I am not a guru in anyway of motorcycles, thats why I have This Question

Frontfork upsidedown Whats to gain by have it installed?

I have seen on www.faddybike.com they have it for several bikes among those the CBR150

Upside down forks have less flex so give more precise steering,

less unsprung weight better suspension action plus some other benefits

It's simply something for you to spend your money on and to give the bike a different look.

if you could ride it fast enough to fell the difference you would not be here but in GP racing

By putting the tube up under the fairing, you reduce wind drag, and thus make you go faster. Same-same as all those racing stickers.

They look good !!! honda as good as said so when they up-graded their 05 Model CBR600 to USD forks. They do make a big differance to the overall look of a bike but for actually performance increase don't think you'd notice.

Motorcycle forks do prefer to be right-side-up (conventional). Usually the oil is sitting in a large reservoir at the bottom. And is kept in place by gravity and pressurized to keep it where it is needed by fork movement.

You are asking why change to upside down forks? In order to make a right-side-up fork stiff enough to absorb the loads created by modern racing conditions, the fork tubes would have to be very large, really really big! It comes to the point where making steel fork legs bigger would add way to much weight. Flipping the forks around gave the triple clamp a larger area to clamp created more room for valving, lessened flex (remember fork braces?) by having a large structure at the top of the fork, eliminates under and saves weight and clearance (side to side).

With conventional forks you have a large reservoir of oil to use, but with upside-down forks, the oil has to be pumped up to the top of the fork to be used. Additionally, inverted forks are often so stiff that transfers forces to the chassis. If you make one part stiffer, you spread the load to the next piece in line. Without fork flex to provide a forgiving ride, valving, damping, spring rates and frame design had to be refined.

There is still much work to be done to refine the "upside down forks". Showa and others are getting it down.If you ride the same bike with both of the style forks ,yes you would feel the difference.

I happen to like inverted forks, I fell that there is less cavitation in harser conditions. And I like a stiffer front end. I'm more interested in preformance than comfort. I do all my own revalving of all my shocks, car or motorcycles.

I hope this helped you, Just my opinion, others might have might have diffirent bend on it.

Great post, highonthai. Thanks!