How can I measure my lean angle? - Steve Saunders Goldwing Forums

Closed Thread
 
LinkBack Thread Tools
post #1 of 27 (permalink) Old 01-30-2012, 06:43 PM Thread Starter
Junior Member
 
Dimond100's Avatar
 
Join Date: Sep 2011
Location: San Francisco, California, USA
Posts: 20
Post imported post

Being a very conservative rider I do not lean much; however, I also have no idea how far I actually do lean. So, how can I measure my lean angle? I thought of some type of an inclinometer - but the physics of how they work may prevent that (http://www.advrider.com/forums/showthread.php?t=539596). Another site suggested an iPhone coupled with TiltmeterPro application (http://www.zx-10r.net/forum/showthre...t=77157&page=2). This issue is far more complicated than I had originally thought it would be. Any suggestions on how 'lean angle' could be measured? Thanks.

1990 GL1500
2003 SilverWing
Dimond100 is offline  
Sponsored Links
Advertisement
 
post #2 of 27 (permalink) Old 01-30-2012, 06:48 PM
Member
 
Rebel Girl's Avatar
 
Join Date: Nov 2010
Location: Ravenel, South Carolina, USA
Year: 1986
Make: Honda VT700 Shadow
Posts: 239
Post imported post

I usually lean as far as I can without falling over. LOL Honestly, don't know how to measure that but what you can do is look at the videos on You Tube and see how far some of them look like they're leaning. May not be a measurement but should give you some idea.

Rebel Girl (Pat)

03 VLX 600 Shadow
83 GL1100 Interstate(hubby\'s)
450 Rebel
250 Rebel
90cc Kawasaki
Rebel Girl is offline  
post #3 of 27 (permalink) Old 01-30-2012, 06:59 PM
Senior Member
 
unionjk's Avatar
 
Join Date: Jan 2010
Location: Oceanside, California, USA
Posts: 3,303
Post imported post

Above 10 mph you should lean more than the bike does, then when you hear the metal parts scraping you know you are leaning far enough.

Below 10mph counter lean and push the bike over, same thing applies to the scraping hard parts though.

If you never hear the hard parts touch then you are not leaning over all the way.

'RIDE TO BE SEEN'

Most common quote from a cager after killing a motorcyclist is?

"I never saw him".
unionjk is offline  
Sponsored Links
Advertisement
 
post #4 of 27 (permalink) Old 01-30-2012, 07:15 PM
Senior Something
 
ebanjo's Avatar
 
Join Date: Dec 2008
Location: Palmdale, California
Year: 1979
Make: Honda
Model: GL 1000
Posts: 13,221
Garage
Post imported post

You could use a bubble level.

Happy Trails







My pic's

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
ebanjo is offline  
post #5 of 27 (permalink) Old 01-30-2012, 07:25 PM
Senior Member
 
nobbie's Avatar
 
Join Date: Mar 2007
Location: Toronto, Ontario, Canada
Model: GL1500SE
Posts: 5,376
Post imported post

Yours is a good question. Even a conservative rider needs to know how far he can push things in an emergency.

I'm not sure if this applies to you but overly cautious riders have gone off the road on curves they could have handled with the appropriate lean.

Riding with a mentor who takes you slowly up the learning curve is one option. A turn and bank indicator is another option but comes with a problem. You have to take your eyes off the road to use it.

Len
___________________________
True friends do not urge you on from the sidelines. They march with you.
They are warriors, not cheerleaders.
nobbie is offline  
post #6 of 27 (permalink) Old 01-30-2012, 08:10 PM
Senior Member
 
Wolfman's Avatar
 
Join Date: Jan 2008
Location: Virginia Beach, Virginia, USA
Model: GL1500SE
Posts: 14,148
Post imported post

the problem with a bubble level or other gravity operated lean angle type device, is that gravity is counter-acted by centrifugal force in the turn. This is the physics involved in turning a two-wheeled vehicle. The two forces are equal and opposite. So your lean indicator would indicate zero.



You might try to mount a camera on the bike and take a video of your lean, and then measure the resultant angle on the computer screen.



But that's the only idea I can come up with.





Jim

Beware, I'm a known thread hijacker.

'96 GL1500 SE
Honda Riders of Tidewater -- Former Chapter President

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My personal webpage:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Desert Storm Veteran USS Pensacola (LSD-38)
Wolfman is offline  
post #7 of 27 (permalink) Old 01-30-2012, 08:12 PM
Senior Member
 
JackfromCT's Avatar
 
Join Date: Jun 2010
Location: Hartford Area, Connecticut, USA
Posts: 551
Post imported post

Years ago, I'd scrape the floorboards and right the bike in panic. Now, if I don't scrape the pegs in the turns, I'm very disappointed. Lean it until you can hear it. Trust me, you'll grow to like that sound. Otherwise, there are a few clinometers on the market that should accurately measure the lean angle.
JackfromCT is offline  
post #8 of 27 (permalink) Old 01-30-2012, 08:17 PM
Banned
 
Join Date: Jul 2009
Location: Silo'd in SD, USA
Posts: 12,287
Post imported post

A simple way to get some measure is to do this:

You'll need:

A small plastic protractor
Some lightweight fishing line
A fishing weight (sinker type, 'bout one ounce)
A black permanent marker (Sharpie works)
A length of wood dowel to span handlebars
Duct tape
Razor blade

Bike on center stand and level.

Cut the dowel so it will span your handlebars with the ends running about an inch over on each side in a spot that leaves the dowel sitting level. each bike is different. Tape the dowel in place.

Find the center of the dowel and mark it with the marker. Center the protractor to the mark with the straight, flat side against the dowel and tape just the ends to the dowel. So far, everything is temporarily in place.

Use the razor blade and cut open the marker. Inside will be the felt material used to flow the markers fluid. Careful, it's messy. Cut a small section appx 1" long and about 1/16" wide from it. This is your new wiper.

Take a length of fishing line and tie a knot to one end of the wiper, wrapping about 3/4" of the remainder a few times and tie another knot at the other end. You should be able to hold the line taught with the wiper in-line with the fishing line. Tie the weight about two inches down from the wiper.

The protractor has a embossed side with raised marks of graduation. Don't use this side, use the smooth side to face you as you sit on the bike. Flip it over if need be. From the center mark, position the wiper at the bottom edge of the arc so that it stays in the middle and tape the fishing line in place. A couple of wraps of the line around the dowel and protracror is a good idea before taping it down.

Now, don't move this thing around too much. Once it's in position it will mark the protractor before you start riding.

Finally, adjust the dowel so that the protracter has about 5 degrees forward (or positive)tilt, giving the bottom about 5 degrees negative (or rearward) tilt and supplying just a bit of constatnt force for the wiper to stay on the plastic. Maybe more depending on your riding style.

Go ride. When done, transfer your off-center marks into degrees of tilt for the ride you just took.

Feel free to improvise the above. Some people (ie: cheap-a$$ed racers) get pretty fancy with the basic above idea. If you plan on doing some testing, use clear celophane tape on the protractor, it'll become reusable and you put the marked tape into a logbook with notation, ...or whatever...

In a cage, some measure of g-force can be calculated using the same set-up with more accuracy than one might expect. Construction technique is key with this idea.


CaptainMidnight85 is offline  
post #9 of 27 (permalink) Old 01-30-2012, 08:47 PM
Junior Grue
 
Ken Bergen's Avatar
 
Join Date: Jun 2010
Location: Chilliwack, British Columbia, Canada
Model: 1984 Interstate "Canadian"
Posts: 8,131
Post imported post

As Wolfman said, with any inclinometer bubble or pendulum if it doesn't show you as being upright in a curve on a bike you've fallen down.



Advise given here is free and comes with no warranty "Caveat emptor"

Ken.
Ken Bergen is offline  
post #10 of 27 (permalink) Old 01-30-2012, 09:03 PM
Senior Member
 
keithg64's Avatar
 
Join Date: Apr 2006
Location: Geneseo, Illinois, USA
Model: GL1500SE
Posts: 1,224
Garage
Post imported post

Your tires will show you how far your leaning the bike by a wear width. You could, with the help of friends, is lean the bike over in the driveway till your at the edge of your tire wear and measure the angle your bike is at.

It\'s not what you buy, it\'s what you build.

Victory Riders CMA Road Captain:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Illinios Chapter Wild Rinos Member
keithg64 is offline  
Closed Thread

  Steve Saunders Goldwing Forums > Forums > Goldwing Technical Forum

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Steve Saunders Goldwing Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Maximum lean angle of a KLR Stinky151 General Motorcycle Discussion Forum 5 05-09-2011 06:53 PM
Who's got a tape measure? Guntec General Motorcycle Discussion Forum 3 12-12-2010 05:41 PM
The tape measure master UbarW Fun Forum 2 12-22-2009 01:27 AM
Where do I measure my windshield? jeffo Goldwing Technical Forum 3 07-12-2009 12:20 PM
Lean angle sensor? superhawk1022 Goldwing Technical Forum 6 06-19-2009 11:48 AM

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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome