Avons

*DING*!

Cheers!

 

Right. Nice and slow then.

Don't patronise you lanky streak of piss.

I'm not talking about stress, I'm talking about that shiny rubber you
can see on the edges of a new tyre. Shiny = slippery in my book.

If you're at the BOSM, I'll show you the little ribbons of rubber that
happen at the edges of my tyre. Try telling me this won't reduce
friction and contact with the road.

People that don't go right to the edges have that horrible looking brown
shiny tyre edge, you must've seen them. I notice things like that and
I'm sure I wouldn't want to go cranking it right straight over on a tyre
like that, regardless of mileage.

Or getting dragged of the road by centrifugal force.

 

Bear says...

About the time his r/hand fairng got smashed

 

New game for thrill seekers. It's called "disorientatingly fast with
altered equipment and bald tyres with added adrenalin related stupidity".
A Fucking Winner.

I have a new helmet that has altered my perception of sound: I can no
longer hear the induction roar, a bald front tyre, new noisy freer
flowing exhausts, lighter flywheel, the shocks appear to be rapidly
failing and a stupid mission to make sure *all* bikes are behind me on
this sunny spring day.

The fact I had the fucking plot airborne more than I ever had and with
the steering being completely /odd/ (I may have over adjusted the head
race) coupled with new helmet syndrome has made for an entertaining day.

Worryingly I've lost 5mph top end as a (probable) result of today's
re-jetting. Much better throttle response and 'snappier' control but not
only down on top end it smells rich. IYSWIM.

Woe is me.

 

I agree I don't really understand how bikes work but please, don't be
telling me that he doesn't understand either, that's just the grossest
insult. I might have bought a sofabed from him, but really...

The friction between rubber and road keeps you stuck to the road. Any
fule no that.

OK, you might have a point there, the "marbles" are a lot bigger than
ribbons of rubber too. Now I know my bike crashes ok I might get out
tomorrow and see what she's got. Anyway, I don't really know why I asked
in the first place, I've always run a tyre in in the same way - Keep
leaning it over further and further until there ain't no shine.

 

S'easy, really. Suppose you're whirling a chunk of something around on a
string: that chunk would go in a straight line if not for the string. The
string is continuously[1] pulling it off its straight-line course, all the
way round the circle. The force that the string is applying to the chunk is
the centripetal force. /This is the only force acting on the chunk/.

At the other end of the string, you're having to hold on tight because the
string is trying to pull away, with a force equal and opposite to the
centripetal force. This is the centrifugal force, and it's acting on your
hand, not the chunk.


[1]You can tell it's continuous, because the course described is curved. If
there was a single-point application of force, the chunk would head off in a
straight line, at an angle to its original course.

 

Or washing the sump?

 

So, it's just the force acting on my chunk that I have to worry about
- is that right? and providing I keep my hands of my chunk it's only
centripetal force I have to worry about. How much string should I take
on an average Sunday bimble?

 

Well, really you're asking me how long is a piece of string here. But for a
bike cornering, both forces act through the contact patch.

 

Just go for a ride to get the tyres nice & hot, avoiding any hard
acceleration or braking. Once they're up to temperature, you should be
fine leaning it over as far as you would on worn tyres, as long as you
do so on an even throttle. Don't forget they have to cope with braking
& accelerating whilst leant over too, both of which put a lot more
force in than just coasting at an even speed.

Heat is the most important thing - I'd lean much further on hot, new
tyres than on cold scrubbed ones.

 

I already know this and have just said so. No need to tell me what I've
already told you!

My point is *he* does, like you just said, so to say he only has a
"sketchy understanding" is patronising beyond belief. It's like saying
"there, there, noone knows bikes like me but that's ok, I'm better than
everybody else anyway".

You don't seem to get it. I'm not having a pop, that's just how I see
it, that's all.

Listen with your ears and less with yer gob then.[1]

[1] And I mean that in the nicest way possible p

 

Having recovered a front wheel slide on a roundabout with a new Pirelli
after thirty miles, I'd say that the above is bollocks.
If a new tyre has a waxy coating, take it easy.

The last new car I had went sailing off at a tangent on a roundabout
after ten miles, at very moderate speeds. Its Continental tyres seemed
to have an unusual amount of slippy coating.

On the other hand, racing tyres only ever got one lap of running-in
and worked fine afterwards.

 

That proves nothing other than it lost grip for some reason. I've had
two bad front wheel slides in recent times, once on the MV with well
worn but cold tyres, and once on the Tiger with well worn & hot tyres.
What does that prove?

If a new tyre has a waxy coating, stop using suppliers who coat their
tyres with wax!

 

Proves nothing but suggests a lot.
What we need is for Champ to do a scientific experiment:
When he buys his next front tyre, he can "heat cycle" it
while remaining vertical, then attack his favourite
roundabout with gusto and report back on what happens.
I think that is scientific enough.

 

braking whilst leant over , on new tyres as well , care to demonstrate !

 

Not on new tyres, no - that's why I said lean over as far as you like
*on an even throttle*. But braking whilst leant over on hot tyres, once
you're sure they haven't picked up any surface nasties in
storage/transit, is not a problem. It's all about feel. If you can't
read the feedback from the tyres, it's probably best avoided.

 

Trouble with new tyres is the feed back usually comes in the form of a
rather large gravel rash on the butt and a smiling mechanic as he gives
you the estimate for repairs

 

All it suggests to me is that you were braking too hard, or there was
some shit/diesel/whatever on the road. If you think it suggests it only
happened due to new tyres, then by the same logic my slide on the Tig
only happened due to hot, well-used tyres.

Sounds like a fine plan to me. He'll have to do it on the old tyres
first to get a control run (no braking, even throttle), then we'll
close the road to make sure nobody dumps diesel on the tarmac while he
gets the new tyres fitted & gets them up to temp. I'm sure he'd be well
up for it.

 

Clean road, not braking at all, moderate speed/angle of dangle.
I know what I know and you can tell us about your next crash.

 

Re-inflating the flat tyre every day is a bit tiresome though, the
option to replace was unfortunately not much of an option.

Anyway, I got the Avons, didn't crash [1] on the way home, scrubbed
them in nicely and so far I am very pleased with them. I haven't
determined how good/bad they are in relation to my usual tyres but I am
happy with them, especially as they were a lot cheaper than the
Bridgestones.

Now, if I hadn't been entertaining friends last night and had a few
voddies to finish the evening (or morning, to be more precise) off I
could be out assessing my new tyres instead of nursing a sore head,
waiting for the painkillers to kick in. I'm more likely to be working
on the bike after watching the GP than hooning around the countryside
given how I feel at this point in time.

[1] TST tyres (very nice people to deal with, btw) now have a policy of
pushing the bikes out of the workshop after fitting new tyres due to a
customer managing to lose control of his bike and hitting a wall in the
workshop with new tyres on..

--
Lesley
CBR600FW
SBS#11 (with oak-leaf cluster)
BOTAFOT#101A UKRMHRC#12
BONY#54P BOB#18
Real burds don't take hormones, they rage naturally