1958 Triumph Twenty-One - 2-Page Vintage Motorcycle Article

Description: Yes we combine shipping for multiple purchases.Add multiple items to your cart and the combined shipping total will automatically be calculated. 1958 Triumph Twenty-One - 2-Page Vintage Motorcycle Article Original, vintage magazine articlePage Size: Approx 8" x 11" (21 cm x 28 cm) (pages are front and back)Condition: Good NEW MODELFROMCOVENTRYIt was just twenty-one years ago that theTriumph company was taken over by’ itspresent management. To commemorate theoccasion of its “coming of age”, the Tri-umph Engineering Co., Ltd. is launching onthe American market a completely new,ultra-modern 350cc motorcycle aptlynamed, for both the anniversary and itsdisplacement, the “Twenty-One”. Since thelarger part of the Triumph line comprisesmachines of 500 and 650cc capacities, thenew 80 mph middleweight will fill the gapbetween the 200 cc Tiger Cub and theselarger models.Outstanding features of the new modelare unit construction of the engine andgearbox, and comprehensive weather shield-ing in the form of a well-contoured pressed-steel enclosure on the rear half of the ma-chine which supports a foam rubber twin-seat. The Twenty-One has an overheadvalve, twin-cylinder four-stroke engine of21 cu. in. (348 cc) capacity. Another at-tractive feature is the inclusion within therear enclosure of such items as the oil tank(a dipstick is provided), tool tray, car-buretor air filter, battery, and most of theelectrical equipment. All these componentsare neatly and compactly stored beneath thetwinseat. Both wheels are of 17 in. diame-ter, typifying the current trend towardsmaller wheel sizes.Embodied in the new 350 is the wealthof experience in vertical twin designamassed by the Triumph firm.Technically, most interest will centeraround the design of the unit constructionpower-unit. The crankcase is in two parts,split lengthways, and embraces both thecrankshaft assembly and gearbox. The gearcluster is housed in its own compartmentwith separate lubrication in the normal man-ner. The whole engine/gear unit is remark-ably clean: there are no awkward cornersto make cleaning a hard task. There is acommendable lack of visible oil pipes andcontrol cables, and the distributor mountedon the crankcase behind the timing sidecylinder has its leads and cap enclosed bya rubber cover. Two slotted oil filler capsfor the gearbox and primary chaincases areconveniently located on top of the enginecasing. The engine/gear unit is fitted in theframe in such a way that removal is a sim-ple and straightforward job. An interestingfeature of the gearbox design is that theshafts and gears can be taken out withoutdisturbing the selection mechanism or theengine in any way.Bore and stroke dimensions of the Twen-ty-One are 58.25 mm. and 65.5 mm. Thecompression ratio is 7.5:1. A ball racesupports the drive side crankshaft and aplain bearing of high duty material is em-ployed for the timing side. Big-end bear-ings are of the micro-babbit thinwall type.An alloy cylinder head is fitted on a castiron cylinder block which has an alumin-ized finish to match the head. Phillipsscrews secure the rocker boxes and areused for the primary chaincase outer casing.The valves are pushrod operated from twogear driven camshafts. Neatly tucked awaybeneath the gas tank is the oil feed pipeto the rocker gear—the only visible oil feedabove the engine.The extensive enclosure of the rear halfof the new model together with a stylishfront mudguard of very generous propor-tions gives excellent rider and machine pro-tection from road dirt. That the oil tankis concealed inside the "bodywork” is an- 11206-5712-04

Price: 11.59 USD

Location: Kingsport, Tennessee

End Time: 2024-09-12T16:45:40.000Z

Shipping Cost: 5.95 USD