Well

I just fitted my scorpion/metal mule 2 into 1 exhaust.

starting it up (baffle out) bike idles for a short period then the idle drops a little slower... fair enough.. then every time i blip the throttle, even if not revving it high, it bangs out a big flame when i close the throttle, too rich? id have thought it would be lean after new exhaust

there are a couple of little blows in it at the minute until i get everything fully tightened it seems to be a tricky exhaust to get sitting right... but they are very tiny doubt theyre making a difference

must try it with baffle in, maybe the baffle out is just too much lol

I had no probs with mine...
but I have not taken the baffle out...
In fact didn't know it could come out..
but I like it quiet.. Don't want to be listening
to the exhaust all day...

re-fitted the baffle but also got the header pipes fitted tighter and seems better, might try baffle out again for curiosity now pipes are fitted better!

Block off your AIS if you want to reduce the poping back.

Adjust your idle speed to suit the new back pressure from the 2in1 pipe.

__________________
Click here to join the XT Supporter's scheme

Mods that I have done to my XTX's

My 04 XTX
Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil /
[
My 07 XTX
Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator /

My 09 XTX
59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details

Now ride a 2018 MT09SP ABS + TCS

My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946

I have the same problem as Forde, I just fitted a MM 2 into 1 exhaust and when I close the thorttle the exhaust bangs loudly, I try to change the CO in 13, 20, 25, 30, and even 50 but it bangs out anyway.

I have the AIS removed. What should I try now??

Kev, you talked about idle speed, (I�m spanish) maybe is what we call "ralent�"? (when the bike is started but the throttle closed).

Thank you!!