1914 FeilbachOctober 25, 1913 The Feilbach Motor Co., of Milwaukee, offers three models of their Feilbach Limited for 1914. A single chain drive model, twin chain drive model, a a two-speed twin with worm gear and shaft drive.The single is practically without change from the 1913 machine. The twins are both entirely new so far as the motor is concerned, and the two-speed model is a most radical departure from the general motorcycle design. The single machine is equipped with a Feilbach single motor with 3 5/16-inch bore and 4-inch stroke.
The cylinder is offset to give a maximum thrust on the power stroke and to reduce pressure against the cylinder wall. Drive is by chain through secondary shaft and Eclipse clutch, the latter operated by a side lever. Forks, frame, control, etc., are the same as further described in connection with the twin.
A New High Power Twin
The new twin motor is rated at 10 horse power with 3 5/16-inch bore and 4-inch stroke, giving a total displacement of 69 cubic inches. As in the single motor, the valves are set one above the other, and at the front and rear of the cylinders, operation being from a transverse cam shaft extending through the crankcase. The cam shaft is an integral forging with bronze bearings at each end. The bearing at the right side of the motor is provided with a flange by which it is held in place in the crankcase. The flange extends above the edge of the cam gear so that the screws holding it in place may be readily removed, after which the flanged bushing, shaft, cams, and gear may be slid out of the crankcase.
Silent Valve Action
Valve action is by direct thrust through the mushroom tappets. The intake valve is operated by an overhead rocker arm pivoted to a forged yoke secured to the intake manifold. To insure silence of this valve the thrust rod is a spiral spring, the upper end bearing against the flange and the lower end bearing against the a collar on the thrust rod. The valve gears comprise two idlers, interposed between the main shaft pinon and the cam gears. These idlers run on studs adjustably secured to the crankcase, thus the idlers may be accurately in their relation to the main shaft pinion and cam gears, and wear readily taken up. The idler engaging the magneto gear is similarly carried. A single housing, which covers all of the gears, may be removed for access to the gears without in any way affecting their adjustment, and any individual part of the cam and magneto mechanism may be removed and replaced without interference with any other part.
Spark Plugs are vertically situated immediately in the center of the cylinder head. Ignition is by Berling magneto situated in front of the crankcase on a platform cast integral therewith. A feature of this motor is its compactness and smooth finish, there being no extreme side projections. The magneto is so situated that no extra extension of the motor gears is required and the exhaust pipes are carried down close to the center and entirely outside of the crankcase.
Control System and Frame
Control is by grips through encased wires and sliding rods. The spark control rod has a hinged “Y,” one arm leading to the compression release levers and the other to the magneto, their relation being such that just as the magneto reaches its extreme point of retarding the spark the exhaust valves are lifted. The frame construction is the popular camel back loop type, with a spring seat post of exclusive design.
Spring Saddle Mounting
The post is an “L” with the short arm pointing downwardly from the pivotal point. The rear of the frame is provided with a yoke to receive the seat post. The spring is of the plunger type and enclosed in the lower horizontal frame tube. The plunger rod is of extreme length, extending practically the full length of the tube, and the springs are correspondingly long. The load is carried on a spring of rectangular section. The recoil is checked by a somewhat lighter spiral spring. The rear end of the plunger is provided with a vertical slot engaging the bottom of the downwardly extending arm of the hinged post. By the construction of the frame fitting the entire moving mechanism of the spring post, except the horizontal extending member to which the saddle is clamped, is encased. But the whole assembly may be removed from the frame by merely drawing out he pivot pin.
Single Plunger Spring Fork
The spring fork is the single plunger type and comprises a trussed main fork with extension sides and the movable fork secured at the bottom by rocker arms and operating through the load and recoil springs at the top. The top of the movable fork carries a pivotally seated cross bar, through which passes the spring post. Between this cross bar and the top of the spring post is the load spring and below the bar is the recoiling spring. The recoil spring is exposed, but the load spring is covered by a telescopic sleeve. The handlebar is the three stem type, engaging both the extension fork sides and the main fork stem, which carries the head bearings.
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