Difference between revisions of "Yamaha TZR250RS"
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{{ | {{Motorcycle | ||
|name = | |name = Yamaha TZR250RS | ||
| | |photo=Yamaha-TZR-250RS-93.jpg | ||
|aka = | |aka = | ||
|manufacturer = Yamaha | |manufacturer = Yamaha | ||
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|dry_weight = 126 kg / 277.8 lbs | |dry_weight = 126 kg / 277.8 lbs | ||
|wet_weight = | |wet_weight = | ||
|fuel_capacity = 15 | |fuel_capacity = 15 Liters / 4.0 gal | ||
|oil_capacity = | |oil_capacity = | ||
|recommended_oil=Yamalube 10w-40 | |||
|fuel_consumption = | |fuel_consumption = | ||
|turning_radius = | |turning_radius = | ||
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==Chassis== | ==Chassis== | ||
It came with a 110/70 Z17 front [[tire]] and a 150/60 Z17 rear tire. Stopping was achieved via 2X disc 4 piston calipers in the front and a Single disc 2 piston [[caliper]] in the rear. The front suspension was a 39mm Upside-down forks while the rear was equipped with a Monocross linkage. The TZR250RS was fitted with a 15 | It came with a 110/70 Z17 front [[tire]] and a 150/60 Z17 rear tire. Stopping was achieved via 2X disc 4 piston calipers in the front and a Single disc 2 piston [[caliper]] in the rear. The front suspension was a 39mm Upside-down forks while the rear was equipped with a Monocross linkage. The TZR250RS was fitted with a 15 Liters / 4.0 gal fuel tank. The bike weighed just 126 kg / 277.8 lbs. The wheelbase was 1340 mm / 52.8 in long. | ||
== Photos == | == Photos == | ||
[[File:Yamaha-TZR-250RS-93.jpg|600px|Yamaha TZR250RS]] | [[File:Yamaha-TZR-250RS-93.jpg|600px|Yamaha TZR250RS]] | ||
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|- | |- | ||
!Fuel Capacity | !Fuel Capacity | ||
|15 | |15 Liters / 4.0 gal | ||
|- | |- | ||
!Top Speed | !Top Speed |
Latest revision as of 22:37, 23 November 2019
Yamaha TZR250RS | |
Manufacturer | |
---|---|
Production | 1993 |
Engine | Two stroke, 90° V-Twin cylinder, read valve induction |
Compression ratio | 7.5:1 |
Top Speed | 112 mph / 180.2 km/h |
Ignition | Microcomputer controlled |
Transmission | 6 Speed |
Suspension | Front: 39mm Upside-down forks Rear: Monocross linkage |
Brakes | Front: 2X disc 4 piston calipers Rear: Single disc 2 piston caliper |
Front Tire | 110/70 Z17 |
Rear Tire | 150/60 Z17 |
Wheelbase | 1340 mm / 52.8 in |
Seat Height | 780 mm / 30.7 in |
Weight | 126 kg / 277.8 lbs (dry), |
Recommended Oil | Yamalube 10w-40 |
Fuel Capacity | 15 Liters / 4.0 gal |
Manuals | Service Manual |
It could reach a top speed of 112 mph / 180.2 km/h.
Engine[edit | edit source]
The engine was a Liquid cooled cooled Two stroke, 90° V-Twin cylinder, read valve induction. The engine featured a 7.5:1 compression ratio.
Chassis[edit | edit source]
It came with a 110/70 Z17 front tire and a 150/60 Z17 rear tire. Stopping was achieved via 2X disc 4 piston calipers in the front and a Single disc 2 piston caliper in the rear. The front suspension was a 39mm Upside-down forks while the rear was equipped with a Monocross linkage. The TZR250RS was fitted with a 15 Liters / 4.0 gal fuel tank. The bike weighed just 126 kg / 277.8 lbs. The wheelbase was 1340 mm / 52.8 in long.
Photos[edit | edit source]
Overview[edit | edit source]
Yamaha TZR 250RS
Visually, the TZR is a spitting image of John Kocinski's 1990 world-championship-winning works Yamaha YZR250, save for its lights, turnsignals, passenger perch and lack of sponsorship decals. In actual ancestry, the TZR is a close relative of Yamaha's TZ250D production racer, the two sharing the same crankcases, bore and stroke, displacement and 12,000-rpm redline. As on the TZ, the TZR is powered by a counterbalanced, two-stroke V-Twin with a bore and stroke of 56.0 x 50.7mm for a displacement of 249cc. TZ-style reed valves and a six-speed, cassette-type transmission add to the list of road-race-quality components. Bloom provided us with a 1991 TZR to sample at Laguna Seca Raceway. Unfortunately, the only one he had available at the time was a Japanese-spec model limited by that country's strict home-market regulations to a claimed 45 horsepower-about one-third less than on non-restricted versions. But despite its reduced power output, it still impressed us with its overall performance. For one thing, the engine possesses a surprisingly wide powerband, attributable to its computer-controlled engine-management system. An eight-bit microcomputer controls the advance curve of the electronic ignition, the actuation of the exhaust pow-ervalve, and the fuel mixture provided by the flat-slide 26mm Mikunis. All of this allows the little 250 to pull cleanly and steadily from low rpm, but the real but the real
excitement is found on the upper floors of the rpm scale. Kept zinging
between 8000 and 11,000 rpm, the engine is surprisingly potent and exciting,
even if it does fall far short of the championship-caliber performance of the
YZR250 roadracer, which pumps out nearly twice the power of the TZR. Though
unable to measure top speed, we saw an indicated 155 kph (about 96 mph) over the
crest of Laguna's Turn One. But those who lust after 250 race replicas don't
expect Superbike-level engine performance. They place greater value on
lightning-quick handling, which is the TZR's greatest virtue. The bike's
aluminum, twin-beam Deltabox frame, allied with ultra-responsive steering
geometry (24 degrees of rake, 3.5 inches of trail) and a 278-pound claimed dry
weight, allowed the TZR to be flicked through Laguna's infamous Corkscrew with
almost ridiculous ease. But that agility also has its drawbacks, as the TZR's
responsive nature requires an equally light touch at the controls. Ham-fisted
riders need not apply.
Braking is outstanding. The TZR's 39mm inverted fork is fitted with
four-piston calipers pinching a pair of floating discs. Even under repeated
abuse around Laguna's 11-turn circuit, the brakes consistently provided
excellent feel and were resistant to fade.
Though our riding time on the Yamaha was limited, both fellow
Associate Editor Don Canet and 1 came away with a strong appreciation for the
TZR's phenomenal handling. No, the TZR250R will not break any speed records or
set blazing quarter-mile times; but when it comes down to consuming corners,
nothing currently in any manufacturer's U.S. lineup even comes close.
Matthew Miles 1992
Make Model | Yamaha TZR 250RS |
---|---|
Year | 1993 |
Engine Type | Two stroke, 90° V-Twin cylinder, read valve induction |
Displacement | 249.7 cc / 15.2 cu-in |
Bore X Stroke | 56 x 50.7 mm |
Cooling System | Liquid cooled |
Compression | 7.5:1 |
Induction | 2x Mikuni flatside carburetor |
Ignition | Microcomputer controlled |
Starting | Kick |
Max Power | 45 hp / 33.6 kW @ 9500 rpm |
Max Torque | 3.8 kgf-m / 40 Nm @ 8000 rpm |
Transmission | 6 Speed |
Final Drive | Chain |
Front Suspension | 39mm Upside-down forks |
Rear Suspension | Monocross linkage |
Front Brakes | 2X disc 4 piston calipers |
Rear Brakes | Single disc 2 piston caliper |
Front Tire | 110/70 Z17 |
Rear Tire | 150/60 Z17 |
Dimensions | Length 1960 mm / 77.1in Width 680 mm / 26.7 in Height 1075 mm / 42.3 in |
Wheelbase | 1340 mm / 52.8 in |
Seat Height | 780 mm / 30.7 in |
Dry Weight | 126 kg / 277.8 lbs |
Fuel Capacity | 15 Liters / 4.0 gal |
Top Speed | 112 mph / 180.2 km/h |