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- XT660Z Exhausts ( https://www.xt660.com/forumdisplay.php?f=168)

- - These arrived today ( https://www.xt660.com/showthread.php?t=24686)

I have the O2 mod and Fuel mod as well as Dna filter, the main worry is having the engine run too lean, which is why I fitted them.

Not sure if you would need them with a standard filter and the cans, I'm sure someone on here will know....... ;)

Quote:

Originally Posted by Pepsi (Post 215049)

very impressive !. I'd like to 'fess up' and ask would you need O2 eliminators or a power commander to use these, cuz I don't know.

Changing the end cans won't effect the air/fuel much if any. The need for a richer mixture comes more with changing the standard air filter for a less restrictive one such as a DNA or K&N. Which is where Kev's Fuel Mod comes in.
The O2 Eliminator is a 'plug & play' device that helps smooth things out at low revs, small throttle openings & cruising, regardless of any other modifications.

I have both Kev mods, standard foam filter (as the bike gets used in dusty conditions) & Akropovic pipes. I fitted both mods as you get a better deal buying both at the same time & gives me the option of aftermarket air filters later on.

If you fit louder cans than standard then it is a good idea to block off the AIS pipe as the back firing on the run off is considerably louder too. (More like a shot gun !)

Hope that's as clear as mud, please any one correct me on any of the above but I think it's all about right.

The only thing I would add to that is do the throttle mod as well. ..it's free and really makes a difference. Steve

Quote:

Originally Posted by Pepsi (Post 215077)

cheers guys........just one other thing......when you put aftermarket pipe/s on, have you fabricated some sort of under guard plate to stop crud off the back wheel filling up the innards of the tail light and other electrics ? I'm guessing the shape of the original exhaust box did that, but removing it would perhaps leave a huge opening ..

I didn't bother, the tail light is a sealed unit anyway

Beautiful pipes you have there !

To answer Pepsi's question about the open pipes not covering the area above them which is normally covered by the OEM pipes, I found with my similar Scorpion pipes that the mud and water would get sprayed up and ended up under the seat where it's suppose to be dry. My remedy was to block the gap between the mudguard and the top frame where the gap is with a layer of thin foam. Just cut it and locked it in there

View from below:

http://i225.photobucket.com/albums/d...s/IMG_8090.jpg

View from above with seat removed:

http://i225.photobucket.com/albums/d...s/IMG_8091.jpg

I used cardboard wrapped in gaffer tape to plug that hole.
Still perfect 😊

Does anyone know what the weight difference between the Arrow's, Scorpion's and the original units is ?