Honda XR600
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The Honda XR600R is a very popular offroad motorcycle with an air cooled single cylinder, four stroke engine. The bike was manufactured by Honda from 1985 to 2000, after which it was replaced by the liquid cooled XR650 model.
The engine displacement is 591 cc with four valves placed in a RFVC (Radial Four Valve Combustion) radial disposition with a single camshaft SOHC. It has a dry sump lubrication system. The engine has a compression of 9.0:1 with a bore/stroke of 97 × 80 mm. The engine is fed by a 39 mm piston-valve carburator. The front suspension is managed by two conventional 43 mm forks with compression and rebound adjustability, and in the rear are a Prolink single shock with preload, compression and rebound adjustability. The bike has a five speed transmission and a kickstarter.
[edit] General specifications for the Honda XR600R
| Engine Type | Single Cylinder, Air Cooled, Four-Stroke, SOHC, 4 valves |
|---|---|
| Carburetion | Keihin PD8-AF, Ø39 mm |
| Displacement | 591 cc |
| Bore × Stroke | 97.0 mm × 80.0 mm (3.82 in. × 3.15 in.) |
| Peak Power | 45 bhp (33.6 kW) @ 6,500 rpm (1985 through 1987 models) |
| Compression Ratio | 9.0 : 1 |
| Fuel Capacity | 10 L (2.64 gallons), plus 2 L (0.53 gal.) reserve |
| Oil Capacity | 2.3 L (2.43 US quarts) |
| Wheelbase | 1455 mm (57.3 in.) |
| Overall length | 2160 mm (85.0 in.) |
| Overall width | 900 mm (35.5 in.) |
| Overall height | 1215 mm (47.8 in.) |
| Seat Height | 955 mm (37.6 in.) |
| Ground clearance | 345 mm (13.6 in.) |
| Dry Weight | 123 kg (272 lbs) |
| Tires | Front: 21 in. 80/100; Rear: 18 in. 110/100 |
| Brakes | Front: 1 disc, dual-piston pin-slider caliper; Rear: 1 disc, single-piston pin-slider caliper. |
These motorcycles are designed mainly for open and desert racing where speeds are over 50-60 mph (80-100 kph). Nonetheless they were used in almost every offroad competition in the world, Enduro, hare scrambles, desert racing, rallies, and motocross (although it is a heavy bike for this discipline).
The bike was also favored for Sunday drivers, fun trips and legal on-road use where a little modifications mainly in the brakes and the wheels allows for a great on-road machine. The Honda XR motorcycles are considered very reliable, low manteinance, rugged and dependable machines. The lack of a water cooling system allows for a hotter running engine but in the other hand make the bike is less prone to failure because it has less components that can be broken in a fall.
The engine feel is an abundant yet controllable power sensation, the torque starts at low RPM and is present in the entire rpm range, the suspension is plush and comfortable, its drawback is in tight circuit sections where its size and weight makes it difficult to turn and maneuver against more modern machines. Strong points are in fast open sections, sand, hillclimb and rocks.
Although the bike is no longer in production, it has many die hard fans around the world and is still present in many off-road events around the globe.
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