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"So maybe Two Brothers Racing isn't quite the household name that some of the other brands in this comparison are. That doesn't mean that it can't take its decades of experience in AMA road racing - and more recently its affiliation with guys like former AMA motocrosser Joel Albrecht and AMA supermoto racer Steve Drew - and build a gnarly pipe. In fact, by looks alone, the M-7 might be judged a winner.

The M-7 is a beautiful three-piece system that features a lot of bling in the form of a snazzy carbon weave in the muffler and gold anodized header flange endcap brackets, sound suppressor and muffler mount. One thing that sets it apart form the other three-piece units is that the muffler bolts to the midpipe rather than being attached by springs. Overall, the system looks too pretty to be dragged through the dirt. It weighs in at 5 lbs., 17 oz (sic). Mounting was a little finicky.

The M-7 was right in the thick of the chase on the dyno, recording peak horsepower of 47.56 hp at 8700 rpm, and peak torque of 32.11 ft./lbs. at 7100 rpm. Even better, when we threw in Two Brothers Racing's P1 Power Tip, the M-7 picked up both horsepower and torque, checking in at 47.9 hp at 8700 rpm and 32.14 ft./lbs. of torque at 6900 rpm, respectively.

On the track, Bard pointed out that the throttle response is very snappy with the M-7, but that it feels more like the stock RM-Z system at low revs. He also said that while the systems features a strong midrange grunt, it tends to feel a little flat up high.

n open mode, the M-7 matched the noise output of the Big Gun EVO R during out sound test, clocking in at 101.2 dB, but adding the P1 Power Tip dropped it all the way down to 96.8 dB. Keep the suppressor in place and you could just about ride your M-7 equipped moto machine all the way to sportbike night."

Excerpted from MXi Motocross Illustrated magazine.
Vol. 2 Issue 3 p. 52
www.mximag.com

 
 
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1985-2012 Two Brothers Racing, All Rights Reserved 1.800.211.2767   401 S. Grand Ave. Santa Ana, CA 92705

All Two Brothers Racing products are designed, marketed, and sold for use by consumers 13 years old and older. No Two Brothers Racing products can be sold for use by children 12 years old and younger per the Consumer Product Safety Improvement Act of 2008. All TBR products are intended for CLOSED COURSE COMPETITION & images are for fitment purposes only!