I dont have the 2 mothers, but I have the Leo Vince Y pipe and its not difficult at all. Make sure you keep all of your screws and bolts because you have to reuse a mount from the OEM heat sheild. Im not sure about the internal temp of the bike, because I replaced my Y pipe and my bike still gives off the same amount of heat and i havent noticed a change in my temperature. Good luck and take your time.

 

water wetter+Y pipe
made a 20 deg change in my Temps

 

i to have the Leo Y pipe...but i left the ugly ass OEM heat shield off. which i think is why it did get rid of some of the heat. the heat shield blocks the heat from you...but in the process the heatsheild can and will heat up to a high temp..meaning when at a red light or a stop sign your ankle is right next to a very hot metal plate. which makes it seem even hotter. with out the heat sheild there then its just the pipe that is hot but air is blowing around it and in a way for lack of a better term "diminishing" the effect of more heat on your ankle

 

anyway you can take a Pic of how it Looks without the shield?
if possible,Thanks!

 

Changing the Y-pipe should have a small effect on making the engine run cooler. Getting rid of the cat should allow the hotter gasses to escape faster. That being said, I would bet the difference is VERY minimal.

 

just got the leo vince y-pipe as well.. tell you the truth even w/ the cats the heat is not that bad at all.. most heat was coming from the stock pipes on the 09, i thought.. but simple answer.. ceramic coating the y-pipe should help it do a better job..

i can see your thoughts on the heat shield. honestly.. go carbon fiber... i can easily put my bare hand on the cans even after riding all day..

 

y pipe is the best mod ever. heat escapes faster, therefore, bakes my balls less. completely eliminates burning testicle feeling.

 

HOwcome some people say that there is less heat with de-cat and others don't notice a difference? I was gonna get a y-pipe but why spend on it if there is no use ???

 

weight / heat reduction. I have a y-pipe and notice a cooler feeling around legs :hammer:

 

If you really want to reduce the Heat...get the Y pipe and a Fuel controller:fact

The 09's are Tuned very Lean.

I dropped 30 Deg in engine temps.

It now has CRISP throttle response:flex:

 

Have just made the change. Allow yourself a couple of hours and would strongly suggest you get a PCV or Juice Box.

Makes a huge difference to the heat build up!

 

interesting... i def. plan on throwing the pcV on... hopefully it all works together...

 

Is the Y-pipe worth doing with the stock exhaust(or is it even possible to leave the stock pipes on for the time being and do the y-pipe)

 

also to add to that question can you take y-pipe out and punch the catalist out of it and put it back on?just trying to save a few bucks so I dont have to purchase another pipe.

 

I still have a heat shield on my bike, but it feels like its plastic and not metal, and the heat that I feel is hitting my left ankle when I dont have my boots on.

 

the outter heat shield is plastic. but there is a metal heatshield attached to the stock Y pipe of the 09 I dont know about other years.

 

the cat seriously weighs like 5-10 pounds man. heavier than both stock exhausts put together. when i put it back together i left the plastic shield off and put the aluminum one back on, i feel almost no heat at all. kinda not so good a pic, but you can see it.