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Old 06-02-2011, 07:08 PM   #181
NortwestRider
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Old 06-20-2011, 07:28 AM   #182
leejosepho
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Quote:
Originally Posted by koifarm View Post
Getback,
We are glad that you posted that, please don't stop posting good info since we all may need that input to resolve a problem or just to find out more about what we are doing....

Keep on posting the good stuff, it's gonna help someone ...
You must be a prophet, Koi! This thread is one of the first sources I found when I began my personal research just a few days ago, and I am finding it indispensable.

Much appreciation to you, Getback.
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Old 06-24-2011, 09:00 PM   #183
lethal_le
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Leading link forks

Hi, Has anyone got drawnings for a set of leading link front forks to use on a road going sidecar? I welcomb any help thanks.
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Old 06-25-2011, 03:00 PM   #184
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Old 06-27-2011, 12:27 AM   #185
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Laugh Leading link forks

HI I have 2 bikes 1971 BSA Lighting A65 & 1999 FXD Harley the Harley is almost finish so it would be the first.
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Old 07-02-2011, 09:35 AM   #186
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Originally Posted by lethal_le View Post
Hi, Has anyone got drawings for a set of leading link front forks to use on a road going sidecar? I welcome any help thanks.
If you are planning to do your own fabrication, I think this kind of approach would be much simpler for reducing trail ...

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Old 07-02-2011, 11:02 AM   #187
Kyler
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Tony Foale has some great pics of racing sidecar suspension

https://picasaweb.google.com/1137499...76003/Sidecars
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Old 10-03-2011, 02:03 PM   #188
Barnone
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These old sidecars did not have any lead. How did they handle?
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Old 10-05-2011, 05:29 AM   #189
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Quote:
Originally Posted by Barnone View Post

These old sidecars did not have any lead. How did they handle?
Wheel lead came more into play when rigid rear suspensions on the bikes began to dissapear.
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Old 10-05-2011, 05:56 AM   #190
Barnone
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Quote:
Originally Posted by claude View Post
Wheel lead came more into play when rigid rear suspensions on the bikes began to dissapear.
Claude,
Thanks for the reply. I asked because I have a hardtail bobber that I am thinking about adding a sidecar on and was wondering about the lack of lead on the old hacks.
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Old 10-05-2011, 05:44 PM   #191
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No lead

I'm driving a recently assembled BMW R80/7 with a Dnepr car and stock tele front end. I put wide GS bars on and I keep the tire pressure up to 30-32lbs all the way around and I don't find it hard to steer at all. With a passenger I have to hang off a bit in lefts to help swing the car around, but it hasn't left me with sore arms or anything.

If you're on a budget, try it stock first and see how it goes before you start dropping serious dough on modified front ends or leading links. My $.02, of course, YMMV, etc.
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Old 10-06-2011, 05:36 AM   #192
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Quote:
Originally Posted by Barnone View Post
Claude,
Thanks for the reply. I asked because I have a hardtail bobber that I am thinking about adding a sidecar on and was wondering about the lack of lead on the old hacks.
Gotcha. I would still personally recomend some wheel lead for stability even if minimal If you make your mounts right you can adjust the lead to suit as you get some seat time with your outfit.
Think of lead this way..... This is a 'stretch' but it may get the point across...
A three wheeled car with no right front wheel would steer easily but would tip down on the right front even at rest.Left turns would be impossible
A three wheeled car with only a left rear wheel and two front wheels of which only the left front steered. It would be a bear to steer.
Now move the right rear wheel forward in example number one and a compromise that works can be had. In example number two move the right front wheel back to get a compromise that works.
So, the less lead we have the less stability we have in turns away from the sidecar.
The more lead we have the more stability we have in turns away from the sidecar at the expense of harder steering and usually more tire wear.
Other factors come into play such as track width. Wheelbase , suspension, snatiswaybar (or not) etc etc.
When it all comes down to the wire what is best lead wise will depend on what works best for you and your type of driving style while keeping safety in mind for those pucker moments that can happen when bambi decides to cross the road with out doing a stop look and listen routine.
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Old 10-07-2011, 06:25 AM   #193
Barnone
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Claude,
Thanks for the explanation on lead. Makes a lot more sense to this sidecar newbie. Going to take a look at a Ural in a few minutes.
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Old 10-18-2011, 06:46 AM   #194
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Track Width R.O.T.

Hey there collected wisdom...
I have read several treatises on setting a starting point for lead, and am going to start at the recommended 15-20% of bike wheelbase. Since I am fabricating my own subframe/frame combo, I am not interested in making a lot of adjustability bracketry, clamps, and points of failure, so I want to design in, as close as possible, the basics. Using only threaded collars as the fine tuning, I would like to start within a few inches of final setup.
That said, I also would like to be within 40-48" of track width on a bike with a 63-ish inch wheelbase. I'd like to keep it narrow, as I will be riding ATV tracks, mountain and logging roads as much as streets...but I also want it to be relatively stable at highway speeds.
Is there any rule of thumb for this? I have seen 75% of wheelbase as a R.O.T., which puts me right at the 48", which would also fit neatly on my homebuilt trailer...
Thanks!
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Old 01-29-2012, 08:27 AM   #195
Sidecarjohn
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Question Rear Suspension on a BMW K ?

I'm in the process of changing the rear suspension unit on the K outfit because the one current one is way too soft.

I've received some good advice already from a number of inmates, but as I finalise my change I'd like to clarify what spring strengths are out there on similar bike rear end set ups, i.e. BMW single shock, or even other single shock arrangements on other bikes.

Have found some information already around ADV, much of it contained within threads that primarily deal with other issues, but it seemed a good idea to try and gather this in one location.

Anything you have appreciated in any units, e.g. lbs/inches, or the metric versions.
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