Cycle News is a weekly magazine that covers all aspects of motorcycling including Supercross, Motocross and MotoGP as well as new motorcycles
Issue link: https://magazine.cyclenews.com/i/127193
nitely race ready, but there 'is some room for improvements. In the RM X's case, we wanted more bottom end and quicker and harder-hitting throttle response throughout the . power range. The changes P roCircuit made to our R MX are the ' same mods that have been performed to the RMXs of the entire factory Suzuki enduro team, consisting of defending National Enduro Champion Randy HawkinscDave Bertram and Charles Halcomb. , Pro-Circuit cleaned up the transfer ports, changed the profile of the exhaust ports, better-matched the exhaust power-valves to the cylinder -a nd replaced the exhaust pipe. For ~ a silencer, we installed a stock R M . I aluminum muffler wi th a Cobra Sparky bolt-on spark arrester. We've also used the- more inexpensive .,Cobra H ush Puppy silencer/spark . arrester on the R MX with excellent , resu lts. (The Hush Puppy silencer/ , spark arrester is much cheaper than f buying a stock R M silencer and a Sparky SA - approximately $109 cheaper). Despite all the motor changes, carburetion was left alone. O nce on the trail, we ended up wi th a 250cc enduro bi ke that really roosts. Pro-Circuit gave us exactly what we wanted fro m the R MX stronger low-end andsnappier throttle response. Basically, the P ro , Circuit RMX feels like a pure-bred motocrosser with all the trimmings of an enduro bike. Although the power comes on harder now, it still doesn 't hit qui te as explosive as the R M, making it acceptable on the trail. ' . Despite the harder h itting motor and crisper thro ttle respo nse, the Pro-Circuit mods didn't make the RMX any harder to ride; if anything, it made it easier to ride and easier to ride fast. Suspension-wise, we left the R MX's alone, except for putting in a fresh supply of oil in bo th the fork and the shock and ad justing to the external rebound adjusters, according to the terrain and preference of the rider. Bottom Line What Pro-Circuit did was make 'two already good-performing offroad bikes into two outstanding trail burners, machines even the not-soserious woods rider would love to p lay around on. In their respective classes, the Pro-Circuit-modi fied RMX and KDX are easi ly the best off-road bikes we've ever had the . p leasure of swinging a leg over. Both bikes are National-quality material. Just ask Cunningham who has two National Enduro overall wins on his KDX200 this year and Randy Hawkins who has two wins under his belt on his RMX250. And if it's good en o u g h for them... · • Price List: Hollister Hills -a Great Motolross ~ Weekendl ~ ~ Saturday, June J7th & V' . Sunday, June J B,,,' SAN C T IO NED America Meets Europe in the 500cc International Event of the Year. The 125cc Support Class will Feature the Exciting Top National Riders. Saturday, June 17th: USGP Pro-Amateur Racing Starting at 9:00 am with Top 125cc Pro Riders going into Sunday's Support Event - 500cc Practice A Full Race Day ' Sunday, June 18th: Gates Open @ 6:00 am - Practice First - Then: Two 500cc Motos Two 125cc Support Motos USGP Pro-Amateur Day - Saiurday, June 17 AMA/PRRA Sanctioned Pre -En try On ly ! Riders Lim ited t o 200 Tot al With a M in im um of 15 Ent ri es t o Form a Class (No Pee W ees or Old Timers) All Other Classes available incl uding Qu ad ATVs. Ent ry Fee $75.00 includes Saturdays Event Entry, a Sunday USG P Ticket , an Event Sh irt, and M uch M or el Th is Even t W ill Be Conduct ed in Gr an Prix Sty le, a 25 Minute Mota Plus Tw o Laps. Gat es Open @ 6:00 am , Pract ice @ 7 :30 am, Racing Beg ins @ 9 :30 am . • • • • • Pl,nty of Free Parking Shuttle Buses to and from L ots Ov.mig/Jt Camping at AJ jacent SV RA Coo/.rs AHowed No G Containers, Please! lass Directions to 'Hollister Hills: From Hwy 101 North or South Exit Hwy 156 East and Proceed to Union Road, Right on Union Road to Cienega to the Track. From Interstate 5 North or South Exit Hwy 152 West to Hwy 156 to Hollister and Join Hwy 25 through Town, Turn Left on Nash, Right on Cienega, Follow Cienega to the Track. For Further Information, See your local California Call the Hollister Hills Track at: ~~~~::a~~I~~I:~roU9h: 408-636-0630 ~s.s - T,acsr~~STE~' THE W H E R E HOU S E & TOWER RECORDS 41 S/762-~SS "THE BEST IN THE END" Kawasaki KDX200 Forks Mods • . . . . . .. • ... $45 Shock Mods ..• .•. . .•• $130 Cyli nder/ Head Mods . . . $225 Exhaust Pipe •.•...• $149.95 Total. . • • • • • • •.•. $449.95 Suzuki RMX2 50 Cylinder M s .. •• • • . • $165 Exhaust Pipe • . . . . • . $149 .95 Cobra Sparky 5 .... $39.95 (Cobra Hush Puppy Silencer/SA •.•. • . $99 .95) Stock RM250 Silencer (part #1431 0-28COO-H01) ,.•••• •• • ••••.• $168 .81 Total. • •••••••••. $523.71 (Total [w/Hush Puppy] •. •. ••....... $414.90) Team Har ley-Davidson's Scott y Parker won the M ay 21 st M ile at San Jose on his SUPERTRAPP equipped machin e. Fast qualif ier Doug Chandler put in a spectacular ride for 2n d place on the Hank Scott t uned, D&S Racing, SU PERTRA PP sponsored Honda. Fellow facto ry Har ley rid er Chris Carr took 3rd usin g, (yep, you guessed it) SUP ERTRAPPS as w eill A clean sweep! That's FAST N OT FICTION I S_ee your local dealer for the SUP ERTRAPP edgel C or write for SUPERTRAPP"S latest catalog. We carry a comall plete line of exhaust systems for Street, Dirt. ATV & Jet Skis, SUPERTRAPP INDUSTRIES 39 10 Seaport Blvd., West Sacramento. CA 95691 (91 61372-5000 FAX (9 16) 372-1 354 _