I got a new front tire, brand new installed by New England Cycle Center here in Connecticut. They filled the front tire up to 42psi - I have a 2000 CBR600F4, in my PDF Manual it states the front should be at 36psi and rear should be at 42psi. Question I have is, do I set the front to what they have or put it to the manual specs of 36psi?

 

I have a 99' F4, with PP tires front and back, and for normal everyday riding I use 'almost' bike/manual spec pressure. 38 Front, and 40 Rear... but I always wondered why the front was supposed to be lower than the rear, because in cars you want the front to have higher PSI than the rear....which is why i run a little higher in front, and lower in rear than the manual suggests, but still close... I was thinking about experimenting with different pressures soon, but for now thats how i normally run it...

 

on cars you want the front and rear even, on the bike you want more pressure in the rear cuz most of the weight is carried in the rear. 42 and 36 are max pressures, i run probably 34/34 f/r for everyday/twisty riding. If your going to carry a passenger frequently then 42

 

I dont think anyone has answered my question yet... Should I reduce the air pressure to 38psi?

 

im pretty sure i answered that but ill answer again haha. Unless your riding with a passenger or at full load then id reduce it to 34-36, and get your suspension set up if you havent already

 

What kind of tire? Different tire brands and even different styles require different pressures.

 

If the manual states to have 38 psi., then that's what you ought to have in it, not above it. Also, on the sidewall of the tire there is a "max pressure" label which will indicate the maximum air pressure allowed for that particular tire, typically as "cold" psi. Cold means that the tire must not have been riden and allowed to warm up.
Some people like to run their tires under pressured, but you should never run them above the maximum limit indicated on the sidewall.

 

i run what the book says that way when i need air come spring time i dont forget what to run them at...its what i call idiot proffing myself

 

It says on the side of the tire what the max pressure should be i ride at 40 psi in both front and rear as per my tire specs

 

the tire pressure in the manual is RECOMMENDED pressure not mandatory. Like i said before 40psi front and rear is bouncy as hell. 42psi rear and 36psi front is what the manual says, but if you also read thats the tire pressure for gvwr aka your bike fully loaded.