could anyone please let me know what my front/rear tyre pressures should be for my CBR600?

Depends on model but my old FM ('92) and my current F ('02) are both 36 front and 42 rear.

Paul

Most 600 hondas (and my VFR) are 36F 42R

Jza

On the road I use 34 fornt and 36 rear in any bike

On the road I use 34 fornt and 36 rear in any bike

What bike and why?

What bike and why?
I have a K5 gsxr 1000 at the moment.
I never use recommended pressures as they are always taking into account all weather conditions and I generally oinly ride in th dry.
If you put the pressures in that I use the tyres may take a little longer to warm up but you will get a larger contact patch as the tyre will deform more and givee better grip.
if I was riding all year round the i would use totally different tyres foe winter riding and indeed use more pressure.

Won't underinflated tyres warm up quicker, as they have more surface area on the road and lessair inside them to heat?

Personally, I tend to find the handling on my bike slows down at an extraordinary rate when the tyre pressures are reduced. It's so much faster to turn with the recommended pressure.

Logic - to me, anyway - would dictate that running lower pressures in the wet would result in more grip...

--Rich

Logic - to me, anyway - would dictate that running lower pressures in the wet would result in more grip...

--Rich
It's the other way round.

I agree that an under inflated tyre will have a larger contact patch but it will close up the tread pattern thus effecting the way the tyre displaced the water on the road. So you would be more prone to aqua-planing (spl).

Sorry to do so but just wondering if RichA is the same Rich that bought my Scooby!

Been offline for rather a while!

Matt

Water on the road makes the surface slippery as the water (and any other crap mixed in with it) acts as a lubricant. This much is obvious.

Aquaplaning is less of an issue for relatively narrow motorcycle tyres. Wide flat car tyres push a bow wave of water in front of a wide thin contact patch. At a certain speed the bow wave can't get out of the way and the tyre rides up onto the surface of water. There is a direct relationship between the speed at which aquaplaning occurs and tyre pressure. 9 times the square root of tyre pressure in psi, measured in knots (because this calculation is derived from aircraft). The precise figures are irrelevant for a couple of reasons IMHO.

1. Higher pressure means aquaplaning will occur at a HIGHER speed
2. If you are going fast enough in standing water (!) for aquaplaning to occur you are mad!

So does this mean you should run higher pressures in the wet? NO. Aquaplaning only affects the terminally insane. That is people who are willing to ride a bike very fast into puddles or really soaking wet roads. Run your tyres at the correct pressures according to the manufacturers who know more about tyres than anyone you are likely to meet here or anyone you meet down the pub.

Racers drop tyre pressure (measured on cold tyres) because on a racetrack there is never any let up in pace and your tyres get MUCH hotter than usual. Heat affects the pressure of air in the tyre, the hotter they get, the higher the pressure. So you set your cold pressure slightly low to compensate for this bigger increase.

Screwd.