Below the surface, changes are subtle. Alterations to the antediluvian, 651cc torque pump aim at maintaining horsepower output despite emissions rules that put a catalyst in this year's exhaust system. New intake porting leads to a more efficient combustion chamber with a twinge more compression. The net result is a bit more power than our '07 testbike all the way from just above idle to 6200 rpm, where it peaks with 37 bhp. The '07 needs another 400 rpm to make 37.2 ponies. The new engine manages more torque with less rpm: 33.4 lb.-ft. at 4950 rpm vs. 32.2 at 5850. So far, so good, but there's a catch...
All those new parts add up. At 432 pounds with a full tank of gas, the '08 KLR is 22 pounds heavier than its predecessor. And considering its modest output, acceleration is something less than mind-bending. Our testbike blew through the Los Angeles County Raceway timing lights in 14.81 seconds at 85.97 mph vs. 14.73 at 85.31 for our '07. The old campaigner is a half-second quicker from 0-60 mph and feels a little lighter around town, but that edge evaporates at the end of the quarter-mile. Assuming you're in no spectacular hurry, those new parts also add up to a much better motorcycle.
Still choking on the power thing, Billy? Step into the big-single mindset. It's all about rheostatic torque here. Our '08 KLR made 95 percent of its peak at 2900 rpm. Wind it to redline if you must, but there's enough thrust between 2000 and 6000 to stay well ahead of most four-wheelers and make the first-rate five-speed gearbox mostly redundant. Steering isn't especially quick, but lowering the center of mass an inch or so takes away some of the top-heavy feel that comes with having 30-something pounds of unleaded between your knees. Having twice the travel of the average streetbike takes some getting used to too, but the ride is excellent: compliant, well damped and there's a whole lot less chassis pitch on the brakes. Whoa-power won't impress those accustomed to dual discs and four-pot calipers, and they need a healthy two-finger squeeze, but these brakes are to what came before as Fernando Alonso's are to Fred Flintstone's. Just remember to ease up when the front tire begins to howl.
Theoretically, the KLR has always been capable of going 290 miles or so on its 6.1 gallons of unleaded, but this one is comfortable enough to actually go that distance on purpose. With a little help from '08-spec bar-end weights, the counterbalanced single is smoother than it's ever been. A bit of buzz sneaks into the tank and pegs when the speedometer needle strikes 80 mph in fifth-that's 5200 rpm on the tach and 72 mph according to our radar gun. A clock and fuel gauge would be nice. Otherwise, the new instruments are a huge plus. With a little help from bigger handguards, wind protection is genuinely first-rate.
Though it can't match the twin-cylinder Suzuki V-Strom's pace on the straights, maintain your momentum and the KLR covers that diabolical confusion of potholes, kinks, coils and blind switchbacks a whole lot quicker than 37 horses should be able to thanks to sure-footed suspension and a long, stable chassis. Dunlop K750 all-surface tires were more impressive in '87 than '07. Still, they hang onto the pavement well enough to wear off a set of footpeg feelers as long as you can abide a little slide now and again.
They're genuinely horrifying for anything but relaxed skidding around in the dirt, which is no great hardship considering "432-pound dirtbike" is the same potentially painful oxymoron it was 20 years ago. Tattoo that on your frontal lobes and the KLR is a fine all-surface explorer. Stiffer springs and a new Uni-Trak link mean you use up less travel on the '08 despite the fact that there's less of it. Less ground clearance means going around logs and rocks the '07 goes over, and more bodywork means there's no such thing as a minor tip-over anymore, so don't.
For those of us who can't quite settle on one kind of riding or rationalize a garage full of motorcycles, the KLR650 proves one big cylinder is still a viable alternative to all- surface behemoths that can weigh 100 pounds more and cost three times as much. Someday, there will be a better way to lower the price of high adventure and still have a 50-mpg ride to work Monday morning. For now, it's the KLR.
Kawasaki klr650 price: $5349
Hard parts
Wheels
It's not the sort of change that shows up on specs sheets, but fattening up the old 3.5mm spokes to 4.0mm makes for a much more direct connection between handlebar and the surface du jour.
Engine
Revised combustion chamber design and slightly more compression give the catalyst inside the new one-piece exhaust less to do. New intake porting keeps combustibles moving quickly to boost bottom-end power. Thinner rings cut oil consumption.
Suspension
Stiffer spring and damping rates at both ends make the new bike much better behaved on the street than its ancestors. The only real shortfall in the dirt comes from diminished ground clearance, making it easier to prang the undercarriage.
BrakesThe biggest single improvement comes from brakes that actually stop the motorcycle without multiple downshifts and/or divine intervention. The new dual-piston front caliper makes most of the difference. We found the rear oversensitive, and what happened to the folding pedal?
Ergos
Losing a bit of suspension travel puts the latest KLR a bit closer to the ground. We found the new cockpit roomier and more comfortable all the way around, assuming your jeans show an inseam measurement near 32 inches. The package hasn't changed much. A higher bar sits a bit farther away, and there's a tick less legroom. All told, the '08 package is a sizeable improvement 90 percent of the time.
Tech Spec
Price: $5349
Engine type: l-c single
Valve train: DOHC, 4v
Displacement: 651cc
Bore x stroke: 100.0 x 83.0mm
Compression: 9.8:1
Fuel system: 40mm Keihin
Clutch: Wet, multi-plate
Transmission: 5-speed
Frame: Tubular-steel double-cradle
Front suspension: 41mm fork
Rear suspension: Single shock adjustable for pring preload and rebound damping
Front brake: Dual-piston caliper, 280mm disc
Rear brake: Single-piston caliper, 240mm disc
Front tire: 90/90-21 Dunlop K750
Rear tire: 130/80-17 Dunlop K750
Rake/trail: 28.0 /4.4 in.
Seat height: 35.0 in.
Wheelbase: 58.3 in.
Fuel capacity: 6.1 gal.
Weight (tank full/tank empty): 432/395 lbs.
Measured horsepower: 37.0 bhp @ 6200 rpm
Measured torque: 33.4 lb.-ft. @ 4950 rpm
Corrected 1/4-mile: 14.81 sec. @ 85.97 mph
Acceleration 0-60 mph: 6.27 sec.
Top-gear roll-on 60-80 mph: 7.3 sec.
Fuel mileage (high/low/avg.): 50/39/47 mpg
Colors: Candy Lime Green, Sunbeam Red, Blue
Available: Now
Warranty: 12 months, unlimited mi.
Contact: Kawasaki Motors Corp.
9950 Jeronimo Rd.
Irvine, CA 92718
949.770.0400
www.kawasaki.com
Dyno
Though underwhelming in terms of sheer peak output, the big banger makes almost as much muscle at 1200 rpm as it does at 6200. It gives up a bit of steam to the old KLR on top, but you won't care. Props to the engineers who managed to clean up tailpipe emissions on a carbureted engine without lousing up that linear flow in the process.
Killer KLR
What's mean, green and drinks kerosene? HDT-USA's 100-mpg military diesel apoleon would have told you an army runs on its stomach, but since British Mark 1 tanks ran over the Germans at Cambrai in 1917, fuel has become as vital as food. Making everything on the battlefield burn the same stuff streamlines the logistical nightmare of modern warfare, so NATO made it a goal in 1984. A U.S. Department of Defense edict declared diesel the primary fuel for air and ground forces in April 1999. As of 2005, the Navy locked in that single fuel concept by halting the transport of gasoline.
That's a predicament if, for instance, you're the United States Marine Corps Commandant looking at rows of gasoline-burning Kawasaki KLR650s. The search for a diesel-burning fleet led to a contract with Hayes Diversified Technologies (www.hdtusa.com) in Hesperia, California. Though primarily a military contractor, HDT had some experience on two wheels, having sold and raced Penton motorcycles under the Metco banner in the '70s. After delivering more than 2500 motorcycles to U.S. and allied forces, HDT was the logical source for a diesel-powered KLR.
Switching to so-called "heavy fuel" offers other advantages. Diesel is less flammable, simpler to refine and produces more energy per liter than gasoline. Plus a single designed to ingest kerosene-based combustibles should get twice as many miles per gallon of anything from NATO Military Spec Diesel Fuel to JP4 or even simple kerosene. But designing a stone-reliable engine that digests such diversity while spinning fast enough to meet military performance requirements is considerably more difficult than upping the compression and swapping the spark plug for a glow plug.
Working with Cranfield University in England, F1 Engineering in Hesperia and others, HDT developed a 611cc KLR derivative-fed by an ingenious indirect fuel-injection system that allows lower combustion pressures and a lighter engine-that makes a claimed 29.6 horsepower at 5700 rpm along with 33 lb.-ft. of torque at 4200 rpm. The M103M1 being built for the Marines weighs 369 pounds dry, complete with MilSpec upgrades. It gets from 0-60 mph in 9.7 seconds and can click along a bit beyond 90 mph. That gets it from A to B a bit behind a civilian KLR. But the diesel gets 96 miles from a gallon of aviation kerosene (a.k.a. JP8) or biodiesel at 55 mph. That means upward of 400 miles from the 4.2 gallons in its roto-molded, plastic fuel tank.
Though it's currently engaged with military production, HDT has civilian designs waiting in the wings. Looking much like a production KLR650, the D650A1 Bulldog uses essentially the same 611cc single as its warrior brothers, but takes 10.6 seconds to hit 60 mph from a stop and can cover 600 miles on one 6.1-gallon tank of petrol or biodiesel. With the price of gas these days, that may be the most popular specification of all.