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Here we'll present an original project in Portugal, our friend Delio from Évora decided to fit a TDR 250 engine in a TZR 125 chassis, obtaining a TZR 250.
Bellow you can see the evolution of this project, it's not 100% finished yet, but it will be very soon.
There are some video footage of the bike the 1st alive.
"The purpose of this project is to make a 2-stroke 250cc inline twin race bike combining parts from diferent Yamaha TZR250 models. The main ideia is to fit the first generation TZR250 (2MA) engine (1KT) in a last generation v-twin TZR250 chassis (3XV model).
Considering the small probability of finding a 3XV chassis (very few were sold in portugal) and a 2MA engine, i started with a 4FL chassis wich is basicaly the same as the 3XV (the 4FL model is a 125cc TZR and uses similar frame, wheels, and very similar brakes and suspensions) and I bought a TDR250 in relatively bad shape to make use of the engine. The TDR250 engine is basicaly the same engine used in the 2MA TZR (1KT engine), but with a lowered first gear ratio, better cooling and a CD ignition with a digital advance...in fact The TDR250 is the world's first two-stroke bike to use a CD ignition with digital advance system." by Delio, owner of the "TZR 250" prototype
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Pistons: 2x Prox TZR/DTR 125 (56.4) |
Stroke: Stock (50 mm) |
Cylinders: stock (1KT) |
Cylinder heads: stock (1KT) |
Radiator: Stock TZR250 2MA |
Sparks: NGK BR9EG |
Exhaust valves: YPVS |
Reeds :2x TZR125 reeds |
Carburetors: stock Mikunis TM 28 rejeted |
Air Filters: doesn't use any kind of air filter |
Electric part: Stock flywheel |
Clutch: Stock |
Exhaust systems: Home hand made by the owner |
Silencers: Firebox |
Oil: Direct mixture in the deposit, 2,5% |
Transmission: 14-43 DID chain o’ring |
Gearbox: Stock 6 gears |
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Wheels: Yamaha FZR600, 3.0p front 17' and 3.50p rear 18' |
Tires: Bridgestone CYROX RADIAL 110/70/17' front & Dunlop MAXARROW 130/60/18' rear. |
Brakes: 4 piston Yamaha TZR250 3XV/3MA & double 280mm rotors front & rear BREMBO with 265mm rotor. |
Braking system: in future stainless steal |
Suspension: Front Yamaha TZR 4FL in future with Maxton cartridges and rear TZR125 4FL trophy shock |
Steering Damper: 6 possible regulations |
Frame: Yamaha 4FL aluminium modified to fit 1KT engine |
Swingarm: Stock Yamaha TZR 4FL |
Chain: DID o’ring 520 |
Bodywork: modified Yamaha TZR 3XV/4FL and Cagiva mito/Ducati 916 |
Headlight: Cagiva mito /Ducati 916 |
Stop light: Custom |
Seat cover: stock Yamaha TZR 3XV/4FL |
Paint Scheme: custom |
Paint color: To define |
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