Approaching the front straight out of Thunderhill raceway's super-slick turn nine, the rev counter needle pulled from nowhere up into the power zone. As the pointer flicked through 6,000, then 7,000, then 8, the bellow grew to a roar, the scenery rushed forward in warp drive, and then with a quick flick of its pointy tail, the tach hit 10-and-a-half grand and the power was gone.
With a thoughtfully deliberate nudge (because the transmission selects gears exactly opposite the normal way) the gear lever clicked into third, and the needle flicked quickly up from 8,000 rpm again. Another nudge into fourth, then fifth, and turn one arrived, hard. Time for a two-fingered squeeze on the oh-so-strong brakes, and time to lean to the left, hard.
This is definitely not your average Harley-Davidson, or even one that shares any parts with the usual Milwaukee America
Made in America
The streetable VR1000 you see here (and the race version) are both owned by Mike Canepa, manager of the San Jose Harley-Davidson race team. Over the latter part of the 1995 season, Mike has spent hours in his shop, and in the shops of many other Northern California metalwork magicians, fettling the VR to its peak performance. Their work all seemed worthwhile when rider Michael Barnes qualified faster than the factory riders, Doug Chandler and Chris Carr, at the Phoenix AMA national at season's end. Canepa owns the street VR as a rolling parts cache for the race bike, but offered Motorcycle Online a chance to ride the rare machine. We jumped at it.
The VR is an unabashed racer, hiding behind its faired-in single headlamp, elephant-ears mirrors and unlikely turn signals. But it's a racer without a pedigree. Unlike the Japanese and Italian competition, the VR doesn't have decades of race experience behind it. A glance from the left side of the VR1000 will give a clue to why Harley did things this way -- the engine looks like one fourth of a V-8 car engine, and the car world has many collective years of making rapid motors. How difficult could it be to make a fast V-twin and stuff it into a well-handling chassis? The answer is, very.
Two seasons later, the America First policy has changed. The sturdy, strong-as-the-Golden-Gate-Bridge frame with its direct connection between steering head and adjustable swinging arm remains, but many other components have been changed, and it's likely that more will change before the VR shows up for the first race of the '96 season.
Ohlins front fork tubes now grace the front end, and wheels are now lighter-than-the-originals Marchesini items. Two years of racetrack development have obviously brought refinement, but the search for more power has continued.
The 60 degree V-twin (previous Harleys have all shared a narrower, 45 degree angle between the cylinders) is less tall than a narrower angle v-twin would be, yet doesn't present the design difficulties that a long, 90 degree V-twin (like all the current two-cylinder Ducatis) would to a frame designer. The engine is compact, and fits well between the twin spars of the massive box-section aluminum frame. Popular mythology around the race track attributes that strong frame with unshakable handling, but the experience of various riders has been different, according to trackside sources.
Over the last two seasons, the VR's obvious power disadvantage has kept it off the podium, but the factory team has also struggled with handling problems. Factory rider Doug Chandler complains of understeer on corner exits, of too much weight up high.
Perhaps the frame design will change, (Over? Spondon? Harris?) but this year time was spent chasing other, more immediate problems. The original factory triple clamps presented a very narrow bearing area to the frame, and one of the factory improvements this year has been to change the clamps, and the bearings, to offer more support. Both San Jose Harley VRs are fitted with Fast By Ferracci magnesium triple clamps. The bigger clamp pinches the Ohlins tubes less, one theory being that misalignment of the tubes was upsetting handling. But the non-adjustable clamps also have a more solid bearing surface than the Harley originals, and according to Canepa, riders who have ridden the bike since the change have all noticed the difference.
First impressions are of heft, due to the large gas tank right in front of the rider's perch, and of the massive size of all components. The magnesium triple clamps are huge, and a giant economy size piece of carbon fiber covers the fairing mounted battery and regulator.
It would have been nice to sample an absolutely stock VR, but as I rode the VR1000 around Northern California's Thunderhill track, it felt good just to be riding one at all. To be legal for AMA Superbike races, the VR must be street legal. Not in the US VR street America Warsaw Poland US
First impressions are of heft, due to the large gas tank right in front of the rider's perch, and of the massive size of all components. The magnesium triple clamps are huge, and a giant economy size piece of carbon fiber covers the fairing mounted battery and regulator.
My first laps around Thunderhill are timid, slow affairs, as I get used to the bike; the feel of its brakes, the quirks of handling. The steering damper imparts a vague feel to the steering, so I back it off to almost nothing. The Ohlins forks are supple, blanking out all tiny bumps in this smooth track. The rear suspension felt stiff, overdamped when I first bounced on the seat, but it handles the real-world cornering loads with aplomb, soaking up the bumps. It's only when I open the throttle, hard, over the curb at the apex of turn nine that the front wheel rears, shakes its head, then settles back. It doesn't misbehave, but the bike doesn't inspire instant confidence. This machine must be muscled into turns, but once it does comply, the combination of 17 inch front wheel and ultra-quick steering head angle flick almost too quickly. The brakes, though, are a delight. The six-piston calipers bite progressively, hard as you want, and bring the machine down to slow speed, quick. After a dozen laps, I'm beginning to get a handle on the bike's manners, and able to heel it into turns easily, but the $50,000 price tag is hard to forget.
Now it's time for the VR racer, and the difference between the two is amazing. Fifty pounds lighter, thanks to the lack of battery, lights, and electric starter, the racer pulls better from low rpm, handles more predictably (helped by brand new racing slicks and a quarter inch wider front wheel), and I'm instantly circulating faster. The gearing is just right for the track, and in the hands of a real racer, the bike would easily pull up to the 10,800 rpm redline at the end of the straight. In my hands, the tach needle climbs to oh-so-nearly to brush the ten thou' marker.
I'm impressed with how near to the mark the Harley is -- and how far the VR has got to go. If it can't scare me, it needs more power, less weight. Canepa and the San Jose team have made steps towards more power -- most noticeably with head work performed by Santa Rosa , CA based Engine Dynamics -- but there's sure to be a lot of head-scratching in Milwaukee
0 التعليقات:
Post a Comment