Cycle News - Archive Issues - 1980's

~ ~ . , ~ 00 O'l ...... ~ t- C'J .... iJ.) c..o 8 iJ.) ;> 0 Z The rider's view ofthe instruments, including a centrally-located tach and an offset, 160-mph speedometer: They're foam-mounted . idler sp ro cket mounted between th e ca mshafts, in add itio n to the usual tens ioner shoe on th e rear ru n o f th e cha in. To red uce friction a nd air- flow restricti on , the valve stems (both intake a nd ex ha ust) are 5mm in stead of th e GS I 150's 5.5m m. T he air bo x capacity is 8.5 quarts. an optim u m size di s, co vered by tr ial and error, th e Suzu ki mensay, a nd thecarbs are 34mm fla tslide CV Mik unis. T he a irbox is position ed above a nd beh ind th e carbs, in a cavi ty built into th e rear of the gas ta n k. T he ex ha us t system is a h ea vy fo ur -into-o ne with a large hea t shield to p rot ect the pa ssen ger. T o deal with th e extra power of th e G SX R 1100 wi th o ut encou nteri n g cI u tch-ba sk e t a n d ba ck ing-p lat e p ro blem s typi ca l to hard-ridden or raced GS I150s, the GSX R I IOO has a steel basket, (vs. the GSI 150's a lu min u m all oy basket ). T h e en gine is packed into a new a lu mi n u m-a lloy frame, one developed, in sid ers say, with th e lesso ns learned from th e GS XR750 in mind. It is, lik e the GSX R7 50 fra me , made of extru ded, rectangu lar-section alu m inum a lloy tubing , a nd that tubing is n ' t si mply shaped like a bo x in cross sectio n, but in stead has bu ilt-up ridge a t the corners, for 5% ex tra stre ngth . T he a lloy itself, developed especia lly for Suzuki's m o torcycle fram es. is called MR787 in Japa n , (it isn 't listed with th e American Alumin u m Asso ciation ), and incl udes a lum inum, zin c, and m agn esiu m. Accordi ng to Suzuki engi neers, the ma teria l is especially good for welding a nd for the Alumite (AUO ') su rface trea tme n t S uzu ki uses, a n d is stronger in terms o f tensile strength a nd resistan ce to p ro o f stress a nd elongat ion tha n the STKM 13A tubular steel used in so me Suzuki fra mes . T h e GS XR I 100 frame has la rger tubes a nd is ph ysica ll y lar ger an d The GSXR 1100 has electric-activated anti-dive and 12.2-inch floating stainless steel front discs with four-piston cal ipers. Suzuki GSXR 1100 Engine type .. • •. • • •. Oil -cooled DOHC in line-four Bore x stroke • • • • • •• 76x5Bmm D isplacement . . • . . ...• 1052cc Compression ratio . • • • •. • 10: 1 Carburetion • • (4 ) 34mm M ikuni flat-s lide CV Horsepower . • . • •. . • 128 bhp @ 9500 rpm Torque .. 77 lb.-ft. @ 8500 rpm Va lves per cy linder .• • • . . . . • . 4 Intake va lve size ..• ••• 28,5mm Exhaust valve size •• •• • • • 25mm Intake li ft • . . • . • . . . . . . . 8 .8mm Exhaust lift . .. • • . • . •. . 8 .2mm Included valve angle • • . • . • • 40° Intake valve timing .... • 42 -70° Exhaust valve timing ••• 65 -39° (measuring pt.) • • •••• .• 0 .5mm Starting system • . . .• .•• Electric Battery rating • • • • . . 12V 14AH Ignition . •. •. •• • • . • . • Electronic Lubrication •. • .• . .•. • Wet sump Redline • . • . • . • .• • • 10,500 rpm Rpm @ 60 mph . •. ..• 3800 rpm Primary drive • • • • . . Straight-cut gear Final drive • • . #532 o-ring chain Gear ratios Primary . •. •• • 73 /45; 1.622:1 Final • . • • • • • • 47 /14; 3 .357:1 5th . •. •.•.•• 21 /23; 0 .913:1 4th 23/22; 1.045:1 3rd 25/20; 1 .250:1 2nd • • • •• • •• • 31 /19; 1.632:1 1st • •• • • •••• • 31 /13; 2.385:1 Calculated speed in gears at redline 5th • •.• • •••••• . • • • •167 mph 4th 146 mph ... 3 rd 122 mph 2nd • • • • • • • . • . . • . • . • • 93 mph 1st • • • . • . . . .• . • . . . .• . 64 mph Frame • . . . . . . . • . Double-cradle. rec tang ula r-alumin um-alloy tube Rake • .• • . .• • • • .• .• •• •• 26.5° Trail • . . . . . . . . • • . . •.. . •. 4.6 in . Fro nt suspension type ... . Telescopic forks Fork tube diameter . • • • •• 41 mm Fro nt wheel travel . . • . • • • 5 .1 in . Rear suspension type . •• S ingleshock swingarm Rear wheel travel • . .. . •• 5.0 in. Front brakes . .. . . . •(2) 12.2-in. hydraulic discs Rear brakes •• . 8 .7-in. hydraulic disc Front wheel • .• .• .• 2.75x18-in . Rear wheel . . • • . • . • . 4 .0x18-in . Front t ire • • 110/80-18 Dunlop K701 rad ial Rear tire. • . 150/70-18 Dunlop K700 rad ial Cla imed dry weight • • . 434 Ibs. (437 lbs, Calif.) Certified wet weight .• 504 Ibs. (Cali f .) Overall length . .• • . • . • . 83.3 in . Overall w idth . .• • • . • • • •29.3 in. Overall height •• • .• •.•• 47.8 in . Wheelbase • • • • • • • • . . . • 57.5 in . Fuel capacity . •.•.•••.• 5 .5 gal. (5 .0 Calif.) Ground clearance . • . • • . • 4.9 in . Seat height • • ••• .. . • • . 31.3 in . Load capacity • . • . . . . • .• . N.A. Colors • • .• Blue/red; blue/white Retail price • •• • . • . • . • . . . N.A. ~ h ea vier, a nd doesn 't use G SX R750type lar ge, cas t side p lat es in the swin garm p ivo t a rea . in stead using ex truded rear downtubes, And the GS XR llOO's rig h t fro m dow n rube a n d engi ne cra dle unbolt to allow easy engine installation a nd rem ova l. I t's still farl ig h ter and sim p ler tha n a GS 1150 frame, weigh in g 28.2 pou nds (29% ligh ter th an the GSI 150 frame) wit h 60% fewer act ua l fram e co m pon ents. T he swingarm is recta ngu larsection extru ded MR787 a lu m in u m . Wh eelba se is 57.5 in ch es, a nd ra ke a nd tra il ar e 26.5° a n d 4.6 in ch es. T he sing le rear shoc k a bsorber is m ounted upside-dow n compared to th e GS X R750. with th e to p shock mount attached d ir ectl y to th e frame, ab ove th e swi ngarm p ivo t. T he lower shock mount is con nec ted to a lever th at p ivots on th e frame, a nd a n eccentric ca m 'p ivot bui lt into th e lo wer lever between th e frame m o un t an d th e shock m ount a tta ches to the swi nga rm via tria ngu la r p lat es. T he eccentri c cam system cha nges th e leverage ra tio accord ing to swingarrn travel, making th e suspension's resistance to com pression progr essively stro nge r. T he gas -charged rear shock h as a , remote reservo ir a nd ex terna lly-adj us table rebound a nd com p ressio n dampi n g. T here's also a bu ilt-in system to adj ust dam ping or ifices to compensa te for cha nges in shock flu id viscos ity as th e flu id heat s u p , usin g a thermos ta t cartridge / needle assem bly. T h e fro m for ks have elec trica lly tr igger ed a nt i-di ve (co mpress io n dampin g increases whe n th e front brake lig ht swi tch. built into th e front brak e ma ster cylinder asse m bly. is acti vate d) . T he forks a lso use th e Suzuki P DF (Pos itive Da mp in g Forks) system , wh ich increa ses co m p ressio n dampin g whe n o il p ressure in th e forks (indica tin g rapid co m p ressio n) n ses. There's a steering dam per mounted . on th e front fork s, runn in g tra nsversely in front o f th e tubes and a nc hored to th e fram e steering h ead. T he fork s ca rry two 12.2-inch float in g stai n less-steel di scs wi th fo ur p is to n calipers. T he single rea r dis c measu res 8.7-inches a nd h as a du al p iston cali per; th e caliper stay rod is attached to a piv ot on th e fram e to red uce rea r wheel cha tter under brak in g . Six-spoke, cast a lum inum -alloy wh eels are use d fro m and rea r, a 2.75x I8 -inch fro m a nd a 4.0x I8- inch rear . Both wh eel s ca rry Dun lop or Bridgestone rad ia ls. a 110/ 80- 18 K701 Dun lop front an d a 150/ 70-18 K700 Dun lop rear or a 110/80-18 CY03 Bridgeston e fro nt and a 150170-18 C Y04 Bridgestone rea r. T he wh eel s run ' on h oll ow, chrome -moly-steel ax les. T he swi ngarm pivot shaft is a lso holl o w chrome- moly steel. Footpegs a nd the rea r brak e a nd sh ift levers a re forged a lu m in u m, as ar e th e cli p-on handl ebar s. Bod ywork incl udes a full fa irin g wi th dual 60/55w ha logen h ea dl ights and a tailsection a nd individua l sidepa n els, a ll made of pl a st ic. T he re's a n optiona l solo-sea t-with-backpa d cover for th e rear of th e sta ndard dua l sea t. Rearview m irr ors are strea m lined a nd bolt to the fai ri ng. Instru m ents incl ude a centra lly -loca ted tachome ter a n d a n o ffset speedo meter, a nd indio ca tor ligh ts fo r turn sig nals. h ig h bea m . side sta nd deploy me nt, a nd oi l p ressure. T h e s ta n da rd ver si on o f th e GSX R 1100 ha s a 5.5-ga llon steel gas tank wi th an a ircraft-s tyle filler ca p ; th e Ca liforn ia version loses 0.5-ga llo n o f ca pa city to that state's req uired evaporative emiss ions recovery system. GSX R l lOOs shou ld be avai la ble a t Suz u ki dealers by la te.Decem ber. • . . . . '. . 13

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