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/126931
~ ..1 • • The YSR50 is brand new for 1987. The 49cc sport bike features seven-port torque induction and the Yamaha Energy Induction System (Y.E.I.S.). The FZR1000R features a highly oversquare bore and stroke of 75.0x 66.Omm and Yamaha claims a 130 horsepower output at 10.000 rpm. The XT350 returns to highlight the dual-purpose line along with the larger displacement XT600; singles made for on/off road use. Yamaha's newest cruiser is the XV535, an air-cooled twin that produces a claimed 45 horsepower; the gas tank is located below the seat. ter pistons, rings, and connecting rods than on last year's FZ750. Yamaha claims the FZRl ooOR produces 130 hp at 10,000 rpm and 74.5 foot pounds torque at 8500 rpm and has a five speed transmission. The clutch has been beefed up from the eight clutch plates used on the FZ750 to nine in order to withstand the increased power. The 989cc powerplant sits in an aluminum delta box design frame that contributes to the bikes claimed weight of less than 450 pounds. Also contributing to the bike's low weight are the alloy wheels which are cast with hollow spokes. The big spoT! bike uses dual 320mm disc brakes on the front that feature a floating design and are clamped by four-piston calipers. The front suspension is an air-adjustable version of Yamaha's Monocross rising-rate suspension with a gas-charged shock. On the other end of the spectrum is the YSR50. The 49.3cc bike is a scaled down sport bike with a sophisticated chassis and a full, racer-styled fairing. The bike has all the necessary lighting and is fully licensable. The bike is powered by a 49.3cc reed-valve two-stroke single that features a seven-port.l.c;>~.us,!n.dl!ctio~ and the Yamaha ~ergy n~d'"uctlon System (Y.E.I.S). The YSR50 has a five-speed, close-ratio gearbox and has a claimed top speed of 38 mph. The powerplant in the YSR50 sits in a diamond frame built from boxsection steel tubing. The rear suspension is a rising rate Monocross with a single shock. Up front the bike uses telescopic forks; other details include rearset-style footpegs with clip-on handlebars and an aircraft-type fuel tank cap. Another new sport bike for America is the entry-level SRX250. Yamaha claims the 249cc single produces 22 horsepower while weighing in at 271 pounds. The bike features a 16-inch front wheel and an upper and lower sport fairing. The SRX250 has a disc front brake and a rear drum; the bike comes in red and while color scheme. Also new from Yamaha for 1987 is the Virago XV535 cruiser. The XV535 is powered by a 535cc, air-COOled, single overhead cam engine that Yamaha claims produces 45 horsepower. Styling features on the XV535 indude a long, full-size wheelbase, a laid-back seat, chrome-plated spoked wheels, a fat rear tire and an overand-under exhaust system that exits from the right-hand side of the bike. The fuel tank on the cruiser sits below the seat while a false tank sits above the engine; the seat height is 28 inches. The FZ750 returns in 1987 as the FZR750R and features the option of a full race kit that is available for competition use. The five-valve-per-cylinder, 749cc powerplant sits in an alum- • The FZR1000R features an all·new four-into-one exhaust system designed to reduce weight while giving the bike a "competition appearance." inurn Delta Box frame; Yamaha will produce only 200 of .the ready-forAMA/Superbike-racing FZR750Rs. One of the improvements on the FZ750R is the intake air cooling system that reduces the temperature of the intake air by approximately 10-15 degrees; Yamaha claims the increased density of air/fuel charge results in significant power gains with no loss in other areas of engine performance. Completing the FZR750R is rhe new FZ700. The bike, which is based on the 1986 FZ750, is powered by a five-valve Genesis engine that features a bore and stroke of 68.0 x 48.0 mm for a displacement of 687cc. A new feature is the fully-electronic, digitally controlled spark advance with the Transistor Controlled Ignition (T.e. I.). The poweTplant sits in a double cradle, high-tensile box-section steel tubing fTame; the bike has a claimed wet weight of 505 pounds. Returning to Yamaha's street bike lineup is the FJ1200, the Venture Royale,~eXV II 00 Virago, the XV700 Virago, the FZX700 Fazer, and the YX600 Radian. Leading the way on the dual-purpose bike front for Yamaha is the XT600 and XT350. • 9