Cycle News - Archive Issues - 1990's

HOllie, HOllie On the Range •••and the PodiulII. average speed, what is the estimated average speed for a NSR250? By using the de rived acceleration, b raking and co rnering factor , the esti m a ted ave rage speed fo r the 'SR250 is: 96(0.23(0.63/ 1.35)+0.17(1.238)+0.6 0(1.113))=94.7 mph (no t bad!) For the NSR500V, the result is: 96(0.23(0.93/1.35)+0.17(1.179)+0.6 0(1.086»=97.0 mph Ob vious tv , tra cks wi t h fe w s traighta ways are going to heavily favor the NSR500V, w hic h is someth ing everyone knew already. At th is p oint, critical readers are p robably read y to write in to the edi tor, claiming omissions an d ove rsimplific ation s within this ana lysis, an d offering leng thy explanations of how things are in th e real world. Such co m m ents are probably valid. But probably the biggest erro r in this analvsis is in the area of tir es, an d here th e NSR 500V h as a clea r adva n tage o v e r th e NSR 500 - the lower weight and lower power of the 500V will p lace a lower de ma nd on its tires. Ti res come in a vari et y of compounds, but are available onl y in dis cre te steps. Th is is what makes tire selection so difficult: Should one ru n the hard tire that will last the entir e race, or are conditions su ch th at one can take the next step up, and run a so fter tire? Clearl y, a 500V rider will alwavs be closer to the choice of the softer tires. The NSR500V' s sl ower-rev ving engine shou ld also be more friendly t o t h e tire s, as th e p ower pul se s should be more widely spaced th an on the NSR500 . Ho nda has n e ver ' pu blicly stated how close the firing is on th e NS R500, but it is probably around 70 degree s of cr ank an gle rotation. Under th is assumption, at 12,500 rpm, the seco nd pair of cylin ders fires 0.93 milli seconds after the first pair, and then ther e is a pause of 3.87 m illisecond s un til the first pair fires again. The NSR500V is a 100-d egree Vtwin, wi th an u n d iscl o se d firing in terva l. Assuming th at the interval is 100 d egrees , a n d th a t the p e ak po we r p oint in th e r pm r ange is 8900 (12.500 d ivided by root tw o ), then th e secon d cvlinder fires 1.87 millisecon d s afte r the firs t, followed by a 4.87 millisecond d we ll until the first cylinde r fires again. Both pu lses a re farther apart in tim e, w hic h should h elp the NSR500V rider ride at the traction limit o f the rear tire. The NSR500V might also be a better pl atform from wh ich to develop moto rcycle te chn o lo g y, as the NSR500 V-four has becom e overlv complex w ith vario us electro nic subsystems to control the engin e's explosive power. The slower-revving, lesscom plicated 500 V-twin ought to be easier to adapt to fuel injection than the high-revvin g V-four. If Hon d a is serious abo u t selli ng the NSRSOOV in 1997, they will need to prove its com petitiveness in 1996. Th e tr ack tha t loo ks most suited to th e NSR 500V is Shah Alam, wher e the d ifference between the 500cc and 250cc lap spee ds is a scant 0.94 mph the sma lles t of any of the Gran d Prix circuits. Interestin gly, it is th e opening race for 1996... Funny, isn 't it, that the an swer to the modem, high-tech, V-four Grand Pri x bikes ma y be in th e form o f a simple, basic V-tw in ? Pro Circuit riders fel t right at home at the GNC Motocross Finals in Lake Whit1lt'.); Texas because they 're used to the territory. Once again, the podium waSfi lled with Pro Circuit sponso red riders, covering the full range of classes. I G lst 2nd 250 Expert 125 Expert lst 4th 1st 3rd I st 2nd 3rd 1st 2nd 41h 1SI 2nd 41h 51h 2nd 3rd l st 2nd 3rd 250 Int. Mod. 250 Int. Stock 125 Int. Mod. 125 Int. Stock 125 Nov. Stock 125 Beg, 125 Schoolboy 125 Open tst Women 250 Open 30+ Nov. Mini 12-13 Stk, Mini 12-13 Mod. Mini 14-16 Stk, Mini 14- 16 Mod. Mini Open \OO cc 2nd 41h lsI 4th 2nd 4th 4th 5th 3rd 1st 2nd 1st 2nd 5th 3rd Ist C Motocross Finals Casey Johnson Casey Lytle Casey Johnso n Casey Lytle Ricky Ca r micha el Doug Pa rso ns Ricky Ca rmicha el J ason T homas J ason Dempsey Ricky Ca r michael Danny Smith Jiri Dostal Ricky Carmichael Danny Smith Ernie Fonseca Jason Thomas Roger Thayer Kevin Rix Danny Smith Brett Racin e Ernie Fonseca Jiri Dostal Ernie Fonseca Doug Parsons Kristy Shealy Laura Burger Doug Parsons Paul Burger Beau Boynton Ivan Tedesco Ivan Tedesco Travis Elliot Matt Walker Matt Walker Travis Elliot Jeff Boone Ivan Tedesco Travis Elliot Pipe, Silencer, Motor, Suspension Pipe, Silen cer, Motor, Suspension Pipe, Silen cer, Motor, Susp ension Pipe, Silencer, Motor, Susp ension Pipe, Silencer, Motor, Susp ension Pipe, Silencer, Motor, Suspension Susp ension Suspension Suspension Pipe, Silencer, Motor, Susp ension Pipe. Silencer, Motor, Susp ension . Pipe, Silencer, Motor, Susp ension Suspension Suspensio n Suspension Suspension Suspension Pipe, Silencer, Motor, Susp ension Pipe, Silencer, Motor, Suspension Pipe, Silen cer, Motor, Susp ension Pipe, Silencer, Motor, Susp ension Pipe. Silencer, Motor, Suspension Pipe, Silencer, Mo tor, Susp ension Pipe, Silencer, Motor, Suspen sion Pipe. Silencer, Motor, Suspension Pipe. Silencer, Motor, Suspension Pipe, Silencer, Motor, Suspension Pipe, Silencer, Motor, Suspension Suspension Suspension Pipe, Silencer, Motor, Suspension Suspension Suspension Pipe, Silencer, Motor, Suspension Pipe. Silence r, Motor, Suspension Pipe. Silencer, Motor, Suspension Pipe: Sile nce r, Motor, Suspension Pipe. Silencer, Motor, Suspension Pro Circuit is at amateur races to assist and suppo rt all riders he/ping them race safe and achieve their goals. Come up and say 'Howdy' the next time you see us. ~ PRO CIRCUIT We Roce E verywhere. 4214 E. La Palma,Anaheim, California 92807 fax 7141993-0344 7 14/993-5400 AYfONA Smokin' Joe's Racing (520ERV2 equipped) 0 .1.0 VM Series X-Ring chain is des igned for today's high performance motorcycles. The patented X-Ring construction creates a chain that is low in friction and high in wear resistance. O.l.O's 520ERV2, 525HV, and 530ZV2 also have X-Rings. The 520ERV2 (Exclusive Racing Chain) is used by top fa ctory road race teams .50% Less Friction than stan dard a-Ring chain worldwide. For the very best in performance and durability ask ·50 to 100% Longer Wear Resistance than your dea ler for 0. 1. 0 VM standard D-Ring chain. Series Premium X-Ring Chain. htentHXTn- --a· . . .- 81 ~ ~ ~ ~2o-R-' ............ """"""" -SpKiIIDLD V Smok ln ' Joe 's Racing / M iguel DuHam e l , 1st Place AMA National Superbike and 600cc SuperSport Races at Daytona ...... l-< 0.. -c 35

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