Cycle News is a weekly magazine that covers all aspects of motorcycling including Supercross, Motocross and MotoGP as well as new motorcycles
Issue link: https://magazine.cyclenews.com/i/103448
P34 IN THE WIND umph parallel-twin motor. Both new bikes, however, powered by Métisse's own air/ oil-cooled eight-valve paralleltwin 1000cc motor with 360-degree crank (both pistons rising and falling together), which measures 98 x 66 mm for 997cc and delivers 97 hp at 8000 rpm at the gearbox, but with an extremely flat torque curve peaking with 70ftlb. This good-looking, very compact engine was designed by ex-F1 engineer Tim Baker, and will be manufactured for Métisse by AER/Advanced Engine Research in Basildon, Essex, one of the leading companies in the British Formula 1 industry supply chain (www.aerltd.com). The powerplant uses twin anti-vibration counter-balancers centrally located at the front and rear of the horizontally split crankcases. These are gear-driven directly off the center of the one-piece billet The Metisse Mark 5 Street Scrambler. steel four-bearing crank, which carries Arrow steel connecting rods fitted with Capricorn pistons delivering 10.5:1. The eight-valve cylinder head features paired 37mm inlet and 32mm exhaust valves, each with dual springs, and Piper cams driven via a modular system. This sees an intermediate gear running directly off the crank on the right of the engine, driving a chain that runs to another idler pinion, off which the twin overhead camshafts are themselves gear-driven. Twin 42mm JVC throttle bodies are used, each with a single Ford car injector, controlled by AER's own ECU. The production version of the unit construction engine will have a dedicated sixspeed gearbox, matched to an AP clutch and gear primary drive. This all-new engine is housed JOHNSON, BOWERS SPLIT WILKES BARRE WIN C had Johnson and Tyler Bowers of the Babbitt's Monster Energy/Amsoil Kawasaki, presented by Maxxis, team, came away with wins at the AMA Arenacross Championship round in Wilkes Barre, Pennsylvania, December 9-10. Johnson collected his first win of the season on Friday night, while Bowers finished it off with a win on Sat- 32-41 Wind.indd 34 urday night. On Friday, Jeff Gibson, aboard the FMF Power/Poynt TUF Honda, and Johnson fought for the lead until Johnson made the pass for the point on the 14th lap and stayed there for the rest of the race. Gibson held on to finish second, followed by Gibson's teammate Cole Siebler and KTM rider Kelly Smith. Bowers finished fifth after falling while running third. On Saturday night, Bowers had to come from behind, passing Smith on the 16th lap to take the eventual win, his fourth of the season. Smith finished second, followed by Johnson and Gibson. Gibson, however, still holds the points lead – six points clear 12/12/11 2:40 PM