Yamaha TDM 850 or also just called Yamaha TDM series is Adventure touring bike / Dual-Purpose motorcycles. Yamaha TDM powered with 849cc of engine displacement, 4-stroke type, DOHC techno, and liquid-cooled for cooling system. You must to know that TDM is two-cylinder bikes. While talking about performance and power, Yamaha TDM usually has 60-62 true hp,( yamaha claimed 78bhp) and have a good torque. in 1992 and 1993, Yamaha TDM 185 was imported into the United States, there is only 2 years. In 1996 Yamaha released the Mk2 TDM ( New Yamaha TDM), Top speed of Yamaha TDM 850 around 220km/h.
Yamaha TDM 850 specs
Type 4-stroke, DOHC, liquid-cooled
Forward Inclined Parallel 2-cylinder
Displacement 849 cc
Bore x Stroke 89.5 x 67.5 mm
Compression Ratio 10.5:1
Maximum power (claimed) 78 bhp 56.6 kW)@7500 rpm
Maximum power (True hp, measured) 60-62 true hp @7500 rpm, all stock
Maximum Torque (claimed) 8.1 kg-m @ 6000 rpm
Starting System Electric
Lubrication Dry sump
Carburetion 92-93 all locations Mikuni BDST38/2 38mm CV type
Carburetion 94-97 all locations Keihin CV type
Primary Reduction Ratio 67/39 (1.718)
Secondary Reduction Ratio 42/17 (2.471)
Clutch type Multiple disc , Wet
Transmission Type Constant mesh 5-speed
Gear Ratio 1st 37/13 (2.846)
Gear Ratio 2nd 37/20 (1.850)
Gear Ratio 3rd 30/21 (1.429)
Gear Ratio 4th 27/23 (1.174)
Gear Ratio 5th 28/27 (1.037)
Ignition System T.C.I. (digital)
Final Transmission Chain
Chassis
Overall Length 2170 mm
Overall Width 780 mm
Overall Height 1280 mm
Seat Height 795 mm
Wheelbase 1470 mm
Minimum Ground Clearance 160 mm
Dry Weight 198 kg
Frame Type Steel, diamond shaped
Caster Angle 25°
Trail 105 mm
Fuel Tank Capacity 20 L
Front Suspension Telescopic fork 41mm
Rear Suspension Swinging arm (monocross)
Front Wheel MT3.00 x 18, Aluminum
Front Wheel Travel 149 mm
Rear Wheel MT4.00 x 17, Aluminum
Rear Wheel Travel 140 mm
Front Brake Dual discs, 298 mm diam
Rear Brake Single disc, 245 mm diam
Front tyre 110/80 ZR18
Rear tyre 150/70 ZR17
(specs and reference:wikipedia)
Truly, Yamaha TDM 850 is one of Yamaha TDM variant, this is perfect for all-track, the dual-purpose series always come with powerful torque and great suspension. Yamaha TDM bodywork designed for "hard" way that comfortable for sport and also long-trip/ touring.
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