Thanks for the great information. Looks like I'm
changing my tire now.

Ok, first, on this topic and premium vs. regular fuel topic, 98% of what is posted is hear say. I have a 190 on my F4 and I can say that the feel of the bike in corners is different. Personally, I think it's a small enough difference that it isn't enough to say it's good or bad. It makes sense that the tires profile would change being on a more narrow rim but I've had my Michellin on for 5k+ and it still looks great. Oh and it does look cool!

its will handle better with the 180 ;)

Basically its just a kewl bling factor and will only disrupt the handling enough for the most experienced of riders to notice. IMO the 180 is best for it and look better.

Not to steal the thread but since we are on the subject of tires... What is recommended.. I have been looking into pilot powers or conti attacks...

190 tire
 

yes you can easily put a 190 on there. it fits inside the swingarm with space. the only reason you have a 180 on there is becuase of the wheel width. when you put a wider tire on it creates more of an angle to the wheel from the outside of the tire. 180 and 190 are just about the same. you could even go to a 200.

tires
 

i just bought a bike with michelin pilots on it and they are ok. i was going to switch them with dunlop qualifiers or bridgestone battleax because i have used both of those and they are great but i just bought some shinko 003 stealth tires in the ultra-soft. they seem really good so far. for the money about 2/3 the price of the dunlops im impressed. go to motosport.com and get a great deal and free ship. use tireexpress.com to make sure you get the best deal because motosport beats prices.

none of those compare to the PP's :)