![]() Most of the chassis of the 1987 Fourtrax remained the same. Additionally, the cylinder was changed to include a bridged intake. The 1987 model year, now absent the three-wheelers due to the CPSC ban, saw the engine receive a five-millimeter longer connecting rod, accompanied by a piston with a wrist pin bore raised five millimeters. Although mechanically similar, Honda detuned the engine for use in the Fourtrax, through reduced compression and less aggressive porting, to ensure that the added weight of the quad would not adversely affect the reliability of the engine. Honda borrowed many parts from its 3 wheel ATC250R for the Fourtrax’s design, including the engine and rear suspension. The TRX250R was introduced for the 1986 model year to answer Suzuki’s LT250R, released the year prior. Hydraulic disc with twin-piston caliper, 186mm discĢ2x7-10 Ohtsu H-trak M/R 101 Radial (option)Ģ0x10-9 Ohtsu H-trak M/R 501 Radial (option) Single compression rebound and preload adjustable Showa shock with Pro-Link linkage / 9.1" Travelĭual hydraulic discs with twin-piston calipersĭual hydraulic discs with twin-piston calipers, 174mm discs Water-cooled, two-stroke cycle, single cylinder, reed valve, counterbalancedĬhain and Sprocket / 13:39 / 520 O-ring ChainĬhain and Sprocket / 13:38 / 520 O-ring Chainĭual A-Arm w/ 5-way preload adjustable Showa Shocks / 7.9" Travel 4 Honda's Reasoning Behind Use of 4-stroke engines in modern Sport ATV’s. ![]()
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