Yamaha RD/RD500

20 Апр 2015 | Author: | Комментарии к записи Yamaha RD/RD500 отключены
Yamaha RD 500 LC

Yamaha RD/RD500

John H Licensed to About.com

The middle 80s was a time for classic motorcycles. bikes were coming out year with more and speed and it was the last time performance 2-strokes would be to the buying public as part of the manufacturer’s line-up.

For many the Japanese manufacturers had dominated Grand Prix racing forerunner of today’s MotoGP™), in the 500-cc class. Two Japanese dominated the 500 GP class between from 1975 until the of MotoGP in 2002: Suzuki and (Valentino Rossi was the last of a Grand Prix World on a 2-… 500 in 2001 on the Honda

In 1984 Yamaha introduced the thing to a Grand Prix 500 bike with their 500-cc V-four RZ500. introduced their equivalent the RG500 Gamma. in 1985). famous by the likes of Kenny and Eddie Lawson, the 500-cc racer s were at the peak of development with the V-four and much of the Grand Prix technologies were transferred to the street bike.

Although not imported directly the US (due to EPA restrictions), the classic has been imported from countries for collectors and track day alike, with a few states them to be ridden on the street.

are two distinct versions of the RZ. The more available is the export version differs from the Japanese version (RZV500R) primarily in the construction. However, the Japanese was less powerful, again due to

The export version used a frame (painted to look whereas the domestic version had a light weight extruded box section frame.

V-4 Engine

The engine on the Yamaha is directly from the 2-… Prix racers having cylinders arranged in a square ‘V’ at 50 degrees) formation with the cylinders raised to reduce the length of the engine/gearbox unit. the V-four is two connected (geared) parallel twins.

The intake on the RZ reed valves whereas the used disc valves. induction for the two front cylinders on the RZ from their rear in that the lower pair the engine through crankcase and the rear through the cylinders ported).

Also interesting in design is the company’s decision to use a balance shaft, placed low in the between the two cranks. It is interesting the Suzuki Gamma that a year later did not use a counter system and the Suzuki was considered a smooth running engine.

YPVS (Yamaha Power System)

The RZ engine used the YPVS (Yamaha Power System) as found on many of the Yamaha motorcycles (The 250 and 350 also used an identical and helped to increase the mid range Along with the YPVS, the RZ uses the race proven chamber exhausts—each cylinder its own system.

Although the RZ has a number of in its 2-… engine, it does, produce its power in a distinct with little power 6,000 rpm. At 6,500 rpm the arrives in a typical racing fashion: hard!

The suspension on the RZ is a of proven technology, innovative and marketing gimmicks. Proven is the front fork system to the LC version, proven is the adjustable and adjustable rebound damping (as on the RZV500R), gimmicky is the generally brake linked anti system.

The rear suspension is innovative the shock mounted under the unit. The unit is operated by The preload and rebound damping are adjustable. The location of the shock was of necessity because of the engine

The position where the shock typically be mounted on a cantilever is now full of the rear cylinder chambers forcing the designers to the chock in this unorthodox (- la Buel).

Riding Impressions

The on the RZ leaves a lot to be desired. A steep angle with a 16” diameter tire should promote steering and ease of corner However, this specification is negated by the large section and weight of the bike.

Generally opinion from was that the bike needed effort to lean into a but was stable once leaned and it was very stable in a straight

Yamaha RD 500 LC


Engine: Water-cooled four cylinder arranged in a ‘V’ (two forward, two rear) at 50 degrees. Bore 56.4-mm x 50.0-mm giving a capacity of cc.

Induction: Reed valve 26-mm carbs.

Exhausts: (Yamaha Power Valve variable port diameter four expansion chambers.


Transmission: 6-speed via wet multi-plate and chain final drive.

dry weight: 451 lb’s (205 for the RD500LC, 431 lb’s (196 for the RZ500R

Front Brakes: Twin with twin opposed calipers.

Rear Brakes: rotor with twin piston caliper.

Front 120/80-VR16

Rear tire:

Prices for these machines considerably from $8,500 to $40,000 for a pristine example extensive modifications (aluminum plus engine race as an example.

Yamaha RD 500 LC
Yamaha RD 500 LC

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