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Forum |
Topics |
Posts |
Last Post |
Moderator(s) |
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 Motorcycle Safety
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General Discussion
This forum contains all general interest motorcycle safety oriented discussions. |
4619 |
59125 |
10/10/2018
11:12 AM
by: DataDan  |
Indiana Randy |
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Safety Gear
This site is pro ATGATT and here is where you can talk about safety gear to your heart's content. It is okay to mention specific brands by name, but it is NOT okay to post commercial messages here. That is, a member can promote what he likes based on experience, but a vendor cannot post a commercial here. |
172 |
1380 |
12/18/2017
5:23 PM
by: House_of_Dexter |
Axiom2000 |
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Rider Training Courses
MSF (and other) rider training courses. PROS and CONS. There is no bias here. No commercial postings allowed. |
338 |
5098 |
06/12/2018
9:12 PM
by: n/a |
Axiom2000, gymnast |
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Sharing of Lessons Learned
Every time we take our scooters for a ride we learn something. Share the knowledge here. |
985 |
11142 |
09/12/2018
10:20 AM
by: rkfire |
The Meromorph |
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Campfire chat
Here we tell the amusing things we usually talk about around the campfire after a day's ride. |
917 |
8187 |
08/03/2014
10:26 AM
by: rkfire |
Cash Anthony |
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Physics and the theoretical
Here we talk about hard facts - how the motorcycle actually works, physical dynamics, modeling of behavior, and maybe some 'what ifs' |
264 |
4060 |
07/24/2018
7:02 AM
by: scottrnelson |
James R. Davis |
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Aging and Disabilities
This forum provides an area to discuss the unique problems and coping mechanisms associated with aging and certain disabilities.
If you are too young to relate, it's just a matter of time. |
35 |
363 |
09/07/2018
12:00 PM
by: DataDan |
rayg50 |
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Technical/Maintenance
Questions and answers for those of you who like to do your own wrenching. If you're having problems with your bike, we're here to help! |
1319 |
10705 |
06/21/2016
12:56 AM
by: USMarine6173 |
greywolf |
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Contrary Opinions
Here is where you may voice your contrary (to my own) opinions so that others may read them. |
79 |
1864 |
06/21/2018
7:15 PM
by: Baggsy |
James R. Davis |
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Trip Reports
Members who wish to share their motorcycle trips with the rest of us are encouraged to do so here. Pictures welcome! |
251 |
1343 |
09/17/2018
10:28 AM
by: onthebeach |
Indiana Randy |
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Motorcycle Accident Reports - WITH COMMENTS
Here you may post reports of motorcycle accidents from whatever source you please - Newspaper, TV, YouTube, other boards - but along with posting a link to that source you MUST add value by providing comments about what the link is about, why you posted it and what you think we might learn from it. |
437 |
3071 |
08/31/2018
12:58 PM
by: rkfire |
dhalen32 |
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Roadcraft
Despite evidence to the contrary, the MSF approach to rider training is not 'all there is' or even 'the last word'. Here we can focus our attention on one such alternative body of training knowledge - one that is rather more intelligent and well considered than MSF's curriculum. England is the genesis. |
24 |
400 |
05/09/2012
1:27 PM
by: DannyC |
gymnast |
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Polls
This is the domicile of our polling messages. |
121 |
1668 |
08/31/2016
7:44 PM
by: rayg50 |
dhalen32 |
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| Wendy Moon Archive
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2005 Blog posts
These are the articles posted by Wendy in her blog during the year 2005. |
81 |
87 |
02/02/2011
4:34 PM
by: Moonrider |
James R. Davis |
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2006 Blog posts
Here you will find article posted by Wendy in her blog during the year 2006. |
24 |
24 |
02/05/2011
3:18 PM
by: Moonrider |
James R. Davis |
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2007 Blog posts
Here you will find posts made by Wendy in her blog during the year 2007. |
9 |
9 |
02/06/2011
2:15 PM
by: Moonrider |
James R. Davis |
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2008 Blog posts
Here you will find posts made by Wendy in her blog during the year 2008. |
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6 |
02/08/2011
3:19 PM
by: Moonrider |
James R. Davis |
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2009 Blog posts
Here you will find posts made by Wendy in her blog during the year 2009. |
94 |
95 |
03/01/2011
10:58 AM
by: Moonrider |
James R. Davis |
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2010 Blog posts
Here you will find posts made by Wendy in her blog during the year 2010. |
30 |
30 |
03/04/2011
2:38 PM
by: Moonrider |
James R. Davis |
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Motorcycle Consumer News Articles
Here you will find in pdf format articles Wendy published in the Motorcycle Consumer News magazine. |
6 |
6 |
01/31/2011
10:13 AM
by: Moonrider |
James R. Davis |
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Wendy Moon Obituary
Here you will find the obituary notice regarding Wendy's demise. |
1 |
6 |
06/02/2013
10:36 PM
by: aidanspa |
James R. Davis |
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| How To ...
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Buying a used bike - is this a good deal?
Here is a forum in which you can ask for and discuss used bike purchase questions like: Is the price reasonable? What else should I ask for? Can the seller REALLY have just installed a NEW stator on this 28 year old bike I'm thinking of buying?
What this forum is NOT for is listing YOUR bike for sale. |
12 |
95 |
11/12/2013
9:44 PM
by: kacinpa |
Indiana Randy |
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Add-ons / Customization
Want to make your bike a little different from the next guy's? You might find in this forum how our other members tackled the nitty gritty of making those changes. |
111 |
628 |
07/26/2014
7:46 PM
by: SkootchNC |
Axiom2000 |
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Improve your skills
Yep, parking lot practice is fundamental. But some of you have found other ways and may be willing to share here.
NOTE: The first time somebody posts a HOW TO DO A WHEELIE OR STOPPIE post this forum goes away. |
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907 |
07/01/2014
11:04 AM
by: MotoGG |
dhalen32 |
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Preventative Maintenance
Some kinds of maintenance (most, actually) should be done by trained professionals. But there are lots of things you can do for yourself. Here you can share the how to's with our other members. |
33 |
261 |
08/19/2013
9:53 AM
by: rkfire |
greywolf |
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| Off Theme
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Bitcoins
A new form of currency that can make a significant difference to how you buy and sell goods and services - or invest!
In this forum we discuss what it's all about, how to get involved, and how to use Bitcoins for commerce and investments. |
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31 |
11/21/2017
9:35 AM
by: JanK |
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The Get Your Motor Running Chat Forum
This is an area for non-safety related posts that are neither political or humorous in content. Robust discussion, digression and expression is encouraged. Come on in as the water is fine.
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469 |
3987 |
07/14/2014
10:36 PM
by: AaronC |
rayg50 |
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New Member's Corner
Members only
Our newest members have a place to hang until they get comfortable with the board and the old salts who frequent it. Here you may introduce yourself, tell us a bit about yourself and your interest in motorcycling, and ask questions about how to get around (and along) in this large site. |
561 |
3180 |
08/06/2015
7:22 AM
by: commonground |
Cash Anthony |
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Birthday Wishes - (Mature Themed)
Members only
A Place to Acknowledge and Celebrate that Special Day in a Member's Life. Open at your Own Risque. |
190 |
616 |
12/01/2013
9:00 PM
by: aidanspa |
Axiom2000 |
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Humor ... the lighter side
This is the place to share a bit of humor.
Good taste and courtesy, please. |
914 |
2483 |
03/15/2015
3:01 PM
by: gymnast |
Cash Anthony |
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Puzzles and Games
Here we make room and time for diversions of the mind. |
50 |
304 |
07/12/2013
12:58 PM
by: aidanspa |
James R. Davis |
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Event Announcements
You may post announcements of benefit and other events here. Stale posts will be removed for you. |
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* Today *
2:23 PM |
James R. Davis |
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Acknowledgements
Let's hear about your "attaboys," wherever they come from. |
10 |
30 |
12/02/2013
3:51 PM
by: greywolf |
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| Odds and Ends
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Build
Post construction |
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* Today *
2:23 PM |
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Subscriptions
How to remain current on message content here without having to connect to the forum. A real time saver for all of us. |
1 |
1 |
02/05/2004
2:20 AM
by: James R. Davis |
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Testing place
Here you can try out various board functions without being concerned that you might adulterate other areas of the board. I will clean this forum out from time to time so you should NOT expect your messages to last long here. |
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10 |
11/18/2017
4:32 PM
by: scottrnelson |
Cash Anthony, Indiana Randy, James R. Davis |
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Glossary
A list of specialized words, phrases, and abbreviations found within the motorcycling community along with their definitions. |
173 |
173 |
02/03/2011
5:11 PM
by: James R. Davis |
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Board Enhancements or Problems
This forum will be used to discuss enhancements and problems that need attention. |
85 |
484 |
03/30/2018
9:40 AM
by: scottrnelson |
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How to use the forum
Here you will find discussions on how to use this forum with suggestions on getting started and best practices. |
34 |
99 |
06/15/2011
9:30 AM
by: scottrnelson |
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 Questions & Answers
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| Links
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From Cash's Closet
This is Cash's eStore from which you can purchase our book (Motorcycle Safety and Dynamics) among others and hand-crafted jewelry along with other fine gifts. |
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| Models
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Attack Angle Constant Radius Calculator
If you are making a turn and encounter an obstacle, you can determine what the maximum attack angle your bike will achieve given you can determine the radius of the turn, and how far you travel in a vertical and horizontal distance from the start of the curve using this calculator. |
1 |
1 |
03/03/2012
6:36 PM
by: James R. Davis |
James R. Davis |
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Average Deceleration Rate Calculator
Though not an excel model, this chart provides you the ability to directly determine the average deceleration rate during a quick stop when you have the speed traveled when braking began and the distance taken to bring the bike to a complete stop. |
1 |
1 |
11/24/2010
9:32 AM
by: James R. Davis |
James R. Davis |
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Average Deceration Rate From Max Rate and Squeeze Time
Assuming that you have been practicing quick stops during your parking lot practice sessions, you have determined your average rate of deceleration during those efforts by measuring the distance needed to stop and knowing how fast you were going when you started braking. You even found out what your maximum deceleration rate was given that you could estimate your 'squeeze time'. This model will tell you your average deceleration rate at any higher starting speed given the same squeeze time and maximum deceleration rate. |
1 |
1 |
05/08/2012
1:26 PM
by: James R. Davis |
James R. Davis |
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Bike Weight by Latitude
This calculator provides you the ability to determine your bike's weight given you know what it's mass is and where it's located on the earth (latitude and altitude). |
1 |
1 |
07/03/2012
11:11 PM
by: James R. Davis |
James R. Davis |
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Distance To Avoid Calculator
Ever wondered how long it would take you to change lanes at a given speed, or how much distance your motorcycle would travel (how much distance you NEED) in order to swerve to the left or right a given number of feet at a particular speed, or how aggressively you need to change directions to avoid hitting something in the road? This calculator will give you the answers. |
1 |
1 |
03/03/2012
5:00 PM
by: James R. Davis |
James R. Davis |
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Effective Steering Angle Calculator
The amount of rotation you provide your handlebar is not the same as the amount of turning your bike will do. That is, your steering angle is not the angle your motorcycle changes direction by. The effective steering angle is a function of your head steering angle, your rake angle, and the lean angle of the bike. This calculator will compute the effective steering angle from those inputs. |
1 |
1 |
03/03/2012
6:05 PM
by: James R. Davis |
James R. Davis |
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Impact Speed
Some of the simplest models can enlighten us with solutions to difficult problems. This model can be used to determine how fast you will hit the ground and how long it will take to strike the ground given the distance fallen. Maybe more importantly, let's say a student pops her clutch with a 1/4 throttle application and she travels 40 feet before running into a concrete lamp pole. Assuming that 1/4 throttle generates an acceleration rate of 0.4g's (or whatever you wish), this model will tell you how fast she was going at the time of the crash and how long it took. |
1 |
1 |
04/14/2013
10:01 PM
by: James R. Davis |
James R. Davis |
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Kinetic Energy
The energy of motion. When an object has motion, it has energy. Just how much is a function of its mass and its speed (squared). This model will quantify that energy for you. |
1 |
1 |
04/15/2013
12:03 AM
by: James R. Davis |
James R. Davis |
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Lateral Acceleration From Lean Angle
Simple conversion program that translates any given lean angle into the lateral acceleration (expressed in g's) that MUST correspond. |
1 |
1 |
03/03/2012
5:47 PM
by: James R. Davis |
James R. Davis |
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Lateral Movement Constant Radius
You are riding on a circular path with a constant radius. If you suddenly lost traction, your bike would travel in a straight line that is a tangent to the path you were riding. If you maintained your speed and knew how far you traveled in that straight line, how far would you be from the path you were originally traveling?
Or, while remaining on your original circular path, how far do you move laterally if you know how far you moved longitudinally?
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1 |
1 |
03/03/2012
6:27 PM
by: James R. Davis |
James R. Davis |
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Lean Angle From Lateral Acceleration
Simple conversion program that translates any given Lateral Acceleration (expressed in g's) into the lean angle that MUST correspond. |
1 |
1 |
03/03/2012
5:52 PM
by: James R. Davis |
James R. Davis |
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Longitudinal Movement Constant Radius
This calculator will provide you the longitudinal distance traveled if you know both the lateral distance and length of radius when you are riding in a circular path at constant speed. |
1 |
1 |
03/03/2012
6:50 PM
by: James R. Davis |
James R. Davis |
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Maximum Lateral Movement
Ever wondered how far you could veer to the left or right in a given distance? You would need to know how much distance you had in front of you and how aggressively you steered. This model will do the calculations for you. |
1 |
1 |
01/14/2012
12:26 PM
by: James R. Davis |
James R. Davis |
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Segment (arc) Length Calculator
When traveling between two points along the circumference of a circle, given the central angle and radius of that path, this calculator will determines the actual distance traveled. |
1 |
1 |
03/03/2012
6:54 PM
by: James R. Davis |
James R. Davis |
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Squeeze Time Effect On Max Deceleration
The amount of time it takes you to reach your maximum deceleration rate (your squeeze time) affects the maximum deceleration rate you must achieve in order to average a given deceleration rate. This calculator shows you exactly how much. |
1 |
1 |
05/02/2012
10:36 AM
by: James R. Davis |
James R. Davis |
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Traction Demand
In order to determine whether your bike will skid or slide, you need to know what the Static Coefficient of Friction is between the tires and roadway as well as the braking and cornering forces that put a demand on traction. Since braking forces are perpendicular (orthogonal), they do not simply add - you must combine them. This simple model demonstrates these facts and gives you a close approximation of total traction demand as compared to the total available traction. |
1 |
1 |
05/09/2012
2:03 PM
by: James R. Davis |
James R. Davis |
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Trail
There are two trail measurements: Ground and Mechanical(Real).
This calculator will tell you how long each is given the rake angle, offset, and wheel radius. |
1 |
1 |
03/03/2012
5:59 PM
by: James R. Davis |
James R. Davis |
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Deceleration Rate From Speed and Stopping Distance
Given the starting speed and distance to stop, this model calculates the deceleration Rate employed. |
1 |
1 |
09/09/2010
1:36 PM
by: James R. Davis |
James R. Davis |
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Stopping Distance From Speed and Deceleration Rate
Given the starting speed and deceleration rate, this model calculates the stopping distance. |
1 |
1 |
09/09/2010
1:43 PM
by: James R. Davis |
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Speed From Stopping Distance Calculator
Used to compute how fast a vehicle is traveling at the start of a known stopping distance. It assumes that all braking is done with a constant deceleration rate (such as would generally be the case if skidding). It also allows you to include PDR (Perception-Decision-Reaction) time, if any. |
1 |
1 |
06/19/2008
9:58 AM
by: James R. Davis |
James R. Davis |
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Stopping Distance Calculator
This model calculates the fastest possible non-skid stop time and distance given Speed, Grade, Coefficient of Friction, and Braking Efficiency. It also calculates the maximum decelerate rate possible given the height of the CG, length of Wheelbase, and weight distribution. |
1 |
1 |
02/02/2007
3:08 PM
by: James R. Davis |
James R. Davis |
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Speed Scrubbed During Skid
It is not intuitive, but skid marks do not represent speed. Instead, they represent energy transformation. That is, they represent the amount of kinetic energy that was converted to heat. This model calculates the amount of speed that is scrubbed during a skid based on the starting speed and drag factors. |
1 |
1 |
12/13/2009
11:27 AM
by: James R. Davis |
James R. Davis |
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Critical Speed Calculator
This model calculates the speed at which a vehicle will lose traction given the radius of a curve and the Coefficient of Friction of the roadway. This is usually called the 'Critical Speed'. |
1 |
1 |
05/27/2008
11:38 PM
by: James R. Davis |
James R. Davis |
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Distance traveled and Speed after braking using Decel rate
This model allows you to specify your starting speed, deceleration rate, and length of braking time in order to determine how much distance was taken and what the current speed is after that braking time elapses. |
1 |
2 |
10/13/2010
6:04 PM
by: TonicBIA |
James R. Davis |
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Lateral Acceleration & Lean Calculator
Given the radius of a turn and the speed of the motorcycle, this model calculates what the lateral acceleration and lean angle of the bike will be. |
1 |
1 |
05/27/2008
11:34 PM
by: James R. Davis |
James R. Davis |
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Quadratic Equation Solver
Whenever you can reduce an equation so that it takes on the following standard form:
Ax2 + Bx + C = 0
then you can use the quadratic equation solver to solve it. Note, there are ALWAYS two correct solutions for x! |
1 |
2 |
05/29/2008
5:18 PM
by: James R. Davis |
James R. Davis |
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Radius Calculator
This simple model allows you to calculate the radius of a curve given the length of a chord and its middle ordinate. |
1 |
1 |
05/27/2008
8:54 PM
by: James R. Davis |
James R. Davis |
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Skid Distance To Stop
Sometimes you just want to calculate how long a skid mark will be given a starting speed, the Drag factor components, and the assumption that you come to a complete stop without falling over or colliding with something. |
1 |
1 |
12/13/2009
10:09 AM
by: James R. Davis |
James R. Davis |
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Vault Speed Calculator
This model will calculate the speed an object (such as a motorcyclist) is launched at (in other words, the motorcyclist's speed at time of impact) given you know how far it is thrown, the difference in height between launch point and impact point, and the launch angle. |
1 |
1 |
06/18/2008
12:01 PM
by: James R. Davis |
James R. Davis |
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Center of Gravity Calculator
This model calculates the location of your Center of Gravity given as input the measured results of lifting the rear wheel off the ground. |
1 |
1 |
02/02/2007
3:35 PM
by: James R. Davis |
James R. Davis |
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Lean Angle Calculator
This Excel spreadsheet will calculate the lean angle of the CG of your bike and the lean angle of the combined rider and bike CG given nine different input specifications. Finally, it provides a graph of lateral forces divided by vertical loads based on acceleration rates (if any) so that you can estimate when traction would be lost. |
1 |
1 |
02/02/2007
3:43 PM
by: James R. Davis |
James R. Davis |
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Skid Mark Analyzer
This model calculates minimum speed at the time brakes were applied given the input of skid length, Coefficient of Friction, Grade, Braking efficiency, Collision speed (if any), surface moisture (if any), and Transient Braking Time. |
1 |
1 |
02/02/2007
2:49 PM
by: James R. Davis |
James R. Davis |
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Speed by Gear Calculator
This simple model calculates your motorcycle speed given the rear tire radius, final gear ratio, and engine RPM. Note that though you have to input seven values with this model, if you merely combined this model with two others (Rear Wheel Radius, and Gearing) you wouldn't need to enter anything. |
1 |
1 |
02/04/2007
2:23 PM
by: James R. Davis |
James R. Davis |
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Rear Wheel Radius Calculator
This simple model converts the specification of your rear tire into the radius of the rear wheel. (This is necessary in order to convert wheel RPM into motorcycle speed.) |
1 |
1 |
02/03/2007
10:50 PM
by: James R. Davis |
James R. Davis |
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Horsepower Calculator
This simple model calculates your engine's horsepower given its RPM and Torque as input. |
1 |
1 |
02/03/2007
11:26 AM
by: James R. Davis |
James R. Davis |
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Gearing Calculator
This model computes the final gear and final drive ratios given the gear tooth counts for Primary Drive, 1st through 6th, and Final Drive as input. |
1 |
1 |
02/03/2007
11:18 AM
by: James R. Davis |
James R. Davis |
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Drag and Lift Calculator
This model calculates the weight on the front and rear tires resulting from virtually all variables that could affect them in a dynamic state. In particular, you will provide static state configuration information then add such variables as Latitude, Altitude, Wind speed, and Temperature. |
1 |
1 |
02/02/2007
3:20 PM
by: James R. Davis |
James R. Davis |
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| Statistics |
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3,001 of 5,773 (51%) Members have made 126,356 posts in 93 forums, with the last post on 10/10/2018 11:12 AM by: DataDan. |
| Posting members who have Mentor = 57 (1%), POSITIVE Karma = 428 (14%), NEGATIVE Karma = 57 (1%) |
| Posting members who have provided Peer Review votes = 366. Voting mostly POSITIVE = 319. Voting mostly NEGATIVE = 32 |
| There are currently 12,897 topics. |
| There are 114 polls (0 now open) and there were 16,304 ballots received. |
| Please welcome our newest member: MicMac. |
Birthdays |
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Upcoming: Sam (Oct 18), BakerBike (Oct 18), BC KLR650 (Oct 18), DblAA (Oct 18), chuck3 (Oct 18), DAJAY (Oct 18), Biker Medic (Oct 18), acourson (Oct 18), magan09 (Oct 18), rex steele (Oct 18), boogybren (Oct 19), AMase (Oct 19), Shaine (Oct 19), bammer (Oct 19), JSTEVEN2 (Oct 19), libragirl (Oct 19), BoxTops (Oct 19), dethmaul (Oct 19), speedsville (Oct 19), actarus (Oct 20), JohnG (Oct 20), USMCAmmoMan (Oct 20), Nobody (Oct 20), Gary856 (Oct 20), csr_xl1200l_ (Oct 20), mstevens (Oct 21), Texasphotographer (Oct 21), halosavage (Oct 21), jonw9 (Oct 21), Murph (Oct 21), jimbo (Oct 22), shadowrider (Oct 22), tank (Oct 22), johnmurray (Oct 22), T_dawg09 (Oct 22), hawgster (Oct 22), susie.charley@gmail.com (Oct 22), Life on 2 wheels (Oct 22), madjack (Oct 23), DahleeMama (Oct 23), sld1971 (Oct 23), Slammed Low (Oct 23), rcwest (Oct 23), Selvation (Oct 23), billmiranda (Oct 23), Clif @ DPS MSU (Oct 24), kathy (Oct 24), fidhle (Oct 24), brownch79 (Oct 24), rgwtrike (Oct 24), vaharleybob (Oct 24), clspon (Oct 24), karellacharite (Oct 24). |
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