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Posted 29 June 2008 20:27


London Biker

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Out today having a bit of fun, dry road, hot tyres, everything looked perect.  On a couple of corners I had a bit of underseer, doesn't usually happen but the frront pushed wide, not by much and I was far enough from the edge of the road for it not to matter but would like to understand what caused it.

I know tensing up on the bars will do it but I was very loose, make a point now of staying loose on the bars.  The road surface was clean, no gravel or sand that I could see but it was worn,  not new tarmac if that makes a difference.

Any comments or suggestions  ?



This is it ?  Yep, that's it.  What happened to the rest ?

Post #390461
Posted 29 June 2008 22:58


Roundabout Scratcher

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If your running wide under throttle in a corner then the rear could need more preload, compression damping or ride height. 

If you're running wide and your off throttle then you might need less compression damping on the front or less preload on the front or more preload on the rear.

But in many cases it's the rider being lazy with countersteering

If you're passing the workshop Steve I'll check your bike over. 



BN Race Science - Professional Road & Race Suspension Setup
See my Flickr photos.
Post #390549
Posted 30 June 2008 09:05


London Biker

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Thanks Brian, maybe it's the lazy bit   Sounds more likely, I'm not exactly getting near the limits of the bike.  I need to come and see you again anyway as I've changed the settings and it's not as good as it was.



This is it ?  Yep, that's it.  What happened to the rest ?

Post #390675
Posted 30 June 2008 09:48


Roundabout Scratcher

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Very few of us get near the limits of our bikes but if your suspension does need adjusting you don't need to be a riding God to notice and will feel the benefit staight away.

Your doing the right thing playing with the suspension....that's how I learnt



BN Race Science - Professional Road & Race Suspension Setup
See my Flickr photos.
Post #390708
Posted 30 June 2008 18:59


Learner

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It may also be that your front tyre is wearing.

If you are running Bridgestone BT014 and you are down to the second compund you may be feeling the blocks moving.

You may just be applying too much throttle rather than just maintaining a constant speed.

It may be that the tarmac was 'runny' due to the heat

 

 

 

 

 

Riding safely cannot be thought of as an add-on extra; it has to built into the way you ride.

Practice is the only way in which skills become automatic and readily available when you need them

Post #391047
Posted 30 June 2008 18:59


London Biker

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Cos it's green

TL1000R & VTR1000

Proof that 90 degrees is HOT

Post #391048
Posted 30 June 2008 19:52


London Biker

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ELAM-PR (30/06/2008)
It may also be that your front tyre is wearing.

If you are running Bridgestone BT014 and you are down to the second compund you may be feeling the blocks moving.

You may just be applying too much throttle rather than just maintaining a constant speed.

It may be that the tarmac was 'runny' due to the heat

Thanks, the front is a Micheln Pilot Road 2 and the rear is a Power 2CT, the front is about 9K miles old but feels OK.

I was accelerating out of the bend, maybe I applied power too early ?  The bike feels like it can take it and feels very stable.  Will too much power cause the front to run wide or the rear ?



This is it ?  Yep, that's it.  What happened to the rest ?

Post #391097
Posted 30 June 2008 23:03


Roundabout Scratcher

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Steve... (30/06/2008)
ELAM-PR (30/06/2008)
It may also be that your front tyre is wearing.

If you are running Bridgestone BT014 and you are down to the second compund you may be feeling the blocks moving.

You may just be applying too much throttle rather than just maintaining a constant speed.

It may be that the tarmac was 'runny' due to the heat

Thanks, the front is a Micheln Pilot Road 2 and the rear is a Power 2CT, the front is about 9K miles old but feels OK.

I was accelerating out of the bend, maybe I applied power too early ?  The bike feels like it can take it and feels very stable.  Will too much power cause the front to run wide or the rear ?

With 9k on the front tyre it might well be squaring off a little, sports bikes are more sensitive to this and will feel vague when tipping into a turn because of it.

The amount of power you apply is a personal thing related to your ability, but if your giving it too much and the front runs wide then you'll have to ease off and this loads the front tyre and unbalances the suspension. Ideally I like to be gently accelerating through a bend or on a constant throttle so there is stability and good grip front and rear.



BN Race Science - Professional Road & Race Suspension Setup
See my Flickr photos.
Post #391238
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