Time tested: 10 years/24,000 miles
What’s good? Quite a lot: it’s British made in stainless steel, throaty without being anti-social, very high quality and weighs around a quarter of the standard XT660R system. It also reduces the bike’s rear weight bias, which can make the XT wobble at high speed.
I’ve just fitted this MM system to my own XT, but my son’s identical bike has run a MM system almost continuously since 2006. That bike crashed at least 30 times en route to India. The silencer has a few dents and needs re-packing; otherwise it’s as good as new. Fitting is easy but you need your own gaskets.
What’s not: The pipe runs inside the frame on the right, so you need to relocate the rear brake master cylinder reservoir (bracket supplied). MM supply two silencer straps but I couldn’t make both fit on my bike. No matter: we did the Hafren enduro with just one.