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/127123
AT REST Fork movement is regulated by the amount of fork oil metered through the factory engineered orifices in the damping system. These orifices are specifically "U"r-I",_ sized based on weight, geometry and anticipated . usageof each motorcycle. Fork oil selection iscriticaltoinsure instant and predictable damping ~;a~ 6 response regardless of speed, , :II temperature or ground '''1~t....''1 surface. Consistent viscosity in all weight ranges, seal conditioning, anti-wear additives and antifoaming agents are prime factors in choosing the proper COMPRESSION fork oil. Compression damping forces are designed to balance forkcompressionspeed with the obstacle it encounters. Small obstacle: Oil moves in and out of orifices quickly, without resistance,providinga . smooth uninterrupted'teetlnq. Large obstacle: As the fork continues to compress, oil is quickly , forced through the orifices, rapidly 'T:\'~F7~ "... building hydraulic resistance to Jr slowthe fork and minimize bottoming. Consistent fork oil viscosity is the key ingredient that can smoothly absorb the slightest impact or rapidly increase resistance for the unseen REBOUND obstacle. Fork oil viscosity directly affects the return of speed of your fork after compression. The objective of rebound damping Is to maintain tirecontact with the ground, insuring traction and steering control: Although the factory has engineered a pre-determined return speed, variables such as rider's weight, terrain and temperature make custom tuning a necessity. Only PJ1fork tuning oil is formulated to maintain a consistent viscosity. It makes fine tuning a simple process. am 01 mU·deal recomme PJ1 ForM Oil" M ike Burlingham. Pre side nt of Cycle Co nse rvat ion Club of ~I ichigan Years Rid ing: 17 Cu rr ent Mot o rcycles: Honda XR3S0 BM\X' WORT Only PJl makes a consistent "Optim um off-road handling uiscosity fork tuning oil. Try it. The requires maintaining tire contact with difference will amaze you. Available at the constantly changing terrain. You better dealers everywhere. don't want any surprises from your To o rder, send 52.75 plus 51.50 suspension sys tem , Riding in Michigan, postage and handling to PJl Co rporation where th e dai ly temperatures can vary 30 ' or more, my bike's handling World Headquarters changed wi th the temperature. Stiff in 8 340 E. Raintree Drive Scottsdale, AZ the mo rni ng, spo ngy in the afternoon. USA, 8 ; 26 0. "My dealer told me the p roblem was my fork oil and recommended PJI. . -.. He explained that unlike other fo rk oils, PJl is enhanced with special pour depressants to maintai n a consistent. viscosity, through a wide range of temperatures, The first time I used PJl fork tun ing o il, I co uld feel the differenc e. For more tha n five years now, no matter what the temperatur e or te rrain, my rid e is totally predictable."