Tire pressures for non-OE tires?

Since non-OE tires can have different pressure ranges vs OE tires... How to determine the proper tire pressure to run?

I just put Sport Demons on my bike instead of the Dunlops. 32/42 f/r has always seemed high, but is within range for the new tires as well.

Use the old tire pressure and go?

 

See the manufacturers website.

 

I ride a non OE tire. It is a pure sport tire from Bridgestone. I also ride a couple pounds lower than OE. 34/35 front and 40/41 rear not really much off of OE recommendation. Below was taken directly from the Bridgestone motorcycle tire website.


Tire Inflation

Always keep the motorcycle manufacturer's recommended air pressure in both tires. This is an important requirement for tire safety and mileage. Your motorcycle owner’s manual will tell you the recommended cold inflation pressure. On some motorcycles, the recommended front and rear tire pressures will be different. The pressures stamped on the sidewall of the tire are only for maximum loads. On some occasions, these pressures will also be the manufacturers recommended settings as well.

Riding on tires with too little air pressure is dangerous. The tires will build excessive heat. This can cause a sudden tire failure that could lead to serious personal injury or death.

Underinflation may also:

1. Damage the tire leading to tire failure
2. Adversely affect vehicle cornering
3. Reduce tire life
4. Increase fuel consumption
5. Fatigue cracking

Riding on tires with too much air can be dangerous. The tires are more likely to be cut, punctured, or broken by sudden impact. Serious personal injury or death could result. Do not exceed the pressure indicated on the tire sidewall. Consult your owner’s manual for the recommended inflation and other tire none.

 

couldn't find anything on pirelli's website, but it was slow to come up, so I'll poke further.

I'm just used to cars where I've tuned in tire pressure by wear pattern. It's never ended up at OE specs, sometimes 10-15% off.

 

Pressures

While so many have opinons regarding what is good and what is not I have no reason to disregard information taken from the horses mouth. Why go around to the the other end. I've never seen a tire manufacturer suggest that you disregard the vehicles manufactruers recommendations in favour of any other convention. Instead they reinforce it. The important thing is once you have the information you need to apply it. Pre ride checks could save your life.

The previous qouted tire manufacturers information is good.

The following is taken directly from Pirelli's site for Motorsport Tires.

Tyre Pressure
It is important to always inflate the tyre to the correct pressure. Be sure to check cold inflation pressure frequently (i.e. once a week). Although most motorcyclists love to work on their bikes, they seldom remember to check tyre pressures. Correct tyre pressure, however, is critical for safe handling. Over-inflation or extreme tyre pressure will impair your riding comfort and decrease the contact of the tyre with the road. Under-inflation or too little air pressure will result in poor handling and the bike will be inclined to "wander." Improper and insufficient tyre pressure will also cause rapid tyre wear, an increase in fuel consumption, lower top speed, and provide less control. Remember to check the inflation pressure of your tyres weekly.
You will find the correct pressure in the operating manual of the motorcycle. The manufacturer's information is the minimum values only. With luggage or with a second rider the rear tyre needs an extra 0.2 bar, and for high speed riding the pressure of the front tyre should also be increased by 0.2 bar.
Attention: When the recommended pressure has been changed for use off-road (race track, off-road), it must be reset to the correct value before riding on the street.

How often do you do a pre ride check.