIDECYCLE.COM

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Re: Slipped Flywheel
« Reply #18 on: October 23, 2012, 06:46:19 AM »

Not many outfits have an EDM.
Scott
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prodrag1320

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Re: Slipped Flywheel
« Reply #19 on: October 23, 2012, 07:39:33 AM »

we do,its actully more commenly called a EDM "hole popper".not used in intricate mold making like most EDM machines,buts perfect for burning perfect holes in very hard materials & burning out broken bolts or taps

HILLSIDECYCLE.COM

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Re: Slipped Flywheel
« Reply #20 on: October 23, 2012, 10:58:21 AM »

Handy item.
We've sourced a local Tool & Die shop(they ride) on rare occasions, if/when that need surfaces.
Handy item to have indeed. :2vrolijk_21:
Scott
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HILLSIDECYCLE.COM

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Re: Slipped Flywheel
« Reply #21 on: October 23, 2012, 11:05:51 AM »

we use a EDM machine to burn a .250 hole thru the pin/wheel then press in a pin & weld over it.been doing this on drag race F/wheels WAY before twin cams where even thought of.they wont move after this

We used to weld the shaft to the nut, then weld the nut to the wheel half, once locked up.
Once torqued to 450 ft/lbs., then welded, they'd stay put for us, but then again, we were only running "parts washing fluid" in our racer. :D
Scott
« Last Edit: October 23, 2012, 11:15:52 AM by Hillsidecycle.com »
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Sunman48

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Slipped Flywheel
« Reply #22 on: October 31, 2012, 12:23:00 PM »

Can anyone tell me how to check the crankshaft run out or how to tell if the flywheels have slipped? Any pictures? I need to go ahead and check this out. The service manual doesn't seem to cover this unless I just missed it.

Thanks,

Sunman
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Unbalanced

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Re: Slipped Flywheel
« Reply #23 on: October 31, 2012, 04:31:28 PM »

Check this video out :)

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Sunman48

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Re: Slipped Flywheel
« Reply #24 on: October 31, 2012, 06:45:36 PM »

Check this video out :)

Thanks! Good info.

Sunman
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HILLSIDECYCLE.COM

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Re: Slipped Flywheel
« Reply #25 on: November 01, 2012, 06:54:31 AM »


So if mine has slipped (the bike still runs great right now) what is the solution? Does anyone offer a crank that is welded, keyed, splined or something to prevent the flywheels from slipping? If I keep this bike and rebuild the engine (if mine has slipped) I would not want to replace with a new crank with the same potential problem.

Sunman

While we build/balance, and re-build/balance pre-1999 bolt-togather cranks here, and have for decades, using S&S Master Crankshaft Tooling,(just did a little 45" Flathead crank yesterday, for a client from Maryland) we release the press-togather crank assembly work to Hoban Bros./Darkhorse Crankworks, Newton Wisconsin.
Once they are completed with the needs of any given crankshaft, any pre-existing issues with that, will be put in the rear-view mirror. :2vrolijk_21:
Scott
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Sunman48

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Re: Slipped Flywheel
« Reply #26 on: November 01, 2012, 07:26:21 AM »

While we build/balance, and re-build/balance pre-1999 bolt-togather cranks here, and have for decades, using S&S Master Crankshaft Tooling,(just did a little 45" Flathead crank yesterday, for a client from Maryland) we release the press-togather crank assembly work to Hoban Bros./Darkhorse Crankworks, Newton Wisconsin.
Once they are completed with the needs of any given crankshaft, any pre-existing issues with that, will be put in the rear-view mirror. :2vrolijk_21:
Scott

Thanks Scott.

Sunman
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HILLSIDECYCLE.COM

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Re: Slipped Flywheel
« Reply #27 on: November 02, 2012, 06:14:56 AM »

Your welcome.
Scott
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Sunman48

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Help - Slipped Flywheel
« Reply #28 on: November 02, 2012, 03:07:06 PM »

OK. I don't want to beat this to death but, I need help. I have a trip planned the end of next week and until a week ago I never heard of slipped fly wheels! The indy shop (well recommended) that resealed my primary says he is almost positive that I have slipped fly wheels due to the motor vibration at idle. He checked front motor mount etc. but all is OK there. Today I called him back to see if he could check it out to tell me for sure this is the issue but the Republic of Texas Rally in Galveston is going on and he is out of pocket until Tuesday. One of his helpers tells me they have to pull the cam cover, trans cover and top end to check to see if the fly wheels have slipped. I don't know if he knows what he is talking about or not. I am pretty mechanically inclined having earned my living years ago as an auto mechanic and have done a lot of work on my bikes but never to this extent. Can any one tell me how slipped fly wheels can be diagnosed? Does the whole engine have to be torn down?

Appreciate any help!

Sunman
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Eqcons

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Re: Help - Slipped Flywheel
« Reply #29 on: November 02, 2012, 03:10:01 PM »

they have to pull the cam cover, trans cover and top end to check to see if the fly wheels have slipped.

He doesn't know what he's talking about.  Cam cover yes, but not the trans cover, and not the top end.

Jim
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