Tank Bushing

BADOG · 09-01-2011, 08:24 PM

I recently installed a new set of four of the rubber tank bushing's underneath my gas tank. At certain speeds, usually lower, and in the lower gears, the tank still vibrates. Am I missing something here, should they be kept a little looser or is their a certain torque rating on these I don't know about?

nine lives · 09-01-2011, 10:23 PM

What do you mean, is it making sound or just vibrating? It's gonna vibrate and move a bit.

BBChopper · 09-01-2011, 10:30 PM

Honey Badger dont give a shit let it shake!!!! Mine does!

MadMarx · 09-01-2011, 11:03 PM

On my 06 Mastiff the tank was vibrating against the top of the motor mount. I know your chopper tank isn't even close to that mount but my point is I unthreaded the rear tank bushing a few turns to raise my tank. Is it possible your tank is hitting something or are you only referring to movement?
At low rpms Everything shakes!!!

BADOG · 09-02-2011, 03:56 PM

I understand the vibrating, but the tank actually shakes.
Bushings are tight.

Nukeranger · 09-02-2011, 04:23 PM

FYI, I didn't know my tank was vibrating until I put my hand on it. I think it also makes a sound like something is loose or metal on metal at approximately 2500 rpm. I can say when I lost a throttle cable keeper down the handlebars, the loose item in the handlebar was louder. And, then of course, I got it out.

I might take my tank off today and look around. The weather sucks in Louisiana right now.

Oscar Maldonado · 09-02-2011, 04:43 PM

Not sure about torque specs, I sinch mine down pretty good. You're always going to have some movement with the vibration of the bike.

Nukeranger · 09-02-2011, 04:48 PM

14 ftlbs for the front tank mounting screws for 2008.

Oscar Maldonado · 09-02-2011, 04:49 PM

Quote:

Originally Posted by Nukeranger

14 ftlbs for the front tank mounting screws for 2008.

That's it? I put about 200 lbs of ass behind mine.

Nukeranger · 09-02-2011, 04:52 PM

Yep, Just looked again. Also use locktite. I would use more myself.

Doug760 · 09-02-2011, 05:03 PM

I have an annoying rattle at a certain rpm as well. I thought it was the gas cap as I could just touch the gas cap and it would go away. The cats at Gateway BigDog told me that it is the tank mounts that need to be torqued. Well, I did hit them with a torque wrench(14 ft\lbs) and the rattle went away for about 10 miles and then came back. I may have to try 20 ft/lbs and see if that makes a difference...

FatDog · 09-02-2011, 06:34 PM

My 06 Chopper does the same thing at high RPM's. I've tried tightening the bolts and nothing seems to correct it. I think there's just going to be a certain amount of vibration you'll get and every bike is different.

09-02-2011, 04:43 PM	#7 (permalink)
Oscar Maldonado Senior Member Name: Oscar Member #: 120 Join Date: Jul 2007 Location: Louisiana Posts: 5,552 My Bike(s): 04' Pitbull My Gallery Rep Power: 10	Not sure about torque specs, I sinch mine down pretty good. You're always going to have some movement with the vibration of the bike. __________________ That's right Son!!!

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09-01-2011, 11:03 PM	#4 (permalink)
MadMarx Member Name: Mark Member #: 4054 Join Date: Mar 2010 Location: NH Posts: 214 My Bike(s): 2006 Big Dog Mastiff My Gallery Rep Power: 4	On my 06 Mastiff the tank was vibrating against the top of the motor mount. I know your chopper tank isn't even close to that mount but my point is I unthreaded the rear tank bushing a few turns to raise my tank. Is it possible your tank is hitting something or are you only referring to movement? At low rpms Everything shakes!!!

09-02-2011, 05:03 PM	#11 (permalink)
Doug760 Member Member #: 3307 Join Date: Sep 2009 Location: Millstadt, IL Posts: 158 My Bike(s): Ridgeback My Gallery Rep Power: 4	I have an annoying rattle at a certain rpm as well. I thought it was the gas cap as I could just touch the gas cap and it would go away. The cats at Gateway BigDog told me that it is the tank mounts that need to be torqued. Well, I did hit them with a torque wrench(14 ft\lbs) and the rattle went away for about 10 miles and then came back. I may have to try 20 ft/lbs and see if that makes a difference...

09-02-2011, 06:34 PM	#12 (permalink)
FatDog Member Name: Jim Member #: 35 Join Date: Apr 2007 Location: ND Posts: 1,059 My Bike(s): 2006 Chopper & 2010 Street Glide & 2012 Polaris Assault My Gallery Rep Power: 7	My 06 Chopper does the same thing at high RPM's. I've tried tightening the bolts and nothing seems to correct it. I think there's just going to be a certain amount of vibration you'll get and every bike is different.