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1963 Norton 750 Atlas - 4-Page Vintage Motorcycle Road Test Article
Original, vintage magazine advertisement / articlePage Size: Approx. 8\" x 11\" (21 cm x 28 cm)Condition: Good
NORTON 750 ATLASONE YEAR AGO, give or take a few days, we weregiven a Norton Manxman to road test, and whilethere were a few things about the machine that we thoughtcould be improved (we think every motorcycle can beimproved), it still left us very impressed indeed. Now,after the passage of twelve months, and after the testingof a great many more motorcycles, we have been givenanother Norton, the Atlas, and we are pleased to reportthat it is even better than the Manxman.The major (and virtually the only) difference between ;the Manxman and the Atlas is the engine. The Manxman\'s |engine is a stroked version of the original 500 Dominator, jand with a “sport” camshaft and dual carburetors it pro- ’duced a claimed 52 bhp at 6500 rpm. The Atlas is much ;the same engine, but with a bore enlarged from 2.68 to2.98 inches, boosting its displacement to 745cc; up from |the Manxman’s 646cc. We have no specific engine databeyond a vague statement that the Atlas has “in excess of :60 bhp at 65 rpm,” but we believe that little has been !done but the increasing of the displacement. If that is true,it has been enough. The Atlas is, if memory serves us !correctly, a less fussy machine than was the Manxman:more willing to run very slowly and more agreeable about |starting when cold. It seems to be utterly without tempera- Iment, and is equally willing to slog along at less than 1000rpm, in fourth gear, or to scream down the road makingbuzz-saw noises. The power peak is at 6500 rpm, and the ;makers recommend that no more than 6800 rpm be used, ,but the power does not really drop away until well past jthe 7000 rpm level. Valve float occurs at just under ;8000 rpm.Taken strictly as a piece of design work, there is noreason why this engine, which is decidely long of stroke,should accept so much punishment with so little protest.It has the same general lower-end layout as most other jvertical twins, and the valve gear — actuated by a singlecamshaft on the exhaust side of the engine — is a bit moreheavy than, for example, the Triumph. However, one...17649-bxt 12884-AL-6303-08
