Engine

• Both the base and ABS 2005 GL 1800 drew power from a four stroke, horizontally-opposed six-cylinder engine. This engine had a displacement of 1832 cc. Its bore measured 2.9 inches and its stroke measured 2.8 inches. The engine had a compression ratio of 9.8-to-1. This engine produced 118 horsepower at 5,550 rpm and 123.2 foot-pounds of torque at 4,000 rpm. Honda equipped it with a single overhead cam. The engine used a computerized fuel injection with automatic choke. Each cylinder had two valves. A computerized digital ignition controlled the firing of the spark plugs. This bike also came equipped with a liquid cooling system.
  
  

Transmission

• Riders were able to start the GL 1800 with the electronic ignition and shifted through the gears of the five-speed manual transmission that Honda installed on both the base and ABS GL 1800. These motorcycles transferred power to the rear wheel via a Cardan drive.
  
  

Performance

• In 2006, the "Motorcycle USA" website tested the 2005 GL 1800 and reported that it accelerated from 0 to 60 mph in 4.13 seconds, reaching 100 mph in 11.32 seconds. The GL 1800 passed the quarter-mile mark in 12.4 seconds at a speed of 109.4 mph. This review reported a highway fuel economy of 30 mpg at speeds averaging 80 to 85 mph.
  
  

Dimensions

• In 2005, Honda built both variants of the GL 1800 on the same aluminum frame. This gave the bikes an overall length of 103.7 inches, with a 66.6-inch wheelbase. The motorcycles stood 57.3 inches in height, with a seat height of 29.1 inches. The GL 1800 had an overall width of 37.2 inches and a ground clearance of 4.9 inches. Without fuel or oil, the ABS models weighed 800.3 pounds, and the base model weighed 793.7 pounds. Honda installed a 6.6-gallon fuel tank in both models. The truck provided 61 liters of storage space.
  
  

Wheels

• In 2005, Honda outfitted both variants of the GL 1800 with size 130/70-18 front and size 180/60-16 rear tires. Both the front and rear wheels took disc brakes. A base model featured a pair of 296-mm-diameter discs on the front wheel and a single 316-mm-diameter disc on the rear wheel; each had 3-piston calipers. The ABS model used the same size discs and 3-piston calipers that came on Honda's base model. A GL 1800's front suspension consisted of a 45-mm fork that yielded 140 mm of travel; the single-side, single-shock swing arm rear suspension allowed for 104 mm of travel.
  
  

Features

• The display panel on both models included a tachometer, speedometer, coolant level, temperature and fuel level gauges. A mounted LCD showed a clock, while a separate LCD indicated trunk-open warnings, stereo settings and high beams, among others. Honda equipped the GL 1800 with a Panasonic AM/FM stereo with a single CD player and two speakers, and offered an upgrade to an in-trunk six-disc CD changer, 40-channel CB radio and higher wattage rear speakers. Honda offered this bike in six available colors.