Please Note: This bike is currently in long-term storage condition. Per the seller, this entailed “removing the heads and pipes and coating them with thin grease to guarantee no corrosion. The carbs are drained and silicone packets sit in the carburetor bowls to guarantee no moisture. The same is true of the tank. The ports are sealed, the power valves are coated and the coolant is full-strength ELC.” The seller has provided two quick videos from the last time it was run (just over one year ago), we have combined them into one video here:
Ever since its introduction in the early 70s, Yamaha’s parallel-twin TZ racers were a popular choice for privateer racers. The 80s were full of significant updates for the model, including reed valve induction in 1985 and the Deltabox aluminum frame a year later.
In 1988, Yamaha released the TZ250U, which featured reversed cylinders and a cassette transmission. This led to the distinct-but-normally-hidden position of the carbs hanging off the bottom and feasting from the front, which lowered intake temperatures and helped slightly with the center of gravity.
This example is VIN: 3AK000537. The seller acquired it from a private party 14 years ago.
There is no odometer, true mileage is unknown.
“This bike came to me as a numbers matching painstakingly restored-to-factory spec collection piece. I have modified the bike for full time racing purposes, removing and archiving the components from its restoration and reconfiguring it to compete with its 1989 and 1990 brethren. I have competed at nearly every venue on the Eastern seaboard and some races as far west as Road America and Mid Ohio on this bike.
This bike has travelled with me for the better part of 14 years and never missed a race season. I have complete consumable spares for the bike to last as additional 5 seasons of racing, and a full tuning and setup guide as well.”
Modifications:
“The bike is fully restored to new condition. This rebuild included all transmission bearings, full new clutch machined from the 5AK components, new +5mm high duration crank (Ed Toomey rebuilt), new pistons, o-rings and gaskets.
The engine is tuned to a .78mm squish and runs happily on C12 with 20:1 Amsoil. The ignition and power valves are controlled by a fully custom programmed Ignitec ignition module. Internally the engine utilizes the 4DP piston with custom machined 8cc cylinder heads. The U cylinders were swapped with W cylinders for the better transfer port configuration and port match to the unmolested U crank case with the 5mm cylinder spacer plate performing the blend zone.
Race Tech fork internals replaced the originals but again the original damping rods were preserved and FZR rods modified to allow for the updated valving. The original shock was of course removed and a fully adjustable Penske rides in it’s place.
The front (extremely rare) rotors were removed along with their accompanying caliper spacers replaced for 320mm units.
The original 1.5 AH NiCad battery pack was long expired and replaced with a 6 AH Milwaukee battery.
The bike is heat cycled, test ridden, and 100% ready to race.
Inside of the tank:
The sale includes an extensive list of spares:
“Engine spares:
1 new +5mm Toomey built high duration crankshaft
1 full +5mm Pro-X crank rebuild kit
Additional Crank related parts
2 new OE outer cylinder bearings
4 used OE outer cylinder bearings
3 new OE crank pins
6 new labyrinth seals
3 new ign side seals
2 new right side seal plugs
2 new B0 4DP pistons
5 new rings
2 new piston pins
7 new small end bearings
25+ new circlips
2 near new condition 3AK cylinders
2 near new condition 3AK heads
2 used 3AK heads
6 outer clutch frictions
9 inner clutch frictions
12 new clutch steels
6 new springs
2 new rivet and plate kits
2 full “used but serviceable” friction disk sets
1 used basket
1 new clutch hub
1 new clutch basket
2 new clutch cylinder bearings
14 new transmission shaft bearings
4 new “620T9” transmission bearings
2 new “22057” cylinder bearings
2 new clutch seals
6 new transmission shaft seals
1 full transmission set including shafts, and shifter with alt 2nd gear
1 spare oil pump
2 “62085” water pump bearings
2 used power valves
2 power valve covers
1 full OE hose kit
10 new water jacket o-rings
12 new cylinder seal o-rings
20 new reeds
12 new water spigot gaskets
12 new Gasket Guru .8mm base gaskets
1 OE new .8mm base gasket
7 OE new .65 base gaskets
1 OE new .60 base gasket
3 new clutch gaskets
19 new reed cage gaskets
2 new silencer gaskets
4 new carb top gaskets
4 water pump gaskets
1 oil pump gasket
4 new Denso 1WM01-32 plugs
2 150KM used pistons
4 250KM used B0 4DP pistons
Chassis spares:
1 fully rebuilt OE shock
2 sets of OE front springs All OE damping rod internals
2 new vortex clip-ons
2 used OE clip-ons
1 new OE fork cap
2 new swing arm thrust bearings OE stand & rod
2 new pegs
2 new left side OE cast peg brackets
1 new right side OE cast peg bracket
1 4.5×17 Marvic rear with rotor
1 5X17 NOS PVM rear wheel with new Bridgestone rain and rotor
1 3.5×17 Marchesini with new Bridgestone rain and rotors
2 new EBC rotors for above wheel
1 5X17 magnesium Marchesini on bike with 1 full race on Bridgestone VO2
1 3.5×17 Marvic on bike with one full race Bridgestone V01
1 new in wrapper V01 slick
3 new in wrapper V02 slicks
Full OE Jet kit (all actual Mikuni jets)
1 new FULL bodywork kit
Front sprockets- 13,14,15,16
Rear sprockets- 37,38,39,40,41,42
New DID chain.”
Cosmetic Blemishes: please see the album in the “Photos” tab for all known cosmetic blemishes. Here is a selection:
“Small frame mark near head stem, OE patina paint.”
Currently located in Stanley, New York, this Yamaha is offered on a Bill of Sale only. Have any TZ250 stories or questions about this listing? Let us know in the “Comments” tab!
