![]() If there are any mistakes, please contact me. All Honda three-wheelers had been four strokes prior to this, the 248cc two-stroke that was used in the ATC 250R was far more suitable for racing, Honda coupled it with front and rear. Information on this page is provided in good faith that it is accurate, but in no way is the data guanteed to be accurate. The Honda ATC 250R was first introduced in 1981 with an air-cooled, two stroke, single-cylinder engine and one intention to dominate three-wheeler racing. THE 1986 TRX 250R AND 1986 ATC 250R OBVIOUSLY ONE HAS 3 WHEELS AND ONE HAS 4. Sandblasted and powdercoated frame and components. Blend cylinder to match the sleeve ports, not visa-versa. The only bearings included are the clutch actuation. For 2-stroke cylinders, blending or matching the ports is vital to the performance of the engine. 019 mmĬonnecting rod (sm end inner diameter) - 21.997 - 22.1983 ATC250R Specifications General Specs Frame up restoration performed by the 250R Candy Shop in Sugarloaf, PA. This is a new set of left & right sides inner engine cases for the Honda ATC250R 85-86 & the TRX250R 86-89. Another honda atc 250r engine brought back to life with a fresh coat of glacier black cerakote. Piston/cylinder clearance - 0.060 - 0.080 The ATC350X was not competitive on professional circuits, and was better suited to amateur racing and recreational riding.Įngine type - Water-cooled 1985–1986, 2-stroke, single-cylinderĭisplacement - 248 cc for 1981-1984 or 246 cc for 19 From in-house, the ATC250R is often compared to the Honda ATC350X, a sport ATC featuring a 350cc 4-stroke engine. The Honda ATC250R's competition came largely from the Kawasaki KXT Tecate 250 and Yamaha Tri-Z 250, and to a smaller extent from companies such as Tiger ATV. The ATC125R, ATC200R, ATC300R, ATC350R, ATC400R, ATC480R, and ATC500R were all tested at various times during ATC production. Winderosa Gaskets are extremely high quality US made gasket sets. These machines were designed for several displacement classes. TRX250R Winderosa Complete Gasket Set and Seal Kit This complete engine gasket set also includes all of the engine oIl seals crank, kickstart, countershaft, and ETC. Honda created the ATC250R as a consumer sport ATV, but would offer multiple variations to their factory racing teams in the 1980s. Two 1985 Honda ATC 250Rs Competitive Racing The four-wheeler used many of the same components as the ATC250R, including a slightly detuned version of the ATC's engine. Though sold concurrently, the Honda TRX250R would remain in the Honda line-up until 1989, effectively becoming the ATC's successor. While rumors persist that the 1987 Models were intended to feature new colors, a redesigned logo, and possibly keyed ignition, these models were virtually identical to the ‘86 offering. The 1987 ATC250R models were released in limited numbers in Europe and Canada. US Dealers were instructed to remove the motors and other common parts of remaining models, and then cut the frames in half to prevent new sales. This would be the last Generation offered for sale, discontinued in the United States in 1986, after an agreement between manufacturers and the Consumer Product Safety Commission to cease production on all 3-wheeled ATVs resulting from thousands of legal battles regarding safety issues and high accident rates. Buy OEM QUALITY Complete Engine Oil Seal Kit for the 1985-1989 Honda ATC & TRX 250R Fourtrax: Seals - FREE DELIVERY possible on eligible. Fuel was delivered via a 34 mm round carb in 1985 and flat slide carburetor for the remainder of production. This 2-stroke engine was notable for not incorporating a power-valve, featured commonly on other machines by 1985. Honda ATC/TRX 250R NATIONAL Engine Kit Kit Includes PTR Pipes (midrange or type 6)(factory finish), Fat Boy 2 Silencer, PTR NATIONAL Porting, Powerhead. In 1985 the ATC250R was updated with a 246cc liquid cooled engine, and 6-speed transmission. While the engine design remained similar, the Fuel delivery was increased from the previous 27 mm, to a 30 mm round-slide carburetor The 1983 ATC250R incorporated many improvements, introducing the Pro-Link suspension, folding foot pegs, a larger fuel tank, slightly longer travel suspension in front and rear. Both of these four-stroke models were sluggish and poorly suspended when compared to the 2-stroke ATC250R, which borrowed heavily from the Honda CR250R motocross line. While ATC racing was in its infancy, racers had to rely on Honda's ATC110 and ATC185 models on the racetrack. The introduction of the 1981 ATC250R marked a milestone in off-road history, as it was the first two-stroke ATC designed specifically for racing.
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