Cycle News - Archive Issues - 1980's

Cycle News 1989 10 25

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/127214

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ADVERTISERS INDEX A&A Rac Service • . •• • • • ••• • •47 ing AFM , 36 Action Yamaha Of Edison ••• •• • •• 48 Aerostltch Riderwear •• • • • • • • •• •48 AirtOne Inc • •••• • • •••• • •• • • • •46 AI Baker Racing • • • • • •. . • • •••• . 42 American Hond• • • • • •. . •. . .. • • • •5 American Honda Western Zone • •• . 23 American Jaw, lt d. • • . . • . • • . • . . 43 Amentan Suzu Motor ••• . .• ••• • •9 ki AmericanTrials AUD • . • • •·• • • . . 36 e Ame rican Yoko Inc • • • • • • • . • • • . •42 1990 Yamahas Continued from page 19) The bik e will be included in Yamaa 's 1990 ro ad ra ce co ntingency rogram , and technical assistance ill be available throughout th e year rom Yamaha technicians. The liquid-cooled, 749cc fourlinder powerplant is both 23mm .horter (th anks to a n oversq uare bore nd stroke) and lighter than previous FZR750-ba sed engines sold in th e U.S. The FZR750RR features tita nium co n nec ting rods, and tworinged pi stons. The more co mpact e ng ine allows th e en gi ne to be posi tioned more vertical th an befor e, gi vin g the bik e a shorter wheelbase. In addition, th e three intak e valves for each cyli nder ha ve been enlarged from 21 to 23mm, while the two exhaust valves hav e in creased from 23 to 24.5mm; com p ressio n ratio is set a t II : I. Four 38m m flat-slide Mikuni carburetors feed th e four in-line cylin de rs with a ir being supplied by Yam aha's F.A.I. (Fresh Air Inlet ) system. The FZR750RR is eq uipped with electr onic ig nitio n and Yam aha's EXUP exhaust co ntrol system ; but unl ike th e FZRlOOO, th e FZR750RR uses a butterfly-type EX UP valve rath er than th e FZRIOOO's rotary-type. The FZR 's spares kit includes forged pi stons, rings, clutch plates, gask ets, co mp lete selection of jetting and additional gearing. Other cha n!?es from previous models begin wah. th e steer ing head angle, whi ch has been reduced to 24.5 degrees with a trail of 100mm, and a new triangulated Deltabox alloy swingarm. The FZR750RR uses a 43mm fork and a full y-adjustable Ohlins rear shock; twin 320m m floatin g front discs; a single 210mm . floating rear di sc; V-ra ted, 120/ 70VRI7 Michel in radial s up front a nd 170/60VR 17 o n the rear; 3.50x17 front and 5.50x 17 rear cas t-alloy wh eels; 20-liter fuel tank; a nd a n electron ic tach . T he bik e weighs in at 440 pounds dry. Ya m ah a ' s cham p io ns h ip, winn ing TZ250 features 19 changes fo r 1990. Those incl ude: cylinder head sha pe and size changes 10 redu ce engine weight; co mbustion chamber shape change to improve p ow er ; cy lin de r bod y/h ead bolt pattern change to bett er control heat expans ion; a narrower crankshaft to allow ' for a lighter, more compact engine case; more compact Mikuni TM38-t yp e ca rb u re to r bodies to reduce weight; larger reed valves for in creased engi ne intake; new exha ust pipe dim ensions for more p eak horsepower; a larger wat er pump fo r 13% in crease in wate r flow ; a larger radia tor with more coo li ng co res to in crease coo ling capacity by 6%; th e dri ve cha in is moved left an addition al 5mm to allo w for a wid er rear tire; engine is positioned 25mm fo rward and ang led an additio nal 4.5 degrees for better weig h t di stribution; wh eelbase has been sho rte ned 25mm; rear shock absorber's stroke movem ent decreased by 5mm to help redu ce wear a n d h eat build-up ; fairin g is cha nged for 5% m ore ae rody nam ic efficiency; front and rear brake calipers are larger; rear tire size has been in creased from 3.25/ 5.7 5-RI7 , to 3. 80/ 6.00-R I 7; rea r wh eel size has been increa sed to accept th e larger tir e; steering caster an gl e is decreased from 23 degr ees/ 30 minutes to 22 degrees/ 40 minutes; steering offset is redu ced from 42 to 37m m. Eac h TZ250 will co me with a comp lete spa res kit and will be sold o n a first-com e, first-serve basis for $13,000. Yama ha is posting co ntingencies in the AMA 250cc Grand Pr ix Series poi nt standings, with $3000 being aw arded to the ser ies ham p ion, $2000 go ing to th e runner-up and 1000 goi ng to th e th ird-place rid er.• Andre." H onda/ SuzukJ . .. • • •• • •45 AndrtM Y amaha-K awasaki ••• • •• 45 Arai Helmets • • • •• • • • • • • • • ••• •41 Arias Industrie • • •••• • ••• •• • •• 4 9 s ATX 49 TV A Engineering•• ••••• • ••• • • • •40 Baja Off Road Tours . . .. .. : .. ... 43 Banzai Bros •• • •• • • • •• ••• • •• • •41 ng Bernett TooJ & E • •• • • • • •••• • • 48 Bates Industries • • • • • •• • __• ••• • 47 Beach yamaha • ••• ••••••••.•• • 45 BelRay 41 BeU Helmets • •••••• ••• •••• • •• 4S Berts Motorcycles ... • • i • . . • • • • 36 ' Bley Engineering . • • • •.. • .. •. • •40 81u. Sky Cycl. Supp ly 47 8MW 01 Oa"ona 42 BMW Of North America • •• • • • ••• 47 Bollenbach Engineering• • • • • .• • • • 43 Bridgestone Tire. . . . . . .. . . . • • . . 48 British Only • •• • ••• • . • •• • •• • •. 49 Buffalo Number Plates • • • • • • •• • •48 40 C.C. Specialty Cag~a North Ame rica• . • . . . • . • • •47 Camel Sunglasses . • • • •.. • • • • • • 52 Camp Coker Motorsports Park• • • • • 19 Carb Parts Warehouse. __. _• • • • • 42 Cans Honda • •••• •••••• •••• • •47 Carolina Whee & Props ~ •••• •• • 42 ls Cent al Co MIC Assoc •• • • • • • • 37 r ast Championsh Cup Series • •• • . . _. 43 ip CIlang. 01 Addre" 23 CIlaool Mig. Co ·. 47 Cha rleston Cust~m Cycle • • • • • • •• 45 Cart e Mfg. Company _•• • • • • • • • • 43 CMC 36 eonidesc:ope • •• . • _• • • •• • • • • • • 42 Connectiart Cycle Works•• •• ••• •• 49 Cosmopofrtan Molors 45 CRC . . . . .• . • . .• • . • . . • • . • •37.39 Cycle Engineering • •• • •• • • • • •• . •40 Cycl. Recycl. .. . ••• . • • .• . .• • . •41 Cycll ServiCI Inc. _• _••• • ••• ••• • 39 Cycle Speciahie Athens s • _• • •• 49 Cycl. Sp.cialty 40 0&0 Motorcycl. Sfmc a . . • .•• . • •48 0&0 Perform.nce Exhaust • • • • •25.49 useee . . • • .•• ••. . • • .• • .• • . •• 49 Dealer Ad •• ••• • •• • • •• • • • • • • • 39 Denn K . • • • _.. • •• • • • • • • •• 49 is irk Desert Motor Sport • •• _. •• • • 38.42 s O... rt On~ . • •. •.••. •.. . •.• . . 49 Design Engineering Senr • • • •• ', _• • 25 Oirt& Road Worts 37 Donnie Han MX Academy • • ••• 49 sen Double Cross Racing Assn • ••• • • • 36 Dublin Kawasaki• • • • • • • • • • • • • • •43 Dunlop-ShariBan dinelli • • •• • • • 21.43 Duralube •• • •• • • • • • _• • ••• • • • • 41 Earl Mart Productions • • . •• • • • •• • 46 EastCoastSuzuki ••• • • • • ••• • • • • 47 EIIi' W. Taylor 49 Engine Dynamics Co•• • •• • • • •• • •41 Eric's Motorcycle Co•• • • • • • • • • • •40 ErtrudeHone Abrasive • • • • • •• ••• 40 F&l Company • . • • •• • . • . . • .• . . . 43 Factory Connection• • • • • • . • • • •• • 46 FactoryPipe Products •• • • ••• • •• •43 Falicon Perfo rmanc Eng • • • •• •• • 49 e l Northwts1Sleeve Eng . Wrk• ••• •• • 45 O ·N.al U . • .. • . • ..• . • •. .• . •48 SA Oaliland Spt. C .. • .. . • • • •. . ••• 25 tl Paul Thede's Rate Tech . • • • • •. • •49 Performante Machine • ••• ••• • • •• 43 Personal Watercrah 111. • •• • • • • • • •21 Petaluma Mit Center. Inc • • •• •• • 49 Pirelli Tire Corp • • •• • • • • • • • •• • •49 PJ I Co rp 47 Pomona Valley Kawasaki • • • • •• •• 39 Power Mist Ra cing Products •••• • •42 ProAction Innovations • • • • • • • • • •46 Pro CmJn Racing 48 42 Pro Cycla Pro Italia Motors •••• •• .••• •••• 41 Pro Pad Products • ••• • • •••••• •• 42 Pro Plates •• •• •• • • • • • • ••• • • • • 41 ProTracTrailers• • • •• • • ••• • •••• 42 Pro·lap 46 Pro-Te Dallas Baker • • • • • • • • •• •46 e Progressive Suspension • •• • •• •• •46 Pro,pectorsMlC Club 25 PSI. Inc 47 RJ. R.ynold, (Cam. II• . . . . . . . . . . 40 R.1t Chain • • • • • • • • • • • • • • • • • • •45 Racing Engine COmponems •• • • , •• 49 Racing Engine Services •• • • • • • • • . 49 Ridersville Cycle •• • • • ••• • •• . •• •36 Riner Cycle • • •. • • • • • • • • • • .• . •48 Ron Wood Ra cing •••••••••• • •• • 46 RSC Performance • • . •••• .• • • • • •41 SRA 38 47 San Jose 8M MIC Clr W SantekTrailers • • • • • • • • • • • • • • • • 46 Scon', MIC & Jet Ski .... .. .. .. 40 Shoei Safety Helmets • • • • • • • . 21.40 Shoup Ent rprise • • • • _• .• • • •• .• 46 e Slater Bros • • • •••• ••• • • ••• •.• •• 43 Sloans C e Sal ycl 49 SM X 36 Southern lief C e. Inc . • •• • • . . •43 ycl Sponseller MI C Company• .•. . • .. 48 Spon Tracts 25 Sport Racing Gasoline • •••• • •• . • 43 s Sprocllel Specia~s1s ••.•.... . .• . 45 Steve Sum Performance • • • • • • • • •4 7 Stokes Honda • • • •• • • • • • • • • • • •• 45 Sudco In •• .••.• . . .• .••••• . •49 n Sunstat Engineering •••• • • •••••• 47 Supmrapp Industries US • • • _• • • . 41 Suspension By Jake • • . • ••• •• • • . 49 SUlUki Kawasaki Coumry ••• • • •• •41 SUlu ~ 01Palm Beacll 38 SX Print 33 Tho Tryals SIlop 48 Tony 0 MX School • • • .•• • •• • • •• 47 Too mey Racing • • • • • • • • • • • • •• • • 41 TSR.• • . •.. . . ... . • . • . . . • .. • •45 49 U.S. T,u b a~ U ltimate Metal Finishing Corp • _• •• 42 UniFilter. me .•. ... •.. .•••.. ••46 USA lubricants • • • • •• • • • • ••• • • 25 VaRC1! & Hines En terprise • • • •. • • •4 3 Varner Rac ing • •• • • • .• • •••. •• • 49 Video Thlllt ar • • • • ••• • • • • • • • • • 35 V ideos B Professor Ba • • •• • • •48 y iley Walt-Schaffer Cycle SUp . ••. •.. .. 48 WamAd Collectible •• • • •• ••• •• 25 s Web-Cam • • • •• • • • • • •• • •• • • • • •46 Wh 1Worts .. 38 Wheelsports • • •• • •• •• • • • • • ••• •45 Whit. Br s Cye Spec . .. . . • . .. 36,49 o Whinier Honda/Kawasak • •• • • • • •47 i Williams Honda • • • • • • • • • • •• • •• 49 Willow Springs Raceway ••• •• • •• • 38 Wiseeo •• • • • • • • • • • • •. •. . •..• •48 Yamaha Motor Corp • •• • • • • • • • • • 37 Yamaha Suzuki South .. • . . •. • . • •41 Yoshimura East • • • •• • • • • • • • • • • 46 ZeroGravity• •• • • • • •• • • • . • ••• .4 8 Fau Gass •••• • • •••• ••• • • • . . _42 Fasl By Ferratei • ••• • •• •• • • • •• • 45 Finish Iine Products • • ••••• •• •• • 43 Fischer Competition Cycle • . • • •••. 40 FMF 41 Fredette Racine Products • • • • •• •• 41 Freedom Cyc:les • • • • • •. • • • • • • • • 48 Freewheeling H ooda-BMW . • • • •• •48 G.T.G. Em erprises •• •• •• • • • • • • • •41 Galia Racing • • • ••• • • •• • • ••••• 46 46 GIMS Honda T_ Gary 8ail..,,· MXSchool 47 Gear Ratewear • • • . •.. • •. • • . •. . 48 GFI Ra cing : . . :':' . 38 Gio CA Moto • •• ••• _. _. . • • • • •. 48 Gr t MI CAd el ventures • • • • • • •• . . 49 Grtenatr!s Cyde • •• • • • • . • • • _• . 40 Gu stafssoRPlastics • . _. _•••• • •• 45 H&H KTM/ Hu ama • ..• .. . •38.47 ,q. Halls Harley David son• • • • • • • • •• •45 Halmar Enterprises • •• • •• • • • • •• •49 Hayward Ho nda . • • • • • • • • • • • •• • 48 Heilfs Hodaka •• .•• • • _. _• • _• • •45 Heli ·Mod ified• • • • • •• • •• • : ..• .. 42 He rcules Distributng • • ••. •. • • • . 27 i H i·Point Racing Products . • • • • • • • 42 H ickman Rac • • • • •••• ••• __• . 45 ing Hogan Cycles • • • • • •• • •• •• • • • • • 49 , Honda 01Atlanta • • • ~.• • • • •• . • • •41 Honda Shock Specialist • •• • • ••• • 42 Hoppe & Associates • •• • • • •• • ~ • • 40 Hot Racing • ••• • • • ••• • .• •.• . •. 46 Hugh's Bultam . . • . . ... _. . •• . . . 45 Hurcen Motorcycles • • • • • • • • • .• . 49 Hutchinson Cycle • .• •• • • . •• • • •• 42 Hy·Tech 45 Hydro-Sol. 4S I.C.E 37 I.C.O. .•.. .. .•. . ••.• • . . • .•• . •42 Inland Empire SUlUki •• . • •• • • • • • 45 lnter-State Oil Co•• • •• . .• . ••• • •49 Iron Ho MIC Supply• . • ••. . . _. 41 rse J8 Ra Produtts • • ••• • •• . •• • .• 46 ca Jetmar• • •• • • • • •• • •• • • . . • • • • •43 Johar Inc •• . • •• • • •• • • • • • • __•• 41 K awasaki Mot f Co • • • • • • • •• • • 13 O rp Kawasaki Of Riverside • • •• • • • • • • 49 Ken MiIIly Ent rprises •• • • • • • • • • 42 e Klemprs Tnumph •• • • • • • • • • • • • •48 K Special Formu • • • •••• • __. 4 7 lott la Knight Racing Frames. • • • • • • • • • . 48 Knobby SIIop Inn 40 K osman Specialties • •• .•• _•• •• • 42 KTM 01America.••.• .• • . . •• .• • 40 K ustom KIah Pert Spec . • .. • . . • •45 48 laidig', Cycle La Highlands Kaw Y • ••• • _. 46 urel am Lectron FuelSystem • • • • • • • • • • • 49 s los Angeles Sleeve Co••• • .•• . • • 21 lou's le athers • • •• •• • • • • • • • • • • 42 LRD Performance • ••• • •• • • • _. • _41 M.P.C . • . . .• . . . .• • . . •• . • • .• . 49 . Magnum Distribution • • . • • • _• ••• 40 Malcolm Smilh M.C 38 Maxima • • • • • • • • • •• •• • • • • • • •• 49 Megacycle Engineering•• • • • • •• •• 49 Metro AtlantaCycle •• • • • • • •• • •• 43 Mike Cycle Parts • • • • • • • • •• .• .48 's Mikuni America •• • • • • • • • • • • • • •41 Mouse Racing • • • • • • ••• • • ••. •. 48 Moto Guzzi Cla ssics ••• • • •• • • • • • 40 Moto·Ea,1 USA 42 Motocross Fox • • • •• • • • • • • • • • • • 47 Motorcycle Cen • • • • • • • • •• •• • 48 ter MOlul Oil 41.43.45 MS Racing • • • •• • • • •• .• • •• • • . •48 NMA 36,38 Neil Keen • • • • ••• • • • • . • _. • • • • •38 Noleen Racin~ Inc •• • • • : • • • • . • • 41 Northend Cycle Salvag • • • ••• • • • 49 e ~ N .... V ...0 o ..... u o . - - - - Cycle News Inc. Product Order Form - - - - . I Fill out completely and prilff clearly. SfIftd onIer to Cycle News Products. P.O. Box 498. Long Beach. 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