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/125858
NOVIITHE(AIBUIETOI IA I-NJelial".fonilulated N (lI: .!~ 1 1 1111111 &11111 IOrcy{lesl Two book • reviews Bike owners-get what car drivers have enjoyed for years: easier starts, smoother-running e'ngines, better mileage and cleaner exhaust! Do it with GUMOUT, now specially formulated for bikes-ideal for 2 or 4 cycle engines. GUMOUT Carb Cleaner added to the gas tank absorbs moistureand dissolves gum deposits as you ride. Jet Spray GUMOUT zaps off carburetor gum and exhaust grime.. .also cleans chains right down to the metal in seconds. Your bike needs theseother performance aids as well: GUMOUT CHAIN LUBE penetrates fast to all points. Protects, lubricates. GUMOUT DEGREASER quickly cuts through heavy layers of oil, grease and road dirt, washes clean with spray of water. Get all GUMOUT products wherever quality motorcycle suppliesare sold. The Boonie Book by Carl Shipman , H.P. Books, Tucson, Arizona; $5.00. 8% by 11 format, paper . 190 pp. , 1974. Carl Shipman's latest book, which is actually a second and drastically revised, or enlarged version of a 42-pagc book by the same title MEn·THE(lUNERS'FROM . ~_~~~ Cleveland Ohio 44104 SCUDERIA HUSQVARNA PENTON LAVERDA SALES. SERVICE ', AND MAIL SPECIALISTS Maico Aluminum SWing Arms w ith moved up shock po sit ion Mad e o f strong a ircraft allov approx % t he we ight of st oc k swi ng ar m no castings used . All pa rts mach ined . Uses st ock Maico bush ings a nd spacer. (213) 542-1695 The Finest Selecti on of Part s and Accessories For Bike and Rider We Offer Expert Repairs Porting and Competition T uning R eceive $5 0 Worth of Parts and A ccessories FREE When Yo u Bu y a New Hu sk y or Pen t on. .. only $99.00 Alloy spacer available for $3 .00 ea. Other models available soon. Dealer Inquiry invited . Calif . residents add 6% sales tax . • KM Enterprises 2419 Artesia Blvd . Redondo Beach , Californ ia 90278 ~~~~f,~\)\)~ ~ ..."".\.'0 ~ Learn how to '\\\'" tune bikes from the BURAK TUNIN G SCHOOL for a profitabl e career or hobby. • BURAK BYE-PRODUCTS P.O. Box 1348 . Cupertino. CA 95014 408-732·2752 SPECIAL OFFER' JIM DAVIS MOTOCROSS EQUIPMENT ~ .95 CE NTU RION M OUTH ;:;U.... RD...... SHOULDER PADS .. .... SHI N AND KNEE ::> UARD. ... .. 16JiO 19.25 DELUXE CHES T PRO TE CTOR ... . 16. 25 CH I LD REN 'S SHOULD ER PA DS ... CH ILDREN 'S MOU TH 5 U A RO... .. CH I LD R EN 'S SHIN AN D KNEE . . . . 11, 95 4 .85 12. 85 YOUTH EI...BOW ;:;UARDS .... 7, 95 15170 Ra ymer S t. • Van Nuys. CA (213) 780-1 768 What's happening? 14 B ILL. JONE:S MO T OS F'ORT BOX 242 NOR T H HO L LVWOOD C AL IF . 9 160 3 CALllDAB1 published in 1971 , is very di fficul t to evaluate. It is intended t o provide beginning trail riders (one suspects Shipman had in mind an average reader o f about 14 .years.old) with all the basic kn owled ge t ha t the y need for trail riding plus a little ex tra . T he book co ve rs so m e el ementary d esign th eory of m otor cy cles, q uite a bit o f th e m ech an ical k no wle dge necessary to ca re fo r the bi ke, a large ch u n k of riding instruction , m o re me chani cs, so rr e em erge ncy p roc edures, and a fin al cha p ter en titled " T he Ban g-Ban g Servo Te c hnique ." The reason th is is a difficult b oo k t o analy ze is b ecause you are fa ced w ith tw o conflicting an d irr econcilable fac ts : F irs t, t he book is beau ti ful in appearance w ith p hotos o n th e back an d fron t cover th at really evo ke th e spirit of tra il ridi n g. an d ins ide th ere is suffi ci ent m a teri al to m ak e any inex p e rienc ed and m any experie n ced rid ers m uch be tter eq ui p ped fo r t he ir spo rt. On the o ther hand, th ere are so m an y irritating. slo ppy. in a cc urate, and j us t p lain missin g ite ms th at m an y read ers w ho b u y th e book mi gh t n o t find th e pat ien ce and tolerance to read it , a nd so me of those who d o mi ght feel che ate d. Shipman begin s th e bo o k, naturally en o ugh , with a preface whi ch he be gin s with the senten ce , '"I never write prefaces ." At t he end of the preface he concludes, "You may possibl y suspect that y ou have just read a preface." Cheap ego shots lik e this a t the expense o f t he re ad er ca n hardly make th e read er predispo sed to lik e th e a u t ho r. Ne xt , yo u a re visu all y assa ulted by the type sty le. In a book th a t sells for $5 , yo u mi ght e xpect th e typ e to be set with j us t ified rig h t -han d margins, but this book comes t ype writ e r style , which is o ka y. I su pp ose as an economy me asure, but wh y in th e wo rld have ra n do m , un e v en pa r a gr aph indentations ? It's m os t disco ncerting, and serves n o purpo se th a t I can see. In th e firs t chap te r, on rake and trail, the au thor d escribes these co nc e p t s in fai rly pic turesque te rms so tha t the read er should co me away with a feeling for wh at th ey m ean. Bu t he has tw o illu strations of o d dball co m bi nati ons of rak e a nd trail, an d none of the normal configuration. Ther e is no d iagram s ho wing how rak e and trail are measured . not e ven a senten ce . telling wh at un it s (degres s and inc hes) ar e n orm ally used to des cribe these quantities. And o f co u rse -th ere is no m enti on of wh at nom imal rake and trail values for different bikes might be. This is o ne of th e very fir st questions th at plagues the beginning dirt rider because he hears more exp ert riders talking a bo u t ra ke and trail and he wonders if his ar e " abo u t right." Th is book won't help him in th at respect. In the chap te r o n suspe ns io n, th ere is th e sa me sort o f pr obl em. Practical informati on , like a sim ple formula for calc ula ting th e sp rin g rat e need ed for a give n bike and rid er wei gh t, is missing. T here is no ex p lana tio n o f how manufactured dam pe rs are rat ed, nor any thing on how to se lec t a damper for