BARF - Bay Area Riders Forum

Go Back   BARF - Bay Area Riders Forum > Moto > The Garage


Notices

Reply
 
Thread Tools Display Modes
Old 08-26-2020, 08:56 AM   #1
dravnx
Veteran
 
dravnx's Avatar
 
AMA #3018349
BARF Sammich King
Contributor +++++++++
Barf Roadside Angel

Join Date: Dec 2012
Location: santa rosa, ca
Motorcycles: '12 DL650A GMF '17 DL650 '15 FJR1300A
Name: Jeff
tie down and forks

Does tightly strapping a bike on a trailer cause fork seals to blow out? I've always heard this but I don't understand why strapping a bike down would cause any more stress then actually riding it. I'm not talking strapping it down so the forks are fully depressed but enough to keep the bike from jumping around on the trailer.
__________________
bike X miles=smiles
smiles ÷ bike=miles
smiles ÷ miles=bike.
It's simple math.
https://www.directavionics.com/
dravnx is offline   Reply With Quote
Old 08-26-2020, 09:07 AM   #2
spdt509
Veteran
 
spdt509's Avatar
 
AMA #: 817931
Founding Member
Contributor +++

Join Date: Aug 2002
Location: the city
Motorcycles: 98 triumph speed triple
Name: jake ryan
what you're referring to its the pic below(yes, its in a truck but the same applies). don't do it that way and you'll be fine...

Click image for larger version

Name:	xt225.jpg
Views:	93
Size:	46.4 KB
ID:	536649
spdt509 is offline   Reply With Quote
Old 08-26-2020, 09:34 AM   #3
Busy Little Shop
Man behaving bikely...
 
Busy Little Shop's Avatar
 

Join Date: Aug 2007
Location: Sacramento Ca.
Motorcycles: Honda RC45 RC30
Name: Larry L
Chief causes for seals to leak are fork tube nicks or just being worn out not tie down compression...
__________________
Have a wheelie NICE day...
Lean & Mean it in every corner of your life...
If it wasn't for us the fast lane would rust...
V4'S are music to the seat of my pants...
1952 De Havilland Chipmunk...
https://www.youtube.com/user/BusyLittleShop/feed
http://s1036.photobucket.com/user/Bu...?sort=3&page=1
http://s1036.photobucket.com/user/Bu...?sort=3&page=1
http://www.flickr.com/photos/55532474@N00/?saved=1
http://www.flickr.com/photos/10503451@N07/
Busy Little Shop is offline   Reply With Quote
Old 08-26-2020, 09:59 AM   #4
afm199
Veteran
 
afm199's Avatar
 
Mod Alumni
Founding Member
Top Percent Poster
Contributor +++++++++ +++++++++++++++++3%

Join Date: Sep 2002
Location: Oaklamd
Motorcycles: Yamasuzhonaki 1450
Name: Mikezebub
Don't compress them fully and you will be fine.
__________________
That's not true! The lie is actually the truth! I know. Lots of people know this.
afm199 is offline   Reply With Quote
Old 08-26-2020, 10:40 AM   #5
thedub
Octane Socks
 
thedub's Avatar
 
AMA #: 2952025

Join Date: Sep 2010
Location: Gardnerville, NV
Motorcycles: R6, Tiger 800, KTM 500, KTM 350
Name: Wiles
Quote:
Originally Posted by dravnx View Post
Does tightly strapping a bike on a trailer cause fork seals to blow out? I've always heard this but I don't understand why strapping a bike down would cause any more stress then actually riding it
No, it doesn't. If you are at all familiar with the way oil seals are designed, it's obvious why not. Oil seals have a cavity on the oil side, so when the pressure builds up behind the seal it exerts more pressure on the sealing surface, which keeps the oil from being forced out. Your seals don't blow out when compressed, they just get better at sealing.
This video explains it better: https://youtu.be/Hy6cKKEdXB8?t=172

So why have you always heard that strapping your bike down will blow the seals? How did this often repeated and long standing rumor get started?

Strapping down a bike with good seals will not make them leak. But if the seal is already compromised, maybe there is a piece of grit in there, or maybe the lip is nicked or whatever, strapping it down with the forks compressed will force oil past the already bad seal.
If you arrive at your destination and there is a puddle of fork oil in the pickup bed, the incorrect conclusion you may draw is that tying the bike down is what caused the seals to leak, rather than revealing an already bad seal. Then you tell everyone on the internet and they tell everyone on the internet and here we are with a widely believed ongoing misconception.
__________________
AFM #77, D36 #166N
Thanks for the support;
Sidi|Motion Pro|C@TT|Vortex|Shoei
thedub is offline   Reply With Quote
Old 08-26-2020, 04:49 PM   #6
wheel_muse
bicycles 'n motos
 
wheel_muse's Avatar
 
Contributor +++++ GOP

Join Date: Mar 2008
Location: Central Contra Costa
Motorcycles: '18 Honda NC750XD
Name: Brian
I don't think there's any damage done, if it's short-term. Of course, don't store the bike this way!

I had an unfortunate incident with an old Honda 350 XLR dual sport. It had a cool feature of coil spring forks with air adjustment; you could add air to increase the spring rate.

I guess the air leaked down during transport. Straps got loose. Bike fell out of the hitch rack when I went over some railroad tracks. Luckily, not much damage.

Lessons: check bike on rack regularly, watch the rearview mirror, be especially vigilant with older bikes.
wheel_muse is offline   Reply With Quote
Old 08-27-2020, 06:19 AM   #7
Maddevill
KNGKAW
 
Maddevill's Avatar
 
AMA #: 542337

Join Date: Jun 2005
Location: Hayward
Motorcycles: ZX14,GS750E, KTM 450/540
Name: Steve
You can put one of those plastic supports or even a piece of 2x4 between the front tire and bottom tree. Tighten it down to your heart's content.

Mad
__________________
If your nose runs and your feet smell, you're built upside down.
Maddevill is offline   Reply With Quote
Old 08-27-2020, 08:37 AM   #8
dravnx
Veteran
 
dravnx's Avatar
 
AMA #3018349
BARF Sammich King
Contributor +++++++++
Barf Roadside Angel

Join Date: Dec 2012
Location: santa rosa, ca
Motorcycles: '12 DL650A GMF '17 DL650 '15 FJR1300A
Name: Jeff
I've trailered bikes and never worried about the forks. The fork seal warning was brought up by another rider on another forum after someone posted a picture of a bike on a trailer. My posting is more about where the OWT came from and why.
__________________
bike X miles=smiles
smiles ÷ bike=miles
smiles ÷ miles=bike.
It's simple math.
https://www.directavionics.com/
dravnx is offline   Reply With Quote
Old 08-27-2020, 09:02 AM   #9
stangmx13
not Stan
 
stangmx13's Avatar
 
Contributor
BrotoGP

Join Date: Feb 2005
Location: San Diego CA
Motorcycles: 04' 600RR, 09' 600RR, 15' R6
Name: Robert
I wonder if forcing the forks to hangout where there are probably some nicks accelerates the wear/damage.

The best solution to all moto transport issues is a Baxley chock and loose-ish straps or a strapless restraint system like the Pitbull TRS.
__________________
BrotoGP Podcast and on Youtube
WERA #513 / AFM #513R / MotoAmerica #31
Follow me on IG @rwpierce13
Thanks to: RiderzLaw Vortex
stangmx13 is offline   Reply With Quote
Old 08-27-2020, 09:59 AM   #10
anytwowilldo
Veteran
 
anytwowilldo's Avatar
 
Contributor

Join Date: May 2012
Location: Sonoma County
Motorcycles: XR-400 (plated), KTM 525 (Plated), KTM 990 Adventure, Husky TE300, R1150RT
Name: Tom
Quote:
Originally Posted by thedub View Post
No, it doesn't. If you are at all familiar with the way oil seals are designed, it's obvious why not. Oil seals have a cavity on the oil side, so when the pressure builds up behind the seal it exerts more pressure on the sealing surface, which keeps the oil from being forced out. Your seals don't blow out when compressed, they just get better at sealing.
This video explains it better: https://youtu.be/Hy6cKKEdXB8?t=172

So why have you always heard that strapping your bike down will blow the seals? How did this often repeated and long standing rumor get started?

Strapping down a bike with good seals will not make them leak. But if the seal is already compromised, maybe there is a piece of grit in there, or maybe the lip is nicked or whatever, strapping it down with the forks compressed will force oil past the already bad seal.
If you arrive at your destination and there is a puddle of fork oil in the pickup bed, the incorrect conclusion you may draw is that tying the bike down is what caused the seals to leak, rather than revealing an already bad seal. Then you tell everyone on the internet and they tell everyone on the internet and here we are with a widely believed ongoing misconception.
+1

I created a fork seal leak on a dirt bike recently by allowing the clay on the fork tube to dry to concrete. It was behind the tube guard and I didn't see it. I then stuck it in a truck and cinched it down as usual, driving the baked clay up into the seal damaging it. I bought myself a couple hours work and a fork service.
__________________
Tom
anytwowilldo is offline   Reply With Quote
Old 08-27-2020, 06:49 PM   #11
OaklandF4i
Darwin's exception
 
OaklandF4i's Avatar
 
Founding Member
Barfie Winner 2017
Contributor ++++

Join Date: Feb 2002
Location: San Francisco and Lake County
Motorcycles: Triumph Street Triple, YZ250, TLR200, XR400R, Husqvarna CR390, ST1100 and couple more...
Name: CJ
Quote:
Originally Posted by thedub View Post
How did this often repeated and long standing rumor get started?
The Russians are CLEARly behind. Therefore, I am going to blame Dmitriy.

Its as old as sin, been hearing about it since I was a kid. But agree, legend and not true.
__________________
I'm looking for 1970 or older Triumph 650 project, cheap and preferably complete. PM me if you have something - will provide it a good home.

If you think me being naked is offensive, dont look!

"You find the biggest meanest bull, chop off his balls, dangle them in front of him, then hop on his back. That should give you some reference point. Either that, or shove a shuttle rocket up your ass. Take your pick." Colin Edwards

'Cycles is a mean toy lady" Big Halsy
OaklandF4i is offline   Reply With Quote
Old 08-28-2020, 08:33 AM   #12
afm199
Veteran
 
afm199's Avatar
 
Mod Alumni
Founding Member
Top Percent Poster
Contributor +++++++++ +++++++++++++++++3%

Join Date: Sep 2002
Location: Oaklamd
Motorcycles: Yamasuzhonaki 1450
Name: Mikezebub
Quote:
Originally Posted by stangmx13 View Post
I wonder if forcing the forks to hangout where there are probably some nicks accelerates the wear/damage.

The best solution to all moto transport issues is a Baxley chock and loose-ish straps or a strapless restraint system like the Pitbull TRS.
This.
__________________
That's not true! The lie is actually the truth! I know. Lots of people know this.
afm199 is offline   Reply With Quote
Old 08-28-2020, 09:02 AM   #13
m0t0_ryder
RYD!
 
m0t0_ryder's Avatar
 
Contributor +

Join Date: Apr 2003
Location: Cupertino
Motorcycles: Big to small. I like 'em all. 950ADVS-450EXC-R100GS-TW200-YW50P-XR600-Z1-ST90-model165Hummer
Name: John
Quote:
Originally Posted by Maddevill View Post
You can put one of those plastic supports or even a piece of 2x4 between the front tire and bottom tree. Tighten it down to your heart's content.

Mad
This is what I do.
Have a different 2x4 for each bike. Cut to a V shape on tire side.
A partial compress (w/o wooden/plastic blocks) can cause tie downs to slacken when you hit bumps. This can lead to the tie down coming unhooked at one end (or the other). It's happened to me... pre blocking the tires.

Quote:
Originally Posted by stangmx13 View Post
The best solution to all moto transport issues is a Baxley chock and loose-ish straps or a strapless restraint system like the Pitbull TRS.
Not possible on a hitch hauler.
And extra expense for moto trailers (i.e. Kendon) which already have wheel chocks.

I've also recently taken to placing a piece of wood over my rear tire when tying down as well when transporting. This after loosing a rear strap connection while travelling thru the horrible highways near Concord.
__________________
A gooD VoyagE Needs The Unexpected RoutE!
It didn’t look that far on the map.
Two wrongs don't make a right but three lefts do!
m0t0_ryder is offline   Reply With Quote
Old 08-28-2020, 01:49 PM   #14
OaklandF4i
Darwin's exception
 
OaklandF4i's Avatar
 
Founding Member
Barfie Winner 2017
Contributor ++++

Join Date: Feb 2002
Location: San Francisco and Lake County
Motorcycles: Triumph Street Triple, YZ250, TLR200, XR400R, Husqvarna CR390, ST1100 and couple more...
Name: CJ
Quote:
Originally Posted by m0t0_ryder View Post
This after loosing a rear strap connection while travelling thru the horrible highways near Concord.
I'm a big fan of retaining clip systems on tie down straps. Won't use anything but a strap with one. It took losing a bike more than once for me to learn.

And for those who won't let go of the exploding fork seal legend, allows you tie down the bike a little looser. Even on a red flexy flyer harbor freight folding death machine. Win win....

__________________
I'm looking for 1970 or older Triumph 650 project, cheap and preferably complete. PM me if you have something - will provide it a good home.

If you think me being naked is offensive, dont look!

"You find the biggest meanest bull, chop off his balls, dangle them in front of him, then hop on his back. That should give you some reference point. Either that, or shove a shuttle rocket up your ass. Take your pick." Colin Edwards

'Cycles is a mean toy lady" Big Halsy
OaklandF4i is offline   Reply With Quote
Old 08-28-2020, 02:25 PM   #15
kiwi_outdoors
Veteran
 
kiwi_outdoors's Avatar
 
1% Contributor

Join Date: Nov 2012
Location: Oakland, CA
Motorcycles: was a 2007 DL650A
Name: Tony
No

Quote:
Originally Posted by dravnx View Post
Does tightly strapping a bike on a trailer cause fork seals to blow out? I've always heard this but I don't understand why strapping a bike down would cause any more stress then actually riding it. I'm not talking strapping it down so the forks are fully depressed but enough to keep the bike from jumping around on the trailer.
No Nope Not Never on a trailer (assuming that you don not launch the trailer over a cliff)

Just buy a nice set of tie downs with capture clips on the hooks, and tie the forks down with a useful amount of compression, and trailer-on, dude!
kiwi_outdoors is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -8. The time now is 11:35 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.