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/126801
1985 SERIES OPENER! HOUSTON ASTRODOME FRI, FEB 8· TOURIST TROPHY -... SAT, FEB' 9 SHORT TRACK TIME TRIALS 1 :00 PM RACING AT 8:00 PM High-performance version of FXRS has 2.0-inch-longerforltsand dual front discs. compression ratio had been lowered LO a pathetic 7.4: I. Horsepower. was way down - yet the engine tili demanded top-grade premium fuel. The first item on the agenda for the improved engine was to get the compression back up to where a r~son able amount of power could be extracted from combu tion. Harlev's engineers came up with a comeroporary O-shaped combu tion chamber, dubbed the" ide $qui h Combustion Chamber" ( CC). As the pisLOn reached TOC. combustion gasses would be "squished" over the flat side of the O. thereby forcing them into a smaller combustion area with a more centrally-located spark plug. This squish action also gave the gasses a great deal of turbulence. which in turn promoted faster flame travel for smooth combustion. Compression was upped to a reasonable 8.5:1, and as long as the rider isn't intent on lugging the engine. the new configuration will digesttoda 's crummy gasoline. Also important on the cylinder heads is the improved breathing. Intake and exhaust tracts have been straightened. with special attention paid to the intake tract to promote swirl. The bottom line for the cylinder head modifications is performance: horsepower is up I~. and torque up a fat 15% - from the same engine ~ayout and displacemenL Maintenance hasn't been overlooked, either. The valves are actuated by push rods which terminate in automotive·style self-adjusting h 'draulic lifters. Ignition is maimenance-free electronic. with an electronic vacuum advance sensor. Fuel mixture is handled by a single carburetor - no synchroni7.3tion is required. Should the engine ever require major service. the heads and pistons can be removed with the engine in the frame. thanks to a three-tier rocker box. Power is routed out of the engine via a double-row primary chain. ew for 1985 is that this chain is immersed in an oil bath for lubrication. Previous incarnations of big-inch Harlevs routed the crankcase breather onto the primary chain, and the chain rei ied on the resulting oil mist for lubrication. This oil bath svstem is independent from the engine'oil. and must be LOpped up and changed as a separate system. The primary chain is connected to a sprocket machined 0010 the perimeter of the clutch basket. The old dry clutch is gone, and for 1985 the clutch is designed to run wet in con- ADD D TTRACTiON! A UO RACES-;;; Don't miss Honda's RICKY GRAHAM battling to defend his #1 plate against the nation's best, including 1983 Grand National champ RANDY GOSS, BUBBA SHOBERT, JAY SPRINGSTEEN, STEVE EKLUND and many more! -;dSA!""U~OAY N\GH"f . 1\ / o"'L 1, "V Y V vV <~ ,...~, / .1\ PLUS! NISSAN'S MOTORCYCLE AND ATV EXPO! The world's'largest consumer show comes to the Astra Arena (next to the 'Dome) FEBRUARY 8, 9 & 10! Sunday's expo features an ATV LEARN TO RIDE PROGRAM! Stop by your participating Nissan dealer or area motorcycle dealer and pick up a coupon good for $1.00 off Expo admission! - . -• • • •- • • • •- - -• • • •- • •- . - . - - . -• • • • • 1 ORDER NOW BY MAIL! FRI SAT Ticketa (" $15.00 (StllrtlFinlah) KMt.underl2,HAlFPRICE.S7.SO --t--- Tlckela(1I S12.00(FI.ld/Meullni....) Klda under 12, HALF PRICE·S6.00 Time Tr"l ticket. (u $3.00 (You must have a vahd ta<:e ticket) _._ S2.00PEATlCKETSEAVlCECHAAGE _ CNEWIN50 TOT AIIOUIITDlCLOHD -S _ $ _ • $ _ • _ _ :I: s,~ as as =s .. _ _ Plene enclose a self·8dd~s_. stamped I I envelope .net mail t o : . N.tl_1 Motorcycle c;.~~:::::~. Hou.ton, T•••• 77001 Mail ord.ro received alter Januar~~'a~~will : I I I CHARGE BY PHONE* ON MASTERCARD OR VISA 713/799·9555 ·PHONE ORDERS SUBJECT TO SERVICE CHARGE. RACE INFO 713/526- 7666 HOU:;": ~TS: Produced By ASSOCI&noN I PACE Management be· Will Cail Window. Make check/money order II _. Find it fast in the Cycle News Dealer and Services Directory. The time to start is now. There's a powerful motive for becoming a Suzuki dealer now. The profit motive. Our lineup of new motorcycles and 4-wheeled Quadrunners means powerful profits for our dealers all year long. U.S. Suzuki is now accepting applications for new dealers in selected areas. A moderate investment and suitable facility are required. Suzuki supplies a full product line backed by national advertising, sales support and training. You'll profit from the experience. The sensation of SUzuki. MOTION SPORTS Shreveport. Louisiana Distributor of Quality Motorcycle Accessories DEALER ONLY U.S. - 800/482-8124 loui8iaNl- 800/482-8125 FtH'tIft._ cont«t: OeM' Appo;,WrMnt OttP/Krnwmt. u.S. SUZUKI MOTOR CORPORA nON, 3251 E. I".",.ri.' Hwy., P.O. 80lt I '008r... CA 92621.714-·996·7040 65