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Thread: lean in vs lean out

  1. #1
    slowrider
    Join Date
    Sep 2008
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    lean in vs lean out

    I'm getting ready to mount a sidecar on an HD ( I know its not a BMW but my GS is watching the procedure ) the Hd manual says to use 1 degree of lean in on the bike and the yellow book states up to 2 degrees of lean out. Can any one tell me what works best or is it all trial and error.

  2. #2
    Jack Ethridge
    Join Date
    Aug 2006
    Location
    Ocala Fl
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    Here is how I set lean on my rig. I attached a small RV level in the center of the handle bar. I loaded the side car as I intended to ridg. I set on the bike. At this point the level buble should be to the right of the line about 1/2 the buble. When on the road the road crown should bring to buble back to the center. You want to fiddle with untill the buble is in the center MOST OF THE TIME.

    Jack Ethridge
    Ocala Fl
    jethridge4@cox.net

  3. #3
    Curmudgeon At Large Bobmws's Avatar
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    I'd post your question on the Hacks forum on ADVRider. Lots of very experienced folks there willing to help.
    Bob Weis
    '04 K12RS - Hannigan Hack
    www.earplugco.com

  4. #4
    Registered User
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    Apr 2005
    Location
    Kansas
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    232

    Harley Car?

    If you are mounting a Harley car on a harley bike follow the Harley instructions as the starting point. The Harley car has no suspention. They are expecting that the rider is going to load the bike suspention and there will be a resulting leanout. That is, the bike will sag but the car will not. If you are mounting a car with suspention start with some leanout. I use a magnetic angle finder on the rear brake rotor. Harold in Kansas
    Harold In Kansas
    1985 K100RT Bullit
    1985 K100XX/EML Bemel

  5. #5
    slowrider
    Join Date
    Sep 2008
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    Talked to some hack riders at a rally this past weekend and got several different opinions, general consenses was to end up with the bike being vertical under rider and passenger load on a normal road crown.

  6. #6
    SIDECARGUY
    Guest

    lean out - lean in - the proper term is camber

    The proper term is camber. In laymans terms that is when top of the wheels are leaned away or towards each other. If you lean the tires towards each other at the top that would be negative camber or lean in. In this configuration the wheels will be fighting towards each other trying to push each other. When the tires are leaned away from each other at the top that would be positive camber or lean out. In this position the wheels are compensating for the crown of the road.
    This is where it gets tricky. You as a rider must find the best positive camber / lean out to compensate for the road crown and your weight load on the bike and sidecar. The road crown changes on every road and every few hundred feet. As previously posted the Harley book recomends lean in. This is why so many Harley riders complain about the pull to the right. The bike needs to compensate for the crown and that determines how much positive camber / lean out you require.
    Harley dealers for the most part will setup according to the book. Some will tell you who the local expert is if you want that issue dealt with.
    Last edited by SIDECARGUY; 09-26-2011 at 11:54 AM.

  7. #7
    Registered User f14rio's Avatar
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    my rig , a bonnie with a cosy

    wants to drift right most of the time. so many variables ....its tough to adjust camber without affecting toe in. i think this stuff is an acquired skill. need a lot of patience. getting there, though. i do stick a 50 lb bag of sand from home depot in the car when nobody's in there.


    ..
    "Enemy fighters at 2 o'clock!...Roger, What should i do until then?"

    2010 r1200r, 2009 harley crossbones, 2008 triumph/sidecar, 1970 norton commando 750

  8. #8
    SIDECARGUY
    Guest

    sidecar ballast

    Get rid of the sand, buy one of those 5 gal calapsable water jugs. You can empty it anywhere when you pick up some other ballast (people groceries etc) and fill it just about anywhere.

    Sidecarguy

  9. #9
    Registered User f14rio's Avatar
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    good idea, thx. might get two

    ntxt
    "Enemy fighters at 2 o'clock!...Roger, What should i do until then?"

    2010 r1200r, 2009 harley crossbones, 2008 triumph/sidecar, 1970 norton commando 750

  10. #10
    Stone Mountain, GA
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    Sep 2005
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    Stone Mountain, GA
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    HD w/HD Sidecar

    Set your rig up like Harley says...lean in. Go ride the rig around where you expect to be doing most of your riding. If on average the rig pulls to the right...try less lean in. If on average it pulls left ....try more lean in. With the three point mounting system my '72 Harley has, the toe in is not changed by changes in lean.

  11. #11
    slowrider
    Join Date
    Sep 2008
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    33
    Ended up with a slight leanout and 3/4 inch of toe in with no load on the bike. Gives me a pretty neutral ride on the straights. I can see now why every combination of bike,rider & sidecar might be different. Gotta say a sidehack is the coolest thing I've ever ridden.
    Thanks for everyones comments.

  12. #12
    Registered User f14rio's Avatar
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    concur

    hacks make big and little kids smile.
    "Enemy fighters at 2 o'clock!...Roger, What should i do until then?"

    2010 r1200r, 2009 harley crossbones, 2008 triumph/sidecar, 1970 norton commando 750

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