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Author Topic: Lean angle  (Read 2220 times)
RDKLL
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VRCC #1231 VRCCDS #271

Mesa, AZ


« on: January 15, 2017, 04:27:16 PM »

Anybody know the lean angle for the Valkyrie?
Thanks in advance
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Bighead
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Madison Alabama


« Reply #1 on: January 15, 2017, 04:31:59 PM »

Dont know but are you talking sitting on stand or carving the curves?
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1997 Bumble Bee
1999 Interstate (sold)
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Harryc
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Sebastian, Fl


« Reply #2 on: January 15, 2017, 05:27:26 PM »

Are you asking at what angle the bank angle sensor kicks in?
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Brewer
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Denver, CO


« Reply #3 on: January 15, 2017, 05:52:10 PM »

past the point when the pegs drag in the corners Smiley
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Brewer - it is a hobby
RDKLL
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VRCC #1231 VRCCDS #271

Mesa, AZ


« Reply #4 on: January 15, 2017, 06:29:49 PM »

Brewer that is what I was asking...I know it is pr
etty good but was looking for an actual degree like from mother Honda if known
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Jess from VA
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No VA


« Reply #5 on: January 15, 2017, 07:23:07 PM »

I've never seen such an angle published, even for the racing Gixxers, which appear to defy all rules of physics, and mostly don't fall (but sometimes, and think that's more tires than angle)

A simple method to get close would be to stand the bike straight on level ground, and slide a piece of stiff wide plywood up to a tire and lift up till contact with the 1) engine guard, 2) drivers peg (folded up), and 3) rear bag guard on tourer/interstate.  And use a protractor to find the angles.  Those are the obvious low contact points, limiting lean.  (this method has been used to see if low mounted add-on lights will hit in a fall or tip over, only in front)  I think the folded up drivers peg is the first to hit of the three, and there is no tire underneath there, thus the wide piece of plywood.

Of course it should be done with new(ish) OE size tires, decent 13" shocks, and no slipped forks as all these would skew the results.  

I'm pretty convinced my 205 60 (closest to OE 180 tire height) gives me just a bit more lean angle when I am at max lean on 1/3 of the tire tread, than on a round bike tire.  All 205 car tires are a somewhat square, and on the edge (or outer third tread, they never actually get right on the edge) they actually make the back end a little taller than a round bike tire, and taller (even on only one end of the bike) allows a bit more lean.

Even simpler I suppose would be to lay the bike over on the guards on level ground and measure angle, but I don't know what you would use on the bike as a benchmark/measure point.  And as you may know, the bike can be just carefully eased down on the guards, and then pushed over even further (say another 5-7 degrees), but still on the guards.  The just laid over carefully point would be the one to measure.

A plumb bob, might come in handy.
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98valk
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South Jersey


« Reply #6 on: January 15, 2017, 07:53:28 PM »

smokin' joe scraping crash bars
http://www.valkyrieforum.com/bbs/index.php/topic,48204.0.html
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saddlebag
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« Reply #7 on: January 15, 2017, 08:54:57 PM »

Bank angle sensor works approximately 50* left or right
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semo97
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Posts: 399

Texas


« Reply #8 on: January 16, 2017, 06:03:33 AM »


when my son layed it down before impact with side of car he just stated sliding on the laydown bars and it shut down then he parted company for several tumbles end over end and came up on his feet.
One lucky day for him and bad day for the valk.
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old2soon
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Willow Springs mo


« Reply #9 on: January 16, 2017, 08:36:53 AM »

Tell ya what my mentor in Japan told me when I wuz motocrosing. Lean til fall off-then next time NOT lean so far. RIDE SAFE.
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Today is the tommorow you worried about yesterday. If at first you don't succeed screw it-save it for nite check.  1964  1968 U S Navy. Two cruises off Nam.
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WintrSol
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Florissant, MO


« Reply #10 on: January 16, 2017, 10:55:25 AM »

Bank angle sensor works approximately 50* left or right
But not when you are moving; in a turn, the G vector tilts with the bike, not as much as the bike, but still. BAS shuts it down when the bike falls over.
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98 Honda Valkyrie GL1500CT Tourer
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Cracker Jack
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Posts: 556



« Reply #11 on: January 16, 2017, 11:46:12 AM »

Bank angle sensor works approximately 50* left or right
But not when you are moving; in a turn, the G vector tilts with the bike, not as much as the bike, but still. BAS shuts it down when the bike falls over.

You were right until you said, "not as much as the bike". Assuming the riders weight is not shifted on the bike, it's basically the same.

A motorcycle inherently makes a coordinated turn and keeps the ball centered, if it had a ball (turn coordinator).

Since your avatar shows an airplane, I assume you are a pilot. You know what I'm saying. cooldude
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WintrSol
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Florissant, MO


« Reply #12 on: January 16, 2017, 04:45:24 PM »

Bank angle sensor works approximately 50* left or right
But not when you are moving; in a turn, the G vector tilts with the bike, not as much as the bike, but still. BAS shuts it down when the bike falls over.

You were right until you said, "not as much as the bike". Assuming the riders weight is not shifted on the bike, it's basically the same.

A motorcycle inherently makes a coordinated turn and keeps the ball centered, if it had a ball (turn coordinator).

Since your avatar shows an airplane, I assume you are a pilot. You know what I'm saying. cooldude
But, the contact patch moves to the side of the tire, so the vector shifts inside the turn, and is a small amount less than the tilt angle of the bike. Not a lot less, but, depending on the tire, measurable.
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98 Honda Valkyrie GL1500CT Tourer
Photo of my FIL Jack, in honor of his WWII service
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