Tyre pressure

[burger]

Running a 180 on the rear?

What brand and type you running JP?

[iconic944ss]

I read this thread awhile back and must re-read it as I've never heard of setting tyre pressures on warm tyres - I need the info to sink in a little bit

Here is a thread I posted some time back on setting initial tyre pressures that got shot a little but made for interesting dialog:

www.apriliaforum.com/forums/showthread.php?t=180426

There is some Ducati info for you as well JP but its for a 916 I believe.

[JP]

its a 180, running pirelli diablo super corsas

[JP]

good post frank +1

[nigec]

Very interesting thread

Is it just race stuff your clued up on or tyres in general burger?

[burger]

Same again dude 28 psi rear and 30 front hot pressure so usually about 4-6 off cold settings. If you want it spot on, do a session and have someone waiting with a gauge to check them as soon as you get in.

Iconic, good thread, agree with most of what it says. +1 Karma

Nigec, Im no expert, just spend a great deal of time understanding the physics and dynamics of how motorcycles perform, I had to do this when my bike kept spitting me off and trying to kill me I decided to learn why. Its a constant learning curve eh? But I love going to down to paddocks and listening to other people, learn something everytime Im out.

[Milky C]

Quick question burger, your recommending higher front than rear pressures, is that the same for street riding as im handbook quotes 25 front 29 rear if i remeber correctly

[nigec]

Have you still got the YZF Stranger? My daughter's B/F has one, he's supposed to be joining TB so you can compare notes

I've always ran the rear higher, but I only do roads, I think the EXUP was 30 front 32 rear according to haynes, it just seem one of those subjects thats never set in stone

[Milky C]

Aye i do for another month or so and then ill be looking to get rid of it , to be fair with the tyres on it you could be running on 4 or 400 and i dont think it would make a difference as they are crap!

Very much looking forward to swapping my now slick tyres out

[burger]

The reason is because the rear works harder under power meaning its carcass moves more, when it moves more it heats more it expands more.

With road pressures I would suggest following owners manual, I run 42 rear 38 front on 17 inch wheels 190 rear.

[JP]

from the advice you gave me last time with my little zxr400 28r 30f, i found that after a session out i'd be getting the front up to around 32 and the rear up to about 33 (expansion due to rise in temprature +2 difference in front +5 in the rear).

Proof that the rear is working much harder . just kept letting it down to 30f and 28r hot temp, ended up getting loads of feel from the tyres. alot better than my first outing at cadwell were i ran it 31f 34r cold temp

[burger]

Nice one JP, its just trial and error, with any race day or track day use your quali or first sessions for set up, after a few goes you will know roughly what cold pressures you need and then just checking them through the day to get them spot on. They do make a high differance and Im glad you felt the benifit of getting it right as its just boosts your confidence in the grip allowing you to focus more of your time on getting your lines and speeds right.