1964 Yamaha YG-1T Trailmaster 80
Taking it to the trails
January/February 2009
Chris Hartman
 |
Chris Hartman
|
Years produced: 1964-1966
Claimed power: 6.2hp @ 10,000 rpm
Top speed: 41mph
Engine type: 81cc 2-stroke, air-cooled single
Weight (dry): 63.5kg (140lbs)
Price then/now: $367/$1,000 - $2,500
MPG: 170
When you think of a vintage small-bore Japanese motorcycle for running in-town errands or slinging mud on a weekend camping trip, what comes to mind?
For many it’s a Honda Trail 90. But if you want something different, Yamaha’s YG-1T, also known as the Trailmaster 80, might be the bike for you — and in many respects it surpasses its more heralded competition.
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Out of the shadows
In the early 1960s, Yamaha was best known in America for its larger YD series of machines. It wasn’t until the introduction of the YG series in 1963 (and the lesser-known YJ series of 1964) that the small-bore crowd was treated to Yamaha’s wonderful mix of style, sportiness and 2-stroke innovation.
The YG1 was the more mainstream street-oriented machine, with a full front fender, two-place seat and sporty two-tone paint schemes. Today, the occasional YG1 comes up on eBay and would prove an excellent street machine on its own merits. But it’s the YG-1T that is getting our attention, as it deserves a little spotlight of its own, out from the shadows of the all-powerful Honda Trail.
First introduced in 1964, the Trailmaster 80 combined Yamaha’s then-new rotary-disc-valve 2-stroke engine, with a few well-chosen functional modifications to make it better suited for the occasional off-road journey. Items like the cut-down front fender, the small rubber mud flap, the solo seat with a sizeable luggage rack on the back and a skid plate mounted under the engine all work together to shout “Trail.”
In fact, when sitting next to their similar vintage Honda Trail 55 and 90 counterparts, the Trailmaster 80 fits right in, yet looks more refined. While the Hondas were based on the step-through Cub C100 series and flaunted their raw look with exposed components, the Trailmaster was based on a sportier street bike, and therefore carries over a few more stylish cues like the gleaming chrome fuel tank and low-mounted
chrome muffler.
Walk around
As with other mid-1960s tiddlers, the stamped multi-layer sheet metal frame forms the foundation, incorporating the central spine, headstock support and rear fender into one robust, yet lightweight, beam. Combined with sheet metal side covers, the frame carries the bulk of this bike’s bold red paint color. Sitting atop the frame is a tear-drop-shaped fuel tank gleaming in polished chrome. Small ribbed rubber kneepads fit snugly on each side, while an early-style Yamaha badge proudly displays its heritage. The comfortable solo seat complements the clean look, while the body-colored luggage rack hangs off the back fender, ready for a bag of groceries.
Up front, a pair of slender telescopic forks are capped by a compact combination headlight and speedometer housing. The front fender is unique to the Trailmaster and features a much slimmer cut compared to the full-bodied shape of the street-oriented YG1’s fender.
The Trailmaster is also unique in running a pair of 16-inch wheel rims, as opposed to the 17-inch setup found on most small street machines. This provides for a bit more clearance under the fenders to allow for a fatter 2.5-inch-wide tire. In fact, there is more than enough room for a 3-inch knobby tire, should one want a more dedicated trail machine.
The well-placed upper controls are simple yet stylish, and mount to a wide chrome handlebar with ample rise and pullback. The throttle, brake, clutch and choke controls are exactly where you would expect. The speedometer has markings up to 60mph (extremely optimistic given the short gearing), as well as neutral and low-fuel lights, even though the bike did not have wiring for the fuel light!
Almost lost in the chrome and gleaming red paint is the little 81cc mill mounted low-down in the frame. Being a rotary-valve 2-stroke, the engine is wider than it is long, and is an extremely light-weight unit, needing only two mounting bolts to secure it to the frame. The carburetor is out of sight, concealed in the right side case, and pulls air from a cylindrical-shaped air cleaner sitting atop the engine. The cylinder head and barrel are aggressively finned while the main engine and transmission cases have a smooth, sculptured look. This is further emphasized by the tightly radiused header pipe that runs into a slender low-mounted chrome muffler exiting well behind the rider’s right foot. The header pipe should retain its shape even after a hit or two thanks to the extremely sturdy pressed-steel skid plate mounted underneath the entire power unit.