Cycle News - Archive Issues - 1970's

Cycle News 1978 11 29

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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0') C"I .1-0 V ..c v e > o Z As you eIIn see with the blw photos, the DR370 has a yellow paint job. Handling is fairly agile, steady and predictable below 40 mph. By Tod Rafferty . Photos by Phred Potts When the Suzuki DR and SP370 four-stroke singles appeared a year ago, they were met with a generally lukewarm reception by the motorcycle press. The complaints were lack of power, IAbove) The airbox. toolbox and exhaust plumbing share space beneath the aeat.IBelow) The airbox looks well sealed against the elements. 8 especially the shortage of torque in the low-rev range ; a snatchy drivelin e ilia t p rod u ced an a~oy. . mg lurch m the power deli very and a suspension system barely adequate for the demands of fast trail rid ing. . On the other side of the ledger , th e machines were relatively light (28 1 pounds for the street legal SP , and 271 for its knobby-tired counterpart the DR ). They handled reasonably well, far more agile than the Yamaha 500 , for example. And their mechanical, simplicity made them easy to maintain. Plus they looked real spiffy, with a tank/seat/fender line reminiscent of the now sem i-legendary Ossa Stiletto. , Unfortunately, the 1979 models have arrived without any correction of the aforementioned deficiencies . What we have is a medium -displacement bike that could be made a lot better with a little fiddling and another few hundred bucks. The DR gets a new yellow paint job this' year, and the headlight has changed from round to squarish. The ~riveline lurch seems l~ ~ro~ounced the ne~er .m <.>del , but It IS sull the~e and remains rrrttant enough to make It our mos t important criticism of th e machine. You can live with it , bu t you shouldn't hav e to . The SP and DR Suzukis share the same 369cc engine, with bore and stroke dimensions of 85 X 65.2mm that put it decidedly oversquare. It likes to spin. The compression ratio is 8.9 :I , and the combustion chamber is fed by a 32mm Mikuni . The interplay be tween this carburetor and the camshaft/compression arrangement is not quite right in the low-rpm range. Snap the throttle open with the revs down , and the engine coughs and dies . With the engine turning over 3000 rpm , the throttle response is predictably smooth and progressive. The powerplant is of straightforward design . There is no counterbalancing system riding on the crank shaft, but engine vibration is not especially annoying. The wet sump oiling system , with a capacity of 1.7 quarts, lubricates both ends of die engine and the transmission and all the oil passages are internal. A small In

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