RPMs SUZUKI RM167PRICE: $1700.00APPLICATION: 2001 Suzuki RM125 In stock condition, the 2001 Suzuki RM125 is already a winner. As a matter of fact, it dominated our ’01 125cc MX Shootout. The RM’s potent motor was definitely its strongest feature, and the motor can be raced competitively even at the pro level in stock condition. Still, we wanted to see how much better we could make the RM125 motor. Last issue, we sent our bike to Bill’s Pipes for a completely legal modification and the bike absolutely hauled butt. Still curious to see what power lurked inside, we called our mad scientist buddy Rick Peterson to see what he could do with our little yellow bike.
Peterson’s RPMs specializes in creating oversized big-bore engines for all brands of motorcycles. Our first experience with RPMs came several years ago when he pestered the editor to try his personal bored-out Yamaha YZ167. The bike was fast¿real fast, but it vibrated and rattled a little too much for our taste. Our ’01 Suzuki RM167, however, runs like a champ. Peterson has learned a lot since then, and our ‘Zook runs crisp, smooth and vibration free. We turned our intermediate hero Josh Stice loose on the bike and he freaked out. “This thing is incredible!” cried the Hatchet. “Can I race it this weekend?” For the record, Stice owns a Yamaha YZ250F.
On the dyno, the results are impressive. Stock, our RM125 pumped out 29.3 horsepower at about 11,000 rpm and 14.4 ft-lbs of torque at 10,000 rpm. When RPMs was done with the RM167 conversion, the bike pumped out 39.5 horsepower at 11,000 rpm and 19.4 ft-lbs. of torque at 10,000 rpm.
On the track, the results are equally impressive. Low-end power is incredible¿crack the throttle open and the bike goes! Power is boosted throughout the powerband, and the bike is much easier to keep on the pipe. Mid-range is unreal and top-end power is almost scary. We’re willing to bet that this bike is faster than a stock ’01 RM250.
So when and where is this bike legal? In the Vet classes, of course, but thanks to the increased displacement it is also legal in the 250cc class. Whether or not you choose to sneak into the 125cc classes with a RPMs big bore is up to you.
RPMs offers an unbelievable selection of motor kits, including 125cc-class legal 134cc kits for all brands. If you absolutely crave more horsepower, RPMs is the place to call.RATING: 10Call 626/967-3052 and tell Rick that TransWorld Motocross sent you.