Nor­ton launch stun­ning new V4

Old Bike Australasia - - BUZZ BOX - From Alan Cath­cart

The Nor­ton V4, the first all-Bri­tish hy­per­sports model ever to reach the mar­ket­place, was un­veiled at the Birm­ing­ham NEC Show on Novem­ber 19, with the de­but of not one, but two ver­sions of the hand­built, UK-de­signed 1200cc Su­per­bike – one of which is al­ready sold out. The all-new Nor­ton V4-SS and V4-RR are the most tech­ni­cally ad­vanced road-go­ing Bri­tish mo­tor­cy­cles yet pro­duced, and will en­ter pro­duc­tion next year, ac­cord­ing to Nor­ton Mo­tor­cy­cles owner/CEO Stu­art Gar­ner. 250 ex­am­ples of the base model Nor­ton V4-RR cost­ing GBP28,000 will be built in 2017, along­side the lim­ited-edi­tion Nor­ton V4-SS priced at GBP44,000, all 200 ver­sions of which have al­ready been sold prior to its launch to cus­tomers ea­ger to ac­quire the ul­ti­mate per­for­mance mo­tor­cy­cle bear­ing the name of Bri­tain’s most his­toric sport­ing brand. Both ver­sions are pow­ered by the all-new Euro 4 com­pli­ant liq­uid-cooled 16-valve 72-de­gree V4 en­gine with chain-driven dohc de­vel­oped by Nor­ton at its Don­ing­ton Hall fac­tory, in con­junc­tion with lead­ing de­sign con­sul­tants Ri­cardo Mo­tor­cy­cle. Mea­sur­ing 82 x 56.8 mm for an ex­act ca­pac­ity of 1200cc, the en­gine will be built in-house in the Nor­ton fac­tory and pro­duces in ex­cess of 200 bhp at 12,500 rpm, with max­i­mum torque of 130Nm de­liv­ered at 10,000 revs. It fea­tures ti­ta­nium valves, a 6-speed cas­sette gear­box and slip­per clutch with au­to­blip­per pow­er­shifter, plus dual in­jec­tors per cylin­der and a con­stantly vari­able in­take length sys­tem. There’s a full ride-by-wire throt­tle con­trol­ling the front and rear cylin­der banks in­de­pen­dently, which of­fers a choice of three rid­ing modes – Road, Track and Pro-Race. “The V4 is en­tirely our own en­gine de­vel­oped to­gether with Ri­cardo,” says Nor­ton’s Head of De­sign, Si­mon Skin­ner. “We’ve pack­aged and de­signed the mo­tor­cy­cle at the same time as the en­gine to al­low us to put ev­ery­thing where we want it, and it’s al­lowed us to cre­ate an in­cred­i­bly com­pact pack­age. For a 1200cc 72-de­gree V4 it’s in­cred­i­bly tiny, yet the rid­ing po­si­tion means taller rid­ers are com­fort­able too.” Fur­ther elec­tronic as­sis­tance comes with the pro­vi­sion of a six-axis Bosch IMU/In­er­tial Mea­sure­ment Unit to give the rider full con­trol of the 200bhp TT-in­spired mo­tor­cy­cle, us­ing one of the most ad­vanced sys­tems avail­able. “It fea­tures trac­tion-con­trol, en­gine brak­ing strate­gies, launch con­trol and cruise con­trol,” says Skin­ner, “along with a dat­a­log­ging sys­tem for use on the track, as well as anti-wheelie, au­to­blip­per down­shifts and a quick­shifter up­shift.” A full-colour seven-inch TFT touch-screen dash mon­i­tors pro­ceed­ings as well as giv­ing the rider ac­cess to the elec­tron­ics, with a rear-view cam­era replacing the mir­rors. Each model has a dif­fer­ent chas­sis de­sign, but with the V4 en­gine act­ing in each case as a fullystressed com­po­nent, with the lim­ited-edi­tion V4-SS fea­tur­ing a hand-pol­ished (tak­ing 26 hours!), hand­built alu­minium twin-tube frame based on the SG5 TT-racer’s chas­sis, and a sin­gle-sided bil­leta­lu­minium swingarm weigh­ing just 3.1kg, ma­chined down from a sin­gle 70kg bil­let, whereas the se­ries-pro­duc­tion V4-RR fea­tures a cast alu­minium chas­sis and swingarm. The two bikes share a com­mon fully-ad­justable chas­sis ge­om­e­try for­mat de­vel­oped on Nor­ton’s SG5 Isle of Man TT race­bike, with both the head an­gle and swingarm pivot ca­pa­ble of ad­just­ment. Each has a 1430mm wheel­base, 570mm long swingarm for ex­tra trac­tion, and a stock 23.9º rake for its 43mm Öh­lins NIX30 fork, with a TTX-GP rear monoshock spe­cially de­signed by Öh­lins for the Nor­ton V4. The Brembo brake pack­age fea­tures twin 330mm fully-float­ing front discs gripped by light­weight M50 Monoblock ra­dial calipers, with a sin­gle 245mm rear disc. Seven-spoke BST car­bon wheels equip the lim­ited edi­tion V4-SS. while OZ forged mag­ne­sium wheels are fit­ted to the V4-RR, shod on the show bikes with Met­zeler Racetec RR tyres – the rear one a 200/5517. Claimed dry weight is 179kg. All body­work is made from car­bon-fi­bre by BST in South Africa, in­clud­ing for the first time on a streetle­gal mo­tor­cy­cle the 18-litre Kevlar-re­in­forced fuel tank. The V4-SS comes in un­painted car­bon fi­bre, with the V4-RR in a spe­cial hard-to-work-with sil­ver-im­preg­nated paint re­sult­ing in a TT-replica chrome fin­ish, just like the Pepe Jeans-spon­sored SG5 race bike. Full LED lights are fit­ted front and rear. A com­plete ti­ta­nium race ex­haust sup­plied with af­ter­mar­ket tune is the only op­tion on ei­ther model, weigh­ing 8kg lighter and pro­duc­ing 10bhp more, with­out be­ing street-le­gal. Other­wise, this new twowheeled best of Bri­tish comes fully equipped, ready to make a mark on the gath­er­ing horde of high end hy­per­bikes.

MAIN The Nor­ton V4-RR, all car­bon fi­bre and yours for just GBP 28,000. ABOVE The V4-RR with its sil­ver-im­preg­nated paint job.

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