Twitchy corners

Tyre flex could feel like the tyre was skipping a little too. I see this quite a bit if pressures get low, and I'd probably HATE riding at track pressures.

That, and the stock tyres are infamous for being, well, sh**e. Using areas of rubber you haven't used before shouldn't really matter, so long as they were scrubbed in properly.

I reckon that in all likelyhood, you were pushing the boundary on the tyres. I've started doing this in the dry on Z6's, and I reckon I'd probably over step the mark a little on stock rubber. One reason I won't go back to it.

Of course, the above could be complete male cow manure!

I experienced something like this on my bandit when I first got it, the tyres were squared off by the previous owner and it twitched as it went over onto the unused part. (scary!)

Hubby took it out and rounded the tyres off for me one day (that was a long while ago...I keep my own tyres rounded off now

(Check all other possibilites that everyone else has suggested, but just thought Id let you know my own experience)

Originally Posted by Baph

Tyre flex could feel like the tyre was skipping a little too. I see this quite a bit if pressures get low, and I'd probably HATE riding at track pressures.

Track pressures are lower when cold as track gets far more heat into the tyre. The actual pressure when riding will be similar to riding pressure on the road.

If you use road pressures on the track the tyre will over-inflated when hot, giving twitchy handling and less grip.

Frazer: I'd ditch the Dunlops if you go on track again, not wanting to scare you but I crashed on mine (and I don't think I'm the only one).

Pick something like Pirelli Diablos, Pilot Powers, Metzler M-1 or 3, etc. if you don't want to compromise your mileage,wet grip but don't want to worry about grip on the track.

It sounds like one of two things....
The rider is twitchy being leaned over further than usual. Thats a totally normal process. Small inputs give larger feeling shakes.

Your tyres are a bit squared off..the Squared "line" is giving you a slight bump as you go over it.

I have to disagree with the Anti-Dunlop fraternity.
I didnt use much of the sportmax's, but i've had 3 sets of D207's, 2 sets of D208's and I've never had any worries with them, wet or dry. To blame a crash just on a modern tyre is a bit of a misnomer.... tyres will only do so much. Anyone expecting to go full pelt at a trackday on a road tyre is asking for trouble.

Originally Posted by jamesobrady

It sounds like one of two things....
The rider is twitchy being leaned over further than usual. Thats a totally normal process. Small inputs give larger feeling shakes

what I was meaning was that he may have been getting little slides whilst the un-used, un-scrubbed part of the tyre scrubbed in

Originally Posted by weazelz

what I was meaning was that he may have been getting little slides whilst the un-used, un-scrubbed part of the tyre scrubbed in

I'd sincerely doubt it. When I went to France last year I thought my front and rear were sliding about on the rhs roundabouts....freaked me out a bit.
Turns out it was my suspension compressing... but because its a "sideways" kinda motion when you're leaned over further than usual its unnerving the first few times.

practice ....practice....
one day it'll all just 'click'
standard tyres are pants, but still capable on a dry track.

[johnnyrod]

Originally Posted by jamesobrady

I'd sincerely doubt it. When I went to France last year I thought my front and rear were sliding about on the rhs roundabouts....freaked me out a bit.
Turns out it was my suspension compressing... but because its a "sideways" kinda motion when you're leaned over further than usual its unnerving the first few times.

Wasting my breath, so I am. Wallowing feels a bit like sliding, especially to the less experienced, and on a track you corner harder than usual so the forces are higher and the wallowing greater.

Originally Posted by johnnyrod

Wasting my breath, so I am. Wallowing feels a bit like sliding, especially to the less experienced, and on a track you corner harder than usual so the forces are higher and the wallowing greater.

I had read your post(and agreed with it)
Now I know what wallowing in my own inexperience feels like

Thanks guys, lots to think about here I must admit.

I dont just have this problem on track on must roundabouts as well.

The event at Cadwell wasnt racing by any means, just a bit of fun after a training session.

My tyres arent squared off at all, only got 1400 mile on em, the suspension was set as it came from the factory so I will try playing with that. I am generally relaxed going into a corner but as soon as the "twitch" appears I back off and tense up which doesnt help.

I also agree with the PRACTICE PRACTICE PRACTICE theory! again, thanks for the advice, hope to see soem of ya at AR07, the wife has signed my leave pass so Im off to play for a couple of days YIPPEE!