i just fitted mine, how the hell do you tighten the inside left exhaust nut i have nothing that can get into there so havent been able to yet.

havent ridden with it yet due to that and i havent fitted the sensor yet either. but its ridiculously loud with the baffle out i started it up to see.

the clamp that came with my kit for where the can joins the pipe broke for no reason but no biggie.

I just put one om my XTR a week ago...
NO issues with fitting...That stud nut
is a pain... I used a long ball end allen key
no prob then... as the ball works on angles..
see thread below...

http://www.xt660.com/showthread.php?...ewpost&t=18211

i got mine all fitted up there bought some extra long allen keys and used a spanner for leverage

got another problem now lol

how hot should these exhausts get?? i started the bike, the heat the pipes were giving off was crazy. the bike was idling for maybe 3-5 minutes and i gave it a couple of revs to hear the new exhaust but didnt rev it high, but i am sure i saw the front pipes starting to give off a dull glow. if i had left it running longer i think they wouldve got red hot so i turned it off.

i went to my mate who is a mechanic and he had a special socket for removing them it looks like a plug socket but with a slit up it for the wire to stick out

The right side/port gets a lot hotter than the left on the MM system.
i put it down to the diffrents in the tuned length of the header pipes..
Stainless heats up & glows very easy...

Even the stock headers will glow if you leave them. very normal.

MM make a good pipe...
but they are no good with lowering links "40mm"
the rear caliper dented the can.. & the tyre
was also hitting the gaud...
think the XT is a bit piggy for jumping over
big bumps etc...

Not sure you can compare the XT to the XR. Ones a road going dirt bike and the other is a dirt going road bike. Both are good at doing what they are designed to do.

I love my MM exhaust. Had a hard time with the exhaust nut as well but like the others I had to buy a large size ball type allen key set and that sorted it out well.

As for the sensor, I also had a really hard time getting that off as well. At the end of the day I bought a MASSIVE shifter with plenty of leverage and just used my man-strength to reef it off. I had my cranky pants on for about a day trying to get that thing off haha!

2 into 1 systems MM vs OTR
 

Hi all, I have been agonising over this for ages. Have some rides coming up and am keen to get rid of those stupid pipes under the engine. I have been in touch with Off-The-Road www.off-the-road.de and asked them about their systems.
Word is in other forums that the MM system is good (made by Scorpion) to MM specs. There is mention of quality control issues (as seen in the welding dag mentioned in this thread) and fitting difficulties. OTR make a number of systems with cans of SS, titanium & carbon, I can't go past the Akrapovic carbon can.
What you can also do is purchase a pre 2007 model without the lambda sensor (makes the systems cheaper as well) and an "O2-sensor eliminator" which I assume sends the ECU a 'nil' signal so that the RPM variability & surging is less.
Once fitted, you will have 6cm more ground clearance, less weight high up on the bike, and an ability to fit an engine guard close to the frame.
Fitting a centre stand is still possible (OTR suggests the 'SWM' centre stand) so that you are able to repair your tyres more easily in the bush.
Thanks for the great information.