|Manufacturer||Yamaha Motor Company|
|Product Line||YZ-series motorcycles|
|Model||Various (see below)|
|See comparison table below for technical information|
|Appearances||The Fakest Things Alive, Sonicross, Chrome And Dirt|
|Original Creator||Don Jones|
The Yamaha YZ is a series of two-stroke and four-stroke motocross bikes produced by the Yamaha Motor Company from 1973 onwards.
Introduced in 1976, the Yamaha YZ400 (YZ400C) was thought to be little more than a repainted version of the Yamaha MX400. However, it incorporated a number of "works" parts that weren't on the MX400. The YZ400C had good performance, but the frame and handling were flawed.
In 1977, Yamaha redesigned the frame, engine and suspension. The YZ400D was an improvement over the earlier model, but handling was still lacking because the round swing arm tended to flex when cornering.
For 1978, the rear swing arm was replaced with a boxed aluminum swing arm. Suspension travel was increased as well. Out of the whole YZ400 range, the YZ400E is considered to be the best of the bunch.
1979 saw another redesign for the YZ400. The YZ400F (not to be confused with the four-stroke machine of the same name) got improved handling, FIM-type side number plates and a new engine. However, a number of people consider this engine to be a step backwards from the 1978 engine.
Add your fanfics & games here!
Sonic brings home a 1978 YZ400 in The Fakest Things Alive. It is implied to be dirty and/or worn out, judging by what Sally said. By the time Sonic returns, Tails has made numerous modifications to the bike. For example, he replaced a number of parts with lightweight parts made of a titanium-magnacarbide alloy. Tails also put on a specially-modified kickstand & footpegs so that people as tall as Sonic can ride it more easily.
To personalize it, Tails painted it blue with red stripes & yellow fenders, put Sonic's name on the gas tank and the Sonic Team emblem on the side number plates. The newly-modified bike gets the nickname "Whirlwind" (not to be confused with the MTP-01 Whirlwind). However, Sonic doesn't get a chance to ride his sweet new moto-rocket because he has to run away from Sally, Amy, Rouge, Shadow & Antoine.
Mim'li and Vul'garid steal 1976 YZ400's in order to track down Sonic and Tails after being ordered by General Atokad in The Delta Project. They were filled with traditional blue Del'taan designs, and with high-tech weaponary and engines. One is eventually stolen by Sonic, though later taken back by Mim'li. They are later both stolen back by a Deserter named Al'awonn, and fitted with space travel technology, and become unrecognisable from their original form. These were then given back to Sonic and Tails.
|Technical Specs & Comparison|
|Engine||397 cc, two-stroke, one-cylinder, air-cooled, 7-port reed valve gasoline engine||396 cc, two-stroke, one-cylinder, air-cooled, 7-port reed valve gasoline engine|
|Bore Stroke:||85 mm x 70 mm||82 mm x 75 mm|
|Power (crank)||34.40 hp @ 7,500 rpm||Unknown||Unknown||36.9 hp @ 7,000 rpm|
|Carburetor:||Mikuni VM38SS 38mm||Mikuni VM38SC 38mm||Mikuni VM38SS 38mm|
|Transmission:||5-speed manual with wet-plate clutch|
|Final Drive:||#520 chain|
|Seat Height:||34.84 in||Unknown||36.1 in|
|Ground Clearance:||Unknown||11.8 in|
|Wheelbase:||56.1 in||Unknown||7.1 in|
|Dry Weight:||Unknown||224 lb||Unknown||225 lb|
|Wet Weight:||252 lb||229 lb||241 lb||239 lb|
|Suspension Front:||Kayaba 36 mm Telescopic, coil spring, oil damped, spring pre-load fully adjustable, rebound compression damping force adjustable.||Kayaba 38 mm Telescopic, coil spring, oil damped, spring pre-load fully adjustable, rebound compression damping force adjustable.||Unknown|
|Suspension Rear:||Monoshock, gas/oil damped, coil spring, spring pre-load fully adjustable, rebound damping force adjustable||Monoshock, other specs unknown|
|Brakes Front:||Drum, 130 mm||Drum, dimensions unknown|
|Brakes Rear:||Drum, 160mm||Drum, dimensions unknown|
|Fuel Tank Capacity:||2.1 gallons||2 gallons|