Cycle News - Archive Issues - 1980's

Cycle News 1983 03 09

Cycle News is a weekly magazine that covers all aspects of motorcycling including Supercross, Motocross and MotoGP as well as new motorcycles

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Page 39 of 39

PBI Sprockets:" Precision Made for Powerful Performance! Performance begins on a CNC Lathe which machines the sprocket blank and hub to . precise tolerances of ± .0005 ". The hub ' is an integral part of the sprocket for exact alignment and up to 50% more contact area on the countershaft. M otorcycl e To u ring by Bill Stermer shou ld mak e a welcom e additio n to th e library of anyone wh o likes to hop on hi s o r her bike and p u t down so me mil es. T h e 144 page pa per back 'has sectio ns descr ib in g h ow to select your bi ke. troublesh ooting. how to ou tfit your bike for a lon g trip. plus tips on cloth ing a n d gea ri ng u p for nasty wea ther. Check yo ur deal er or books tore fo r a co p y. You can a lso order by m a il from HP Books. Dept. CN. P.O . Box 5367. T ucson. AZ85703. In clude $7.95 p lus $ 1 for pos tage a n d han dli ng for each copy. Computer memory controls the mach ine for each sprocket. Manufacturer's specifications for all sprockets are stored in the computer memory. Computer memory controls the lathe so the tolerances are the same for ' each sprocket, the first and the last. Perfect roundness of spline and sprocket blank assure precise fit on the mandrel for machining of tooth form and the spline teeth. With these exact tolerances, the sprockets ' transfer power evenly, smoothly and quietly. T he Nava GT h elm et features a pol ycarbo na te she ll a nd m eets DOT a nd SHCA a p p roval. It has m anuall y operated visor wh ich ca n be adjus ted by the ride r for the a mo u nt o f ventilation des ire d. T he h elmet comes in a ll p opular sizes. Colors ava ila ble are black. white. yellow. light blue. dark blue an d red. See your Na va dea ler for more info. a And PSI has a full line of sprockets, countershaft and rear. Standard and all optional sizes are available, 30 to 72 teeth , for selection of desired ratios matched for event, weather conditions, gas mileage or altitude. Choose from heat-treated, steel countershaft sprockets or 7075T651 aluminum rear , sprockets for tortuous conditions. ASK FOR THEM BY NAME. PSI Sprockets have been made for two decades by people who appreciate biking and build sprockets for performance. They know from experience the demands on equipment. They participate in road , motocross, and enduro events and take pride in translating their experience into the craft of making sprockets. They make them right and they make them tough. PSI Sprockets. Ask for them at your local ~ealer. • ~ '0 .,,;: . e K7.500 5SO FOURS ' /979"981 . l:J vK t :· Rf:"J>:AJR' PfJ

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