Gilera RC600R

Gilera RC600
Manufacturer	Gilera
Also called	RC 600, RC600c, RC 600 c, RC600C (reduced effect), RC 600 C (reduced effect), RC600C, RC 600 C, RC600R, RC 600 R
Production	1992 -
Engine	Four stroke, single cylinder, DOHC, 4 valves
Compression ratio	10.5:1
Top Speed	164 km/h / 102 mph
Ignition	Electronic
Transmission	Final Drive: Chain
Suspension	Front: 41mm Morzocchi forks Rear: Boge shocks variable preload
Brakes	Front: Single 260mm disc Rear: Single 220mm disc
Front Tire	90/90 -21
Rear Tire	130/80 -17
Weight	145 kg / 320 lbs (dry),
Fuel Capacity	12 Liters / 3.17 US gal
Manuals	Service Manual

It could reach a top speed of 164 km/h / 102 mph.

Engine

The engine was a Liquid cooled cooled Four stroke, single cylinder, DOHC, 4 valves. The engine featured a 10.5:1 compression ratio.

Chassis

It came with a 90/90 -21 front tire and a 130/80 -17 rear tire. Stopping was achieved via Single 260mm disc in the front and a Single 220mm disc in the rear. The front suspension was a 41mm Morzocchi forks while the rear was equipped with a Boge shocks variable preload. The RC600R was fitted with a 12 Liters / 3.17 US gal fuel tank. The bike weighed just 145 kg / 320 lbs.

Photos

Overview

Gilera RC 600R

Gilera: back in the GPs next year and already back into road bikes in a big, single way. Roland Brown gets an early taste of the tempting RC600 WHEN THE EUROPEAN borders come down, one of the biggest plus points for the British biker is that machines currently available on the Continent but not here will suddenly come within reach. Among the tastiest of this year's forbidden fruit is the Gilera RC600, which never came even close to being imported by Heron — but which in 1993 could be yours for little more than its price in French francs and the cost of a ticket through the Chunnel. The RC600 is the latest version of the Milan firm's tough-as-teak single-cylinder trail bike. Gilera thumpers have been around on the Continent for several years, and this bike's predecessor won the Silhouette class for production based bikes in last year's Paris-Dakar Rally. Now the RC has been restyled — by no less an artist than Gilera's ex-Bimota design chief Fedcrico Martini — and refined to make a more rider-friendly roadster. The engine remains a 558cc liquid-cooled single, its four valves operated by twin camshafts turned by a toothed belt. Instead the flat plastic flanks of the new petrol-tank cover hide the area in which many changes have been made: the cylinder head. New cams and valves, as well as pistons, airbox and exhaust, combine to lift claimed power output from 48 to 53bhp at 7500rpm, which compares well with the efforts of Japanese rivals such as Honda's 46bhp Dominator and Suzuki's new 45bhp DR650RS. The frame is steel, with conventional forks at the front, Gilera's Power Drive rising-rate monoshock at the rear, and a single disc at each end. Steering geometry has been steepened slightly and the forks are now 43mm jobs from Kayaba, who supplied this year's Gilera factory desert-race bikes, in place of the 40mm Marzocchi used before. Like Ducati with the new 900SS, Gilera have abandoned Italian suspension parts for Japanese.

Rear shock is a Boge unit with its mounts strengthened (another Paris-Dakar tip) and linkages subtly repositioned. Seat height is reduced from 920mm to a much more reasonable 890mm but the RC is still tall and lean, and still sounds mean and rorty through the silencer exiting below the seat on the right. The nose-fairing gives protection only to the instruments — which now include a tacho in place of the old model's clock so wind pressure is taken by the rider's body as the Gilera accelerates away, stonking along very smartly provided you can keep the front wheel near the ground. At ultra-low revs the engine's a bit rough but smooths at 2500, and by 3500rpm there's enough grunt to lift the front wheel effortlessly. Come five thou the Gilera lengthens its stride, revving through the 7300rpm redline in the lower gears if you let it. A balancer-shaft keeps vibes to typical big-single levels at the six-grand, 75mph cruising speed that the bike felt capable of retaining all day (although the rider would benefit from some more protection). Flat-out, with my head behind the clocks, the RC hammered up to bang-on an indicated ton, with a little more to come given a long enough run-up.

Not that an RC600 pilot has to slow too much for the corners. Despite steepish geometry the RC never felt close to producing a wobble even in bumpy bends, and on the straight could be held flat-out with none of the weave with which many big trail bikes are cursed. Suspension at both ends was ace spite the long travel, with the non-just able Kayabas justifying Gilera's lack of patriotism. The forks red a little in response to a hard grab at the front disc, but generally we a refreshingly taut feel on tar-ac. The wide bars and quick steer-g meant the RC could be flicked around with even more ease than its 01b dry weight suggests. On rough, gravel-strewn country ads the RC was great fun, and ideal for nipping through the traffic. Even on the open road it was nippy, floating along with enough import to suggest that, although e wind-blast and the buzz through at and footrests would become moping after a time, you could appoippily keep riding until the disappointingly small 2.7-gallon gas tank ran dry. Ironically, the only time the Gilera was not at home was when I headed into a muddy field to give its off-road prowess a brief test. Here it was soon floundering because the Dunlop Trailmax tires, which had been fine on the road, filled their shallow tread with mud and failed to grip. Because of it, the bike's potential could only be hinted at, and you would have to fit a pair of enduro boots to do the RC justice off-road. But the Gilera's competitive pedigree and obvious quality suggest it should still do the business, and with its extra comfort and poise the RC600 has taken a step towards becoming as handy on the street as it is in the desert. In Italy it costs about £3850, a couple of hundred quid more than the Dominator but £2500 less than Cagiva's 900 Elefant. Never mind buying one in France. Throw in the cost of a one-way flight to Milan plus a few-dozen tankfuls of petrol, and post-'92 you could have a high old time bringing a new RC600 back across the Alps for not much more than four grand all-in. Perhaps this united Europe lark isn't such a bad thing after all. C Source  BIKE of 1992

Make Model	Gilera RC 600R
Year	1992 -
Engine Type	Four stroke, single cylinder, DOHC, 4 valves
Displacement	558 cc / 34.0 cu-in
Bore X Stroke	98 x 74 mm
Cooling System	Liquid cooled
Compression	10.5:1
Induction	2x 30mm carburetor
Ignition	Electronic
Starting	Electric
Max Power	53 hp / 39.5 kW @ 7800 rpm
Max Torque	51 Nm / 37 lb-ft @ 5500 rpm
Transmission / Drive	5 Speed
Final Drive	Chain
Front Suspension	41mm Morzocchi forks
Front Wheel Travel	160 mm / 6.2 in
Rear Suspension	Boge shocks variable preload
Rear Wheel Travel	260 mm / 10.2 in
Front Brakes	Single 260mm disc
Rear Brakes	Single 220mm disc
Front Tire	90/90 -21
Rear Tire	130/80 -17
Dry Weight	145 kg / 320 lbs
Fuel Capacity	12 Liters / 3.17 US gal
Consumption Average	17.5 km/lit
Standing ¼ Mile	13.8 sec / 149.5 km/h
Top Speed	164 km/h / 102 mph
Road Test	Motosprint 1992