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| SidSnot | | Set |  |  | | Reg. Date | : | 11/06/2010 | | Posts | : | 18 | | Location | : | United Kingdom |
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| | Posted : 03 Sep 2010 - 17:56 Post title : Bike Weaving | | | At the weekend I took the bike out for a run with my mate who was test riding a new rocket. I was out solo, normaly I ride with the other half as pillion. It was blustery and I had my touring screen fitted.
When I got up to around 90mph the bike started weaving. Going faster exagerated the motion so I had to back off.
Never been a problem 2 up. Was criusing at 100mph plus in europe and never had a problem, the only difference was having a pillion.
I spoke to my dealer at a meet the other night and he said he had come across it before.the bike being solid 2 up but getting a bit of a weave on solo.
Any body else experience this and if so other than remove the screen has anyone found anything that can eleviate this problem.
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| daz | | Zeus | |  | | Reg. Date | : | 12/05/2009 | | Posts | : | 7,705 | | Location | : | United States |
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| | Posted : 03 Sep 2010 - 18:07 Post title : Re: Bike Weaving (Re: SidSnot) | | | I imagine a screen changes the dynamics is a way that can't be determined and that this is probably not an uncommon issue on any bike with a screen fitted that hasn't been tested by the manufacturer. Wind forces are tricky. You may try adjusting the rear shocks and see if there is a 2 up and solo setting that works to eliminate this in either scenario. I would seem to me that any screen thats flatter more than arrow shaped is likely to cause issue at those speeds. Just a thought.
| 2010 Blue/White Thunderbird, "Brutus". 1700 kit, short tors, gutted cat, UNI filter, filter seal off, custom tune. Brutus in his native habitat: Link
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| DizzE | | Thor | |  | | Reg. Date | : | 12/07/2010 | | Posts | : | 3,141 | | Location | : | Sunnyvale, CA, United States |
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| | Posted : 03 Sep 2010 - 21:24 Post title : Re: Bike Weaving (Re: daz) | | | And, not much good has been said about the Triumph screens and this issue of buffeting and steering control.
That's why I use a Triumph Summer screen to get the wide cover and lower mounts for the little deflectors.
But, I get big wind pressure at my throat area.
Then I tried an 18" WindVest on the bars. No pressure on the neck, but on the sternum.
Then I set it up, with a little mod on the WindVest bracket to fit them together. Now I run with both screens. Works great.
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| mat1600 | | Thunderbird | |  | | Reg. Date | : | 06/03/2010 | | Posts | : | 8,596 | | Location | : | Bridlington, Democratic Independant State of Yorkshire, United Kingdom |
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| | Posted : 04 Sep 2010 - 16:16 Post title : Re: Bike Weaving (Re: DizzE) | | |
DizzE wrote:
And, not much good has been said about the Triumph screens and this issue of buffeting and steering control.
That's why I use a Triumph Summer screen to get the wide cover and lower mounts for the little deflectors.
But, I get big wind pressure at my throat area.
Then I tried an 18" WindVest on the bars. No pressure on the neck, but on the sternum.
Then I set it up, with a little mod on the WindVest bracket to fit them together. Now I run with both screens. Works great. |
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Have you got any pics of Bird + Windvest fitted.
| My first natural instinct is to breathe. My second is to evade tax's.
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| DizzE | | Thor | | | | Reg. Date | : | 12/07/2010 | | Posts | : | 3,141 | | Location | : | Sunnyvale, CA, United States |
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| | Posted : 04 Sep 2010 - 16:38 Post title : Re: Bike Weaving (Re: mat1600) | | | I had to turn the bracket upside down and drill/tap new fixing positions. But, works great.
The two pictures with no gap between, was before I put on the taller risers. What I like is that
both screens come off easily.
Link
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| SidSnot | | Set | | | | Reg. Date | : | 11/06/2010 | | Posts | : | 18 | | Location | : | United Kingdom |
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| | Posted : 04 Sep 2010 - 16:51 Post title : Re: Bike Weaving (Re: DizzE) | | | Thanks for the replies guys. Just been out today to the Triumph dealers at Chesterfield, my mate bought the rocket :) I was 2 up doing around 90-100mph on the M1 and had no stability issues. Guess it is a solo thing. given that I am nearly always 2 up I am not going to bother with suspension mods other than possibly winding the rear preload up another notch to make 2 up riding better.
I have found the screen to be to good when touring.
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| mat1600 | | Thunderbird | | | | Reg. Date | : | 06/03/2010 | | Posts | : | 8,596 | | Location | : | Bridlington, Democratic Independant State of Yorkshire, United Kingdom |
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| | Posted : 04 Sep 2010 - 18:44 Post title : Re: Bike Weaving (Re: DizzE) | | |
DizzE wrote:
I had to turn the bracket upside down and drill/tap new fixing positions. But, works great.
The two pictures with no gap between, was before I put on the taller risers. What I like is that
both screens come off easily.
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| My first natural instinct is to breathe. My second is to evade tax's.
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| mat1600 | | Thunderbird | | | | Reg. Date | : | 06/03/2010 | | Posts | : | 8,596 | | Location | : | Bridlington, Democratic Independant State of Yorkshire, United Kingdom |
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| | Posted : 04 Sep 2010 - 18:46 Post title : Re: Bike Weaving (Re: SidSnot) | | |
SidSnot wrote:
Thanks for the replies guys. Just been out today to the Triumph dealers at Chesterfield, my mate bought the rocket :) I was 2 up doing around 90-100mph on the M1 and had no stability issues. Guess it is a solo thing. given that I am nearly always 2 up I am not going to bother with suspension mods other than possibly winding the rear preload up another notch to make 2 up riding better.
I have found the screen to be to good when touring. |
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I ride two up all the time and have just put the rears to 4 - rides a lot better .
| My first natural instinct is to breathe. My second is to evade tax's.
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| Bedouin | | Jupiter | |  | | Reg. Date | : | 18/10/2008 | | Posts | : | 1,067 | | Location | : | Athens, Greece |
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| | Posted : 04 Sep 2010 - 20:01 Post title : Re: Bike Weaving (Re: mat1600) | | |
mat1600 wrote:
SidSnot wrote:
Thanks for the replies guys. Just been out today to the Triumph dealers at Chesterfield, my mate bought the rocket :) I was 2 up doing around 90-100mph on the M1 and had no stability issues. Guess it is a solo thing. given that I am nearly always 2 up I am not going to bother with suspension mods other than possibly winding the rear preload up another notch to make 2 up riding better.
I have found the screen to be to good when touring. |
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I ride two up all the time and have just put the rears to 4 - rides a lot better . |
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Yep, it's what I was going to suggest too.
When laden, I normally adjust the rear pre-load otherwise the front lightens and causes instability (the handlebars wriggle) at higher speeds.
| Blessed are those eyes that have seen more roads than any man! (Homer).
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