Ebay find: YZR500

Another sweet custom up for sale on the ‘bay. A MotoGP replica YZR500. Beautiful. Auction here.

About 5 years ago I began the project of building a replica of the 1991 Yamaha YZR 500, as raced by the great Wayne Rainey. No expense was spared in this incredible build. What does it take, besides big $$$, to complete such a build.

First and foremost, I commissioned master bike builder and fabricator Wyn Belorusky for the build. Wyn can fabricate just about anything out of billet aluminum. In addition, he built for himself a YZR500 replica which has been featured in several magazines internationally.

The Build began:


Finding a titled frame was not easy, but patience pays off. A real Japanese RZV500 frame, which is the lighter aluminum version of the RZ500 steel frame offered elsewhere. 11 digit VIN, titled in Florida, in my name. The sub frame has been modified by Wyn. He installed custom billet Y supports, eliminating the stock sub frame bracing to clean up the rear of the bike for use with YZR bodywork. After all machine work was complete, the frame was freshly powder coated black.

Aprilla RS250 gull wing swingarm. This is an ideal choice, having the same length as the stock RZV swing arm, with the look of the YZR 500. Extensive modification was performed by Wyn to fit this swing arm to the RZV frame, shock linkage, and rear brake hanger. Once fabrication was completed, the swingarm was also freshly powder coated black.


Wilbers rear shock, with ride height adjust and remove reservoir.

Wyn also fabricated and installed a separate billet adjustable ride height linkage strut for additional adjustment. New Ohlins steering dampener, custom fabricated mount by Wyn.

2007 R6 forks, modified lower triple tree to accept a RZV500 steering stem for installation. 2007 R6 wheels front and rear.

I have a small fortune in the brake setup on this bike; Brand new billet Brembo front brake calipers, custom braided brake lines front and rear from Yoyodyne, New Brembo Radial front master cylinder, R6 rotors front and rear, R6 rear master cylinder and caliper.


I started with a complete low kilometer stock RZV500 motor, bench stock from Mr. Belorusky, thank you very much. The motor was crated and shipped to Martin Marino of Madmann Engineering. Along with the motor I purchased and supplied a complete Brand New Yamaha OEM top end, Brand new Yamaha RZV500 cranks, new clutch, and new OEM Yamaha gaskets. Martin did a full high performance build with mostly brand new parts to work with. His porting, milling, and modification to the reed cages makes these motors come alive! Check out his link.


It’s set up for premix in its current state per Martin’s recommendation. I have an oil reservoir and set up to run the oil injection, which will be included in the auction, should the new owner wish to run the injector. It can run safely on 93 octane, but the motor does like the race gas. Additionally, brand new mikuni 28mm flat slides were purchased and installed, along with K&N individual filters, and new throttle cables. The motor makes great power, is jetted just a little rich to be on the same side (I’m at sea level in Florida) and runs cool. The stock RZ has a habit of the rear cylinders running hot. Rick Lance added an accessory radiator to allow additional cooling of the rear cylinders


Jim Lomas stainless steel GP chambers, with carbon fiber canisters. Built to order in Czechoslovakia, the quality and workmanship is amazing. The sound, weight savings, and performance are equally impressive. Wyn did a beautiful job in modifying the exhaust hangers on the pipes to fit with the new swing arm, and the upper pipes were gently molded to slightly point inward to replicate the upper YZR pipes on Rainey’s bike


Many years ago, Wyn was fortunate enough to borrow a set of REAL Yamaha YZR bodywork from a 1991 works bike, just long enough to make molds. Genius! From these very molds comes the bodywork on my bike. It’s the real deal. The custom brackets Wyn fabricated for mounting the bodywork is nothing short of artwork. Additionally, all quick release pins and real Dzus fasteners were used. Careful custom modifications were performed to allow installation of the functional headlight and tail light. A custom windscreen was fabricated as well, which fits perfectly.

I saw Rainey’s 1991 YZR500 in Laguna at the 2005 MotoGP, and took many pictures. This was an invaluable reference point for the build, particularly matching the color and logos. Paint by Paula in Titusville, Florida performed the paint work. She used a very rich pearl white, along with a day glow orange (from the house of color) to match Rainey’s bike. No decals were used; all work was done with paint. It does look sweet, and correct to Rainey’s 1991 YZR500.


The rearsets are custom fabricated by Wyn Belorusky. Included are two separate sets of rearset brackets, one for the stock position as pictured, and a set for the full race position. I initially had the race ones made, but then subsequently had a stock set made as I have only ridden the bike on the street. Again, both sets are included. They are beautiful. Wyn even machined the right side foot peg to fold up, to allow for clearance of the kickstarter when starting (like the stock RZV right side foot peg does). It’s the details that I love!

The dash was a custom fabrication setup with the tachometer mounted, a Daytona digital Temp gauge, and a GPS which can be used as a speedometer.

The sprocket cover was modified, by shortening the rear portion and milling out the holes. It turned out sweet. The right side engine cover, water pump, and left side sprocket cover were also sand blasted to give the appropriate GP look.

Wyn took the wiring harness and stripped any unnecessary wires, then cleanly wrapped and reinstalled all wiring. It’s very neat.

New 520 chain/sprockets, custom billet swingarm spools.

More Photos:


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