Yamaha’s first 125cc 2-cylinder “sports” bike was the AS1, and it was notable enough to be one of the models featured in their Communication Plaza Collection at corporate headquarters. Per Yamaha’s site, “it employed Yamaha’s first 5-port (jet port) engine that added two auxiliary scavenging ports to the previous 3-port (intake, scavenging, exhaust) system to improve exhaust efficiency. It was also equipped with twin carburetors, the “Autolube” separate oil supply system and a return type 5-speed transmission for outstanding running performance.”
Yamaha claimed an output of 15 horsepower and period tests suggested it was capable of a top speed north of 75 miles per hour. These bikes were wildly popular in markets like the UK – Classic-Motorbikes calls it “the first of the real giant killers.”
Yamaha also made the AS1-C, which was more of a street scrambler version with high exhaust, high handlebars, folding pegs, and a painted tank (instead of a chrome panel as found on the regular AS1).
This example is VIN: AS1301064. The seller acquired it eight years ago from a Mecum auction.
The odometer shows 10,190 miles.
The seller states that he started and ran it once, then put the bike in storage. The bike has been restored in the past.
Maintenance:
In preparation for the listing, the seller had us perform a safety inspection. Our service department notes the following on their condition report:
Gas Tank Internal Condition: Tank internally rusted
Engine Oil Level: Low
Engine Oil Quality: Ok (Age Unknown)
2T Oil Level: Empty
Coolant Level: N/A
Coolant Quality: N/A
Front Hydraulic Fluid Level: N/A
Front Hydraulic Fluid Quality: N/A
Rear Hydraulic Fluid Level: N/A
Rear Hydraulic Fluid Quality: N/A
Clutch Hydraulic Fluid Level: N/A
Clutch Hydraulic Fluid Quality: N/A
Final Drive Condition: Worn
Headlight High Beam: Non-Functional
Headlight Low Beam: Non-Functional
Passing Light: N/A
Parking Light: N/A
Turn Signals: N/A
Tail Light: Non-Functional
Brake Light (Front Switch): Non-Functional
Brake Light (Rear Switch): Non-Functional
Plate Light: Non-Functional
Horn: Ok
Kill Switch: Ok
Brake Pad % Remaining Front: Drum Ok
Brake Pad % Remaining Rear: Drum Ok
Forks: Leaking
Shock/s: Ok
Tire Date Code Front: 21/06
Tire Date Code Rear: 08/06
Tire % Remaining Front: 95%
Tire % Remaining Rear: 95%
Tire Press. Front: 32 PSI
Tire Press. Rear: 23 PSI
Battery Standing Voltage: None Present
Charging Voltage @ 4k RPM: Unknown
Running Condition: Crank No Start
Test Ride Completed: None Taken
Test Ride Distance: N/A
Notes:
-Engine has spark.
-Engine compression measured at 120 PSI.
-Rear fender has dents.
-Paint has visible staining.
-Left foot peg is damaged.
-Fuel tank has internal rust/corrosion.
-Engine oil level is low, and the 2-stroke oil reservoir is empty.
-Drive chain is excessively worn and requires replacement.
-Headlight switch is non-functional.
-Rear lighting is inoperative.
-Tires are beyond the recommended service age and should be replaced.
-Front forks are leaking.
-Center stand is bent/twisted.
Recommendations:
-No Start Diagnostic
-Carburetor Clean
-Fuel Tank Clean
-Transmission Oil Change
-2t Oil Change
-Chain and Sprockets
-Electrical Diagnostic
-Front and Rear Tires
-Fork Rebuild
-Battery Replacement
Modifications:
This Yamaha appears to be stock.
Inside of the tank:
It is riding on Cheng Shin tires with date codes of 0806 and 2106.
The sale includes one key.
Cosmetic Blemishes: please see the album in the “Photos” tab for all known cosmetic blemishes. Here is a selection:
Currently located in Panorama City, California, (please make an appointment for an inspection) this Yamaha is offered on a Bill of Sale only. Have any YAS1-C stories or questions about this listing? Let us know in the “Comments” tab!
