Steering damper or dampner

Started by bdub, June 03, 2011, 03:19:36 PM

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Howie


Mojo S2R


ducatiz

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"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

hackers2r

Quote from: NorDog on June 05, 2011, 07:27:16 AM
This is a true steering dampner...



Man...I watched the video of that crash over and over again in absolute awe.  Unreal.

Mojo S2R

Quote from: hackers2r on June 05, 2011, 08:45:16 PM
Man...I watched the video of that crash over and over again in absolute awe.  Unreal.

Link please.  Thanks.

NorDog

A man in passion rides a mad horse. -- Ben Franklin


Mojo S2R

Quote from: NorDog on June 05, 2011, 09:02:01 PM
You have heard of Google, right?

;D



Couldn't find the video while looking for Lambo crash. j/k   ;D   I was actually being lazy.  Thanks.

bikepilot

I don't find a damper necessary for all-around street riding, but I'm used to much more frisky bikes than the monster.  I do think they can be a useful addition.  I prefer speed sensitive units with some adjustment.  I tend to run them on the light side - it doesn't take a whole lot to calm the bike down and if you don't get crazy with the low-speed damping the turn-in isn't badly hampered.  I run a Scotts/Ohlins rotory on the off road race bikes.  Its a top quality unit with more adjustability than anyone will ever fully utilize and is wonderfully speed sensitive.

I believe the Hyperpro RSC is also speed sensitive.  Probably many others are as well, but I dunno.

2009 XB12XT
2006 Monster 620 (wife's)
1997 TL1000S
1975 Kawasaki H1 Mach III
2001 CR250R (CO do-it-all bike)
2000 XR650R (dez racer)
2003 KX100 (wife's)
1994 DR250SE (wife's/my city commuter)

Dellikose

Quote from: NorDog on June 05, 2011, 07:27:16 AM
This is a true steering dampner...



A million dollar plus car into a lake  :'(

Top Gear would not be impressed!
1999 Ducati M900

Cloner

Don't know if I'd go back to that bike shop.  That guy doesn't know much about bike design and geometry, I think.  Speed might cause aerodynamic lift that would exacerbate a small problem in the front, but to say that every chassis would experience this is incorrect.

As to Monsters, I've never been more than an indicated 155 on one, so I can't say what happens when they go fast.  However, I can say that I know of one S4RS is very stable at an indicated 155, even on rough pavement.

Tire cupping can cause shaking.  Odd inputs at the bars can cause it, too, like Nate's experience above with loose jackets.  Things added to one side or the other of the bars with significant aerodynamic drag (auxilliary mounts, in particular) can cause this.  Mathematically, I suspect that gross misalignment of the front and rear wheels could cause this, but I've never seen that happen in the real world.  I'm sure there are others, but I'd start by looking at the tires, then wheel alignment, then steering head bearing condition, then damper condition.

Or, you could install a steering damper to mask this rarely experienced problem.  Your call.   ;D

I like the side mount ones 'cause they're cheap.  If I crash, the condition of the damper when I pick the bike up is the least of my concerns.

Good luck, in any case.  Headshakes at speed can be quite disconcerting.
Never appeal to a man's "better nature."  He may not have one.  Invoking his self-interest gives you more leverage.  R.A. Heinlein

'64 Ducati Monza 250
'67 Aermacchi/HD Sprint SS (race bike)
'00 Aprilia RSV Mille
'03 Ducati 800 SS (race bike)
'04 KTM 450 EXC
'08 Kawasaki Ninja 250 (race bike)

NorDog

Quote from: Cloner on June 08, 2011, 04:03:19 PM

As to Monsters, I've never been more than an indicated 155 on one, so I can't say what happens when they go fast.  Or, you could install a steering damper to mask this rarely experienced problem.  Your call.   ;D


Only 155 huh?  You could have gone faster if you were on a 620 Capirex.   [Dolph]
A man in passion rides a mad horse. -- Ben Franklin


He Man

Quote from: NorDog on June 08, 2011, 04:32:36 PM
Only 155 huh?  You could have gone faster if you were on a 620 Capirex.   [Dolph]

no you cant!!!!

Cloner

Quote from: NorDog on June 08, 2011, 04:32:36 PM
Only 155 huh?  You could have gone faster if you were on a 620 Capirex.   [Dolph]

It was a customer's bike and it was a test ride, so I didn't want to press it too hard.  It did still have a few revs left in it, but I was running out of road pretty fast.  I suspect that the indicated 155 was actually in the 140-145 range.   [evil]

I'll try the 620 Capirex suggestion, though.  You never KNOW until you try.   ;)
Never appeal to a man's "better nature."  He may not have one.  Invoking his self-interest gives you more leverage.  R.A. Heinlein

'64 Ducati Monza 250
'67 Aermacchi/HD Sprint SS (race bike)
'00 Aprilia RSV Mille
'03 Ducati 800 SS (race bike)
'04 KTM 450 EXC
'08 Kawasaki Ninja 250 (race bike)